by jzisa, published

V29 by jzisa Dec 7, 2015

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V29 by jzisa is licensed under the Creative Commons - Attribution license.

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By popular demand I have added a de-badged version of the V29. It is labeled V29D in the thing files section. I originally put the version number on the whistle to tell them all apart as I was developing them. I kept it on the final design because as I went through version after version it became part of the whistles story for me. A few people have asked for a version without the text and recently Fusion 360 posted a video where they, among other things, removed the lettering from the V29 using Meshmixer. I was thrilled to see my design on my absolute favorite youtube channel and I decided to trust your feedback. Enjoy!
I posted their video bellow.

The MakeItLoud V29 got its name because it is the 29th version I designed for this challenge. It is a survival whistle that is a completely original design. I designed it to be rugged, easy to make and carry, have a great design and most importantly be very loud. It is designed to be able to get you noticed in all conditions.

For ruggedness testing I spiked it into the pavement as hard as I could repeatedly. Then I ran it over with my car twice. Finally left it in a glass of water for two hours to make sure that it would not sink and would drain and whistle immediately after taking it out. It still whistles.

The design is meant to look as clean and simple as possible while still looking like a whistle. It was also designed to be easily gripped with thick gloves or cold hands. It has a raised lip on the bottom and grips on the top to allow you to hold it securely in your mouth even if you are blowing as hard as you can. There is a hole in the back for a key ring or lanyard so you can wear it around your neck or attach it to your zipper or keychain.

Another huge focus in designing this was to make it printable in one piece with no supports or rafting. I wanted someone to be able to print this before going for a hike or something with no assembly, cleanup, or fuss of any kind to get it ready. Just print and go!

The whistle actually has two slightly different tones produced at the same time by separate chambers on either side. The two different tones alternate between amplifying and canceling each other out. This variation creates the shrill sound much like a pea whistle that is more attention grabbing and does not get lost as easily over background noise like a single tone whistle could. Unlike a pea whistle however it does not jam if blown too hard and will not freeze up in cold weather. I tested the volume with my decibel meter and it reached 118.7db. The harder you blow into it the louder it is so someone with a stronger lung capacity may reach louder levels. Be careful it can hurt your ears a little bit at that level.

I started designing and printing prototypes from the day this challenge posted knowing next to nothing about how whistles work. Through many hours of research and testing and constant trial and error I produced a whistle that I am very proud of. It took 29 tries but this whistle met all the goals I set out to achieve.

For loudest results blow as hards as you can in a burst! The international distress signal with a whistle is 3 long blasts.

I hope you print it for yourself. Enjoy!

Print Settings

Printer Brand:



MakerBot Replicator 2






.2mm layer height in model but any is fine.


100% in model but any is fine but may effect durability.


To print with no supports print with flat top side down. I have to give a huge thanks to my good friend James who printed all 29 versions for me with his printer. Thank you James!

Custom Section

Why I Designed This Whistle

As a teenager I spent many summers working as a lifeguard. One time while trying to rescue two people at one time I ran in to trouble. Things did not go well and the two people started pulling me under. Just in time another life guard jumped in to help. The other guard was no where near line of sight but he heard my whistle just as I jumped in and came right away to help. I wanted to design the best whistle I could because I know from experience the demands that they face and what its like to depend on one.

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Oct 20, 2016 - Modified Oct 20, 2016

2 printed, PLA 20% fill, layer 0.2mm, shell thikness 1.2mm prusa i3, works perfect, very nice design

Used 100% fill and used the fixed file. Looks pretty good, but does NOT whistle at all. Very Disappointed. Waste of time and filament.

It doesn't sound. So disappointing.

I've printed 3 pcs few month ago, and all of them were really loud. Gave all of them to friends. Now a friend of mine asked me to printed 2 more pices. I've printed 3 pcs sliced with Cura and Slic3r with 100% infill. Used PLA as before. But all 3 whistles don't make sound (only quite sound of passing through air. I don't understand what's wrong?!

Didn't work, printed 0.3mm layer. Air goes through, but no sound coming out.

did not work also, don't use supports

Printed this twice, both work perfectly :).

0.2mm layer, 100% fill, print head 200. Took an hour and a half to print.

Now I'm off to do another six for my son's patrol to take on scout hike :)

I printed this with 0.25 layer, 3 shells, 0%infill. But i cant get it to make any sound. If i cover both hole with fingers, there is air coming out of whole whistle, so it looks like its not printed good.The print itself looks good. I used cura, what setting should i change to get it air tight?

