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exosequitur

Javelin Giant Glider .38 Meters

by exosequitur May 17, 2013
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Printed