I made one yester day, and it works very well :) I made a Video of me printing it, hope thats OK ?? :D


can someone please post which file they printed? I just tried twice, one was without any sound, the 2nd print is a bit better but not really loud :(

Mine works fine, it is not a gentle whistle you need to give a good blow with some pressure behind it, it is loud but does not much sound before it gets loud.

Printed on a Zortrax M200, 0.19mm layer, medium infill, Z-ULTRAT material, and it works amazing.
It took slightly less than 2 hours to print it.
Nice work!

is it possible to alter the V29 on the whistle? I am a noob and not sure if that's ok.
tysm, rosiex

Made one with Hatchbox ABS on Wanhao. First one didn't make any noise, 50% infill and the mouth piece lifted a bit from the bed and it wasn't very air tight. Second one at 100% infill and 8mm brim worked perfect.

What where the rest of your settings? Mine printed great on the Wanhao D6 but close to zero sound.

Perfecto, suena como era de esperar. Yo lo he impreso en PLA con boquilla de 0,3 a 0,2 de resolución en 1:34 minutos con una mendel max xl.

I have printed this piece 2 times on my TEVO Tarantula printer. I made no modifications to the piece and printed without supports but it still made no sound. Very disappointed

This is a really nice piece of work that does precisely what the maker describes. Sturdy, loud and easy to print without supports. Well done.

Gack - printed twice but struggling Newbie printer operator here and jsut looking around for some things to print for my middle school science class.
Printing on an Afinia H800, z .15mm; switched to shell fill on second print with PLA. Having a hard time digging supports out of mouthpiece entry.
Any help?- Thanks

Aug 2, 2016 - Modified Aug 2, 2016

This is now clipped to my pack. Awesomely loud. In fact, I hurt my ears the first time a blew it. Nice work.

Printed in SLA on riverside. I think I left it in the alcohol too long, but it made no noise :(. I will give it another try

Jul 21, 2016 - Modified Jul 21, 2016

I dont have a fancy printer and in worked on first attempt......great design thank you !

Printed on Dremel 3d20 / FlashForge Dreamer
50% fill

Very loud ....works amazing !

That looks and reads really great.
Wonder how long it took to find those two alternating amplifying/canceling tones...
@Others: How can you only ask about the V29? That makes my head shake.

that crazy :D
sometimes hurt my ears.

Printed in PLA an PETG. VERY loud! Thx for the design!

I think the V29 gives it character like a branding. You are very kind to remove it given the effort you've put into the design. I'm printing the D model now but I will probably print the V29 next.

The only change I would make is to make the surface on the inside bottom of the whistle (inside top while it's printing) at a different pitch than parallel to the print surface, just so it doesn't look as tore up when it prints (mine required some x-acto touchup)

Tried printing it twice both with 10% fill and 40% fill. the blow test was a fail. Probable closer to 40db if you suck up a whole lung of air before blowing hard. I have a SeeMeCNC Rostock Max with ABS 1.75mm, .5mm head, standard layer height at .2mm, 3 solid layers top and bottom, standard quality, infill with triangles.

Has anyone printed a working part on this printer?

So can this be printed without supports and if so, how should it be arranged?

It's already arranged to be printed without supports, at least when I dropped it in Cura

I've made 15 of these for our Boy Scout Philmont trek. They are SO loud! Printed in PLA on a Lulzbot Mini and I printed 3 at a time in standard mode. I used the V29D_Fixed file and didn't have any problems. Thanks for the design.

printed 3 times, barely makes a noise for me

Did you print 100% infill ?

Jun 16, 2016 - Modified Jun 16, 2016

I've just finished printing mine.
Prusa i3 , sliced with MatterControl
1.75mm ABS at only 200°C
0.4mm nozzle
layer height: 0.25mm
shell thickness: 3 layers
top/bottom: 1mm
infill 40%

Tried it...and I was deaf for a moment!

I've printed both files now and neither of them work, can anyone give me any tips of what settings to use?
I'm printing with a wanhao duplicator i3 with play 1.75 and the slicer is cura.
My setting i used are:
layer height: 0.2mm
shell thickness:0.8mm
bottom/top thickness:0.6mm
fill Density: 100%
print speed: 50 mm/s


I'd recommend slowing bridging speed RIGHT down, and make sure you have the fan set for 100% on bridging. I use an acrylic i3, and first time, worked beautifully. I can see where bridging could cause some major issues.

just been reading all the comments, Im making the original after the newer version didnt really make a noise for me. Question, what flow rate speed is best for printing, i seen some post that its taken many hours. whats the best. Im only new so any input is helpful

I don't remember exactly, but mine was a bit over an hour on an Prusa i3. Works perfectly.

Wow! This thing is loud!

I verified that it works great on my makerbot. If you can be more specific about the problem you had maybe I can help.

Fixed file doesn't work

Works as charm! When i blew in, my hears nearly fell off! Printid by Prusa i3 with 0.2 mm layer.

Works as charm! When i blew in, my hears nearly fell off! Printid by Prusa i3 with 0.2 mm layer.

I just printed the "fixed" version as well and it doesn't work. What are the size dimensions that this should be printed at?

It should be about 63mm long. I printed it on my 5th gen maker bot with 2 shells 10% infill and .1 layer height before I posted it and it worked great. See if maybe those settings help you.
If anything if maybe go 3 shells though to make sure it's air tight. Also check to during the print that there is no excess stringing in the air channels or chambers that might disrupt flow. Hope that helps.

Cool, I'll try that and let you know! Thanks for the help!

The V29D version is broken. Its around 90 mm long whereas the V29.2 version is around 63 mm. My 90 mm long print produces no sound. I have yet to try the original version.

You are right. I have no idea how this happened but the model broke somehow. I fixed it and updated it. It is now called V29D Fixed. I am doing a test print right now but I am confident the issue is solved. Thanks for catching the issue.

I have printed several dozen and they work great for kayaking!


It does not work!!!
Don't waste your time like me.

May 15, 2016 - Modified May 15, 2016

Please change you instructions to tell us about the issue most of us are having!

A lot of us are printing this and it doesnt work.
I think the main reason for this is that when we import it into our slicer it is imported in the mm scale, not the inches you seem to have worked on.

Because of this, instead of the whistle being 63.5mm in length, it is actually 90mm.

I assume because of this, those of us who have printed the larger version due to using mm, when we blow into our whistles, the air just flows out the sides rather than entering the chambers.

That and my print took 3.5 hours on 0.2mm layer height and 25% infill, whilst other have claimed to do it in an hour or so.

So please update the instructions or add a new stl with the correct measurements when using mm.

At least I hope that is the issue. Will be printing the scaled down version tomorrow and will let you know.

Hey I am sorry for the trouble you and some others have expressed. I do want to hear about the issues people have because I am planning to put together a troubleshooting guide very soon. I do ask for your understanding though as it is very difficult to identify the differences between the people who have a lot of success and those who don't. There are many factors that could contribute but in the end the physics maters on this item so if there is something off in the print it probably won't work. If there are common issues that can fix some peoples problems I want to find them.

As to your specific issue, you would definitely have a problem if the scale was off. What I don't quite understand at this point is how it would be off by less than 30mm. If it was an unit conversion issue I would expect it be off by around 25 times(1inch=25.4mm). Maybe I'm missing something there. What slicer are you using so I can try it?

Also some people mentioned that the debagged version is one degree off from flat. I will post an update for that this weekend.

Thanks for posting.

May 17, 2016 - Modified May 17, 2016
bigo93 - in reply to jzisa

I downloaded it from here, the V29D.stl, and just opened it up in Cura 15.04.5

I couldnt print out a scaled down version as my Z axis threaded rod somehow has detached from the coupler on my prusa i3. Couldnt be bothered fixing it today.

But yeah, I too am confused why it would come up at 90cm if it really is a matter of inches and mm.

Well I downloaded and opened the V29.2 stl, and this one opens with the correct measurements, 63.881mm
I guess the scaling for the V29D stl that you have uploaded here is wrong.

So could it be those with prints that do not work are printing the V29D stl one, not the V29.2 stl?

Yea you are right the model broke somehow. Wish I understood what caused it but I fixed it. I called the new file V29D Fixed. I am trying a test print now and I would love it if you could test the new one for me if you get time. Thanks for finding that issue!

cxi - in reply to bigo93

Oh I wish it only took me 3.5 hours! Mine took ~8 hours to print and also does not work, just air blowing out the sides.

May 2, 2016 - Modified May 2, 2016

Works well if you blow forcefully into it. If you blow softly you won't get hardly any sound, so be sure to blow hard.

i printed this at
50% infill
.2mm layer height
.8mm shell thickness
with black pla. I also changed curas default retraction from 3mm to 4.5mm for less stringing and this thing is louder than i could ever expect!!
My wife works at a public swimming pool and i think its going to work great. The only issue i had is that the model seemed to be at a 1 or 2 degree tilt or it is missing a section on the top right. everything works still but doesn't look as pretty on that one side.

It does not work for me. I can only hear the sound commint out of it

I waited 2 hours on making this and now I have junk!!

does not whistle

Just made one. Left Chamber seems ok, but not so loud. Right Chamber doesn't work at all. No Sound, no matter how hard i try.

Mine is not loud. Not at all.

Printed on a Prusa i3 x with ABS. Used 30% infill and sliced it with siimplify3D. I used custom supports for the areas I could reach. I believe that using the option to print from the outside-in is what makes the difference between a ok/not working whistle and one that is loud. This helps keep the knife edge sharp.

I have made V29.2....Doesn't work

For some reason the X axis rotation on the newer v29d model was rotated by 1 degree when i opened it in Simplify3d...just in case anyone else finds the first few layers printing off the bed thats why

printed in PLA.... works great!!

one suggestion, do not connect it to air tank at 10-12 bar.... especialy in closed space.... it goes to ultra sound! :-D

Hello, does this whistle work while its wet ? :) i'm new to diving and i want to try this thing out. :)

Thank you for a great model!

I just printed this out of Hatchback Wood filament. It looks and functions great.
Printed at 0.2mm and 40% infill on a Rapidbot 3.0

Mar 19, 2016 - Modified Mar 19, 2016

I printed it, its loud but my gauge pointed only 100,8 dB

I think it depents on material, temperatur, bridging and stringing

What a great and fun design! Printed without problems at 0.2mm layer height with 80% infill... Wow, this one is really, really loud! :D

Mar 8, 2016 - Modified Mar 8, 2016

118db ???

I thought it was just me, but apparently a lot of people had trouble with this..
Nice design, but seems to be a lot of hassle to make it work - think I might try splitting it and printing in two pieces?

I tried to print about 10 of these now. I keep getting clogs. I am gonna try to slow it down and scale it up as tigglebitties said. I printed the smaller version and it works ok. Only clogged a little.

agh. took several tries- the right side channel air splitter piece kept getting small stringers between the splitter and the walls of the channel. I had to scale it up to 110% and print SLOW SLOW SLOW. 100% fill, glow in the dark PLA.
final product finally took a while cleaning up with a dental pick. either way, its LOUD! Thanks man this is great. I plan to print out several of them and keep with my camping gear

Made one. Insane loud whistle. Good flow through both sides.

Made on my Wanhao Di3

0.2mm layer, 100% infill, 195C/70C, 40mm*s

Can't get mine to work any tips?

Can someone please explain to me: How did this win if it was uploaded AFTER the DEADLINE of DECEMBER 6TH? It clearly says it was uploaded the 7th.

I uploaded it just before 10pm EST on December 6th. A few other people who posted even a few hours before me also show up on the website as being posted on the 7th. Not sure why maybe it rounds up. Interestingly if you look at it on the app it shows the upload date as the 6th. Go figure. Point is I made very sure to submit on time and I totally understand the concern as it would be completely unfair and there were late posts that came in the days that followed.

I like the design but unfortunately both prints I made didn't work. Super high pitched air on one side but no whistle.

Printed on PLA with my prusai3 0.1mm layer height and 25% infill. It is so loud it makes my ears ring.

wow, what are your other settings when printed this one.

That, is a very nice piece of CAD.

Printed the first time on my Cube. Took 4 hour. Works Great.

Feb 13, 2016 - Modified Feb 14, 2016

For my first print I tried PLA with 25% infill and only one chamber worked. I also found that that the whistle leaked when I covered both exit holes and blew into the whistle.

For my second print I used 100% infill and everything worked. But I thought it was pitched too high.

For my third print I scaled it up to 115% all around (Simplify3D) and I like the lower pitch better. However, you can see that the
"ceilings" in the air passages are pretty rough looking and I don't know if the print job could take much more of an increase. I might try another 115% overall, and then an additional increase on the Y axis to make the chambers longer.

Feb 10, 2016 - Modified Feb 10, 2016

Will it work if i print it at 50%

No. Just tried it. I tried it at 60% and I can't hear it. The cats perk up though lol.

wow, what are your settings when printed this one.

It's loud, and I did a time-lapse of my print you can enjoy here https://youtu.be/JdIruzKwatM

I can verify, this thing is really loud.

I have printed this 4 times now, and unfortunately I still cant get it to whistle. It is just air that comes out the sides.

My settings:
Black PLA (110C - 120C varies)
Both 0.2 and 0.1mm resolution
100% infill always
No supports or rafts
Prints were pretty good quality and did not have any "stringers" and only a few distortions
Using Prusa I3

I believe it may be due to the print being slightly porous (maybe the air is escaping elsewhere). I have seen a lot of the 91 made ones being worse quality than the ones I made however.

Any advice?

hwgao - in reply to KKors

It is same with me. I also printed it in 0.1mm resolution.

KKors - in reply to hwgao

So after reprinting I noticed that the channel throats (see http://imgur.com/nfRzafJ) were becoming clogged due to my retraction setting. I had the retraction for over 4mm and since this is less Slic3r would just go right over it. I used a knife and tweezers to remove the jam and now it works (though could be better as there is still some blockage).

Not sure if this is your problem but give it a shot. You can even cut the one you have right now and see if it is clogged.

Let me know if this helps.

Same happens for me. But mine does make sound if i blow it with all my power

Congrats on winning the contest!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!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This print gave the fan a good workout XD. it went on so many times!

Totally epic design. I'll post a print picture soon.

I work at a resort where many people ski or board to and from work (often after dark,) but many people still don't carry survival whistles.

Would it be alright with you if I printed a bunch of these and passed them out to coworkers?

I work with boyscouts can i print some out and hand them out to the troop?

jzisa - in reply to RMWest

By all means please do! I'm really glad it can work for you. Enjoy!

RMWest - in reply to jzisa

Thank you! I'll report back eventually (I don't have as much time as I'd like for my printing hobby) and let you know how it goes over.

Feb 2, 2016 - Modified Feb 3, 2016

I printed one with Afinia H480 at .15mm with ABS. The printer decided to put supports on it and on the inside chambers. I tried to remove as much as I could but there still remained some bits inside. it doesn't blow too great.
edit I managed to remove the inside supports from the chambers with a dentist tool and now it works great.

I´ve printed it right now but no sound going out....just the air moving fast. seems like I waste my time and plastic here.
Printed at 0,2mm and 25% infill by the way. Some ideas to fix it maybe? thanks

Great job!
First try it sounded like a toy whistle, then I blew really hard. That second time was over 100 decibels... It had to have been...

I printed this twice in PLA at .2mm and 30 - 50% infill. Found that you have to blow very hard to get the sound you would expect.

I print this on Wanhao D5S. It's great, so loud and work perfect. Thank you so much!

Works great and is super loud. Printed on M3D High resolution and Medium infill. Only downside is that the print took 10 hours

I like the picture that shows your progression. I'm printing a couple right now, one on Makerbot Rep 2 and one on a printrbot.

does it work if you print it at a smaller scale? like 0.8?

You probably could, but Im guessing it would sound different or not be as loud...

Amazing whistle! First time I didn't know how hard to blow. I requires quite some burst of air but when you're past some kind of level it suddenly starts making a hell lot of sound! Printing a few more now so I can give them to my friends.

Printer: Prusa i3, 0.2 mm, no support or raft, printed on heated bed @ 60 C with blue painters tape, PLA @ 195 C, average speed: 30 mm/s, infill 20%

Ok, my ears are ringing after taking your advice! I had been blowing too softly. Thanks for helping me get it to work.

No problem! First time my ears were in pain as well, I tried it indoors... not so smart :)

Great job! It's very nearly as good as a Fox 40. In fact, if I didn't have one here to compare it to, you probably couldn't tell the difference.

The Fox 40 has a very slightly "wider" sound. The both require about the same amount of "blow" but the Fox 40 is a bit louder and has a nicer warble to it. Considering the limitations of 3D printing, this is an excellent design.

The Fox 40 is my go to referee whistle. Now that you said that I have to print one and compare!

Printed at 0.15 layer height and %100 infill on pla, this is simply amazing. Rock solid and extremely loud.

Jan 14, 2016 - Modified Jan 14, 2016

for me the right only one works
0.3mm layer hight
top/bottom: 1.2mm
shells: 3 (1.2mm)
, but quite fast. it sounds like to much air is coming through and just no high pitch coming. right works great but u have to blow quite hard. maybe ive printed too fast.

if i cover everything it seems there is some air going out... maybe there a little whole in the bottom layer, but on the right(working) side.

Jan 14, 2016 - Modified Jan 14, 2016

Yeah the text looks like crud, it just isn't readable for those of us that use rafts on out prints. On a hairspray setup it might be fine.. Maybe move it to the top?

for me its great but i didnt use raft? i use pla and scotch blue with ~60C heat bed

amazing whistle
printed at a 0.2mm layer height on high settings with 15% infill works perfect with makerbot software on the CTC 3d printer with the PLA that comes with it!

for me only right one works..

going to print it on my ctc 3d today

Jan 11, 2016 - Modified Jan 11, 2016

I have made one, look good but don't works....

PLA, 0.12 Layer, raft, no support...

This looks like a Fox 40 Sharx , which is 120db, looking forward to printing it out to see how it compares. Got to love the power of 3d printers and people like you that take the time to make useful items.

It's possible to get version without version tag? Whole design is really great but version text is ugly. Thanks

I dont understand the no support thing, if its printed top side down then you have a floating piece at the tip of the whistle based of simpliy3d.
see pic

Sorry for the confusion. The top is actually the flat side. So when I say top side down the flat side should be on the printer bed. If you look at some of the makes people have posted many of them show it on the printer bed.

Hope that helps!

scusate, ho stampato il fischietto ma non suona. una volta stampato devo fare qualcosa?

I was wondering if there was any 3D printing experts that could help me. I have a Prusa I3 printer. Every time I try to print it looks like it is slanted. like If your y axis broke the print would be slanted.

Jan 6, 2016 - Modified Jan 6, 2016

Great design, i printed it and it works perfect.

Very loud sound .

Reprap i3 prusa
Nozzle 0.4
With 15mm brim.

I have a problem. I print in ABS, 1 shield and 2 top/bottom solid layer, 60% infill. The aspect is very good but i cant operate it. I think that is for the contraction of material. the right camera isnt work

Hey, sorry your having trouble and I am happy to help however I can. I would try 2 to 3 shells and make sure that support material is off. I had mine printed in PLA but I know people have done ABS too. Do you see any warping in the mouth or side port areas?

Jan 4, 2016 - Modified Jan 4, 2016

i printed 0.25 layer, nozzle 0.4.Good work, too loudly.

I printed two of them. Only the larger chamber is working for me on both. they look real nice. I didn't see anything get printed in the chamber. not certain what went wrong.

That's interesting. What print settings did you use?

If you could, try this:
Cover the entire port where the air comes out on one side with the palm of your hand to stop airflow on that side. While covered blow into the whistle.

Try that on both sides to see if the whistle chambers work on their own.

Let me know what happens and I may be able to offer some suggestions.

Thanks for posting!

Jan 2, 2016 - Modified Jan 2, 2016
dartman180 - in reply to jzisa

Putting my finger on each side was how I figured out that only one side working. On both, putting finger over left hole gave me nothing out of right side. Covering both and I have no leakage. Putting over right side I get tone from the left. 89db on my sound meter. I use a M3D printer, so not really sure what all the settings compare to other slicers, but printer was set to Print Quality high (slow) and Fill Density full (Slowest). Was set to no supports, no model support, wave bonding on, and I used a raft.

One of my friends has this printer. I'm gonna see if I can have him try a few things and I'll get back to you.

I'll look into it and see what I can come up with that may be causing the issue.

Works great, printed it in ABS neon orange. To minimize warping I used only 2 shells and 0.3 mm layer thickness.
With this settings I got print time down from 1:16 h to 0:47 h :-)

Looking at the design there is no need to use thin layers such as 0.2. It prints so much faster with thicker layers, since it will use fewer layers to build the V29.

Thanks for the feedback. I'm really glad you like it!

Jan 13, 2016 - Modified Jan 13, 2016
daniel11609 - in reply to jzisa

i wanted to print with 0.2, but now ill try 0.3 since some other stuff printed well with 0.3
I have PLA hope it works :)

Ok so the really odd part is that the day after I printed the first two whistles I went back and blew them again and they are louder?? It seems like when they were hot off the press they were weak and the next day they were great? Odd but I love them, printing more now:)

Awesome! So glad to hear it! Thanks for the update and for sharing your story too. It feels really good to know how they are going to get used. I'll be sure to let you know when I come out with new versions down the road. Let me know if you have any suggestions. Enjoy!

Printed it without raft or support .2 thickness, it blows but not overly loud, really like the design just wish it was louder?

As noted I use .3 layers, 2 shells and 30% infill and it works great. I noticed when giving it to my kids that they are not blowing strong enough to get the right high pitched loud tone out of it.

The tone it generates is a high pitch 2 tone. It is almost the same when my little 18 month girl puts on her highest pitch when she hurts herself.

Hmm that's surprising. Every one I have made will hurt your ears at close range. I might try it again maybe there is some debris in the resonance chamber or an issue with the edge that splits the air. Let me know if you have any questions. Thanks for posting.

It's a beautiful design, I printed a second one with the shell set to 1 and it works exactly the same. I don't know what else to try. I noticed when I print it that the channels where the air goes past the splitter are pretty skinny.

We printed 3 shells and 100% infill. I'm sure it can work other ways but I wanted to be as sure as possible that there would be no leaks that would cause the pressure to drop or create turbulence in the wrong places. Earlyer designs did have issues with leaking. You have to blow it pretty hard and in future iterations I will keep working to make it easyer. If you are willing I would recommend trying those settings.
Let me know how it goes or if I can be any more help.

Ahh, I'll absolutely try the settings and let you know how it turns out:). I plan on printing a lot of these and attaching one to every life vest on my boat:). I fish offshore in Washington and if you fall overboard we would loses sight of you in about 60 feet from the boat depending on the waves. I really like your design with the lanyard hole and grip size:)

I printed this model on the micro from m3d using the software that came with it. Thought i had disabled support, but apparently not. It printed fine but I spent about 25 minuets cleaning it up and getting all of the support material out. In the end it makes a good dog whistle but isn't very loud next time would not use support.

Yea you should get much better results without supports. Let me know how it turns out. Thanks for commenting.

Downloaded and printed after slicing with Slic3r and checking the size to be 2.5 inch (approx 6 cm)
Came out with support structures at the mouth and on the side notch, probably also inside.
Even after clean-up could not get a sound out of it.

Guess it should be printed without support, right?

Yea one person commented that they had success with supports but it was designed to be printed without support. Smooth airflow is super important. If you get a chance I would try without. Good luck! Thanks for commenting.

Second attempt was perfect!
Sliced with Cura, printed in PLA with 0.1 thinkness. NO cleanup and blasting loud first run.


Awesome!! Glad it works for you and thanks a lot for fallowing up!

I printed it in PLA, looks good, and sounds really loud at first try.

Really glad to hear it! Thanks for the comment!

I've printed it... It works really great ! Truly amazing ;)

Glad you like it! Thanks for commenting!

I am using Cura. How/where can I set it from mm to inches? I see that my design measured 63.88mm long, which is just over 2.5 inches. I then scaled it to 63.5mm which is exactly 2.5in. Is that good enough?

The 63.88 one is right actually go with that one. I will post a metric version tomorrow because it seems like that would be easyer for a lot of people. I am brand new to 3D printing and thingiverse so I didn't know. Thanks for the comment and let me know how it turns out.

Crap... Well I got impatient waiting for a response :) so I scalled it down that small amount and its printing. About 30 minutes left to go, so we'll see what happens! Thanks!

Sorry! I'd actually be really interested to see what effect that has. My guess is just a slightly higher pitch but who knows because all the geometry changes a little bit. I'd be really curious to see how it turns out.

Oh no, you should mention that it is to be sliced in "inches". I printed mine on a metric scale and it just sounds broken. Here is the sound for reference :)

How do I slice of inches? Is that about the layer height or which setting? I'm European ;)

But maybe I'll just trial and error.
Any answer is appreciated

Jan 1, 2016 - Modified Jan 1, 2016
jzisa - in reply to daniel11609

What slicer are you using?

It usually does it automatically but here are the dimensions you should see in metric. Usually you will see overall measurements in the scale section in your slicer.

x 24.92mm
y 63.88mm
z 22.26mm

Hope that helps. Let me know if there is anything else I can do.

Jan 14, 2016 - Modified Jan 14, 2016
Nicolinux - in reply to jzisa

Hm, I printed it with this size settings but it still sounds weird. I'll try again with PLA.

I like cura most, I've got slic3r and replicatorg which I don't use because it's slower.

If I scale it to 100 percent it should show those settings? So those are the original values. I think I got it. Thanks

You are abdolutely right. I'm sorry for the inconvenience. I will add that to the instructions once the judging for the challenge is over as I don't think I'm supposed to edit the posting until then. Thanks for commenting!

Damn it printed perfectly and loud as hell.

Thanks for commenting! I'm glad you like it.

This thing is very loud. I printed 4 of them on straight glass with no support, all of them were very loud. I was curious and ran the thing over with my car, still works, no damage either.

I'm glad you ran it over haha. I'll admit I enjoyed that part of testing it. Thanks a lot for the comment.

I printed it, and it works quite well! One "tiny" suggestion, however. You essentially have two whistles here, with each one tuned to the same frequency. If one was detuned slightly, to maybe 5 Hz different than the other, then you would get a fast beating effect between the two. This beating would produce a similar effect as the ball that some whistles have.

That's a great suggestion and exactly what I did actually. The two resonance chambers have a difference in length of exactly 7%. This does create a bit of a warble but at a higher frequency than you would normally hear in a pea whistle. The effect is still very attention grabbing but does sound a bit different. The research I did suggested a 7 to 12% difference in chamber length to be the sweet spot. One of the versions I did had a more significant tone difference and the effect was lost completely. It's definitely a finicky thing which is part of the reason I have been through 29 versions so far. So that said I am already working on new versions to try to keep getting it better. I will keep experimenting and posting what works which is why I love 3D printing. Thank you for posting!

This thing is ridiculously loud, well done!

Thanks so much! Very happy you like it.

My friend printed it and its incredibly loud can't wait for more filament so I can print my own!

Hey thanks for sharing! Glad you like it. When you print yours share a photo I'd like to see it!

I printed mine with supports, then cleaned out the supports, and it works great. It takes a bit of effort to blow it (I don't know if there's still some internal scaffolding material I couldn't reach or not), but it's very loud. Nice job!

Hey thanks for the comment! I'm glad to here it works well with supports too that may some people.

Doesn't work for me.
Used Cura to slice it and used the model sizes it then had. What needs to be the size of the whistle when its printed?

Dec 10, 2015 - Modified Dec 10, 2015
jzisa - in reply to DjDionisos

Hey DjDionisos,
The model dimensions are accurate, just double check that the slicer has it set to inches instead of mm. I can send exact overall dimensions for reference tonight if that will help.

Yeah that will help a lot! Just can seem to get any sound from is... :(

Ok so the overall length of the whistle is 2 1/2inches.
If your print matches that try the fallowing:
Cover one of the ports on the sides with the palm of your hand. (Try to completely cover the opening to stop airflow.)
While one side is blocked blow as hard as you can into the whistle.
Repeat with other side.

If you still get no sound from either side check for for blockages. Let me know and I can tell you what to look for.

If you get both sides to whistle on their own try uncovering both sides, take a deep breath and blow as hard and fast as you can. You do have to blow hard but when you do it gets quite loud. If it still doesn't whistle their may be something restricting airflow somewhere.

The solution either way may be to try to the print again. But I am happy to help narrow down the issue. "solid_liq" in his comment had success with supports. If bridging is an issue you could try that but it was designed to be within the bridging abilities of most printers.

Hope this helps! Keep me in the loop, I want to get it working for you.

Very nice! Printed mine with PETG. No tape needed, just clean glass.

Thanks for the comment! Its cool that it works on glass I was worried about adhesion so I actually never tried it. Thanks!

Well, my first print I accidentally had supports enabled, doesn't work that way. I reread the instructions and did a print on my glass bed (with tape) with no supports or raft. It's a pretty loud whistle. I have an emergency camping one and it's at least as loud as that.

non funziona .

jzisa - in reply to jument

Sorry you seem to be having trouble. What was the problem you had?

In the mean time here are some printing tips I should have mentioned.
1 Be sure the slicer is set to inches.
2 Use tape on the printer bed if at all possible.

Also keep in mind the whistle is not a gentle whistle should be blown hard and fast for best results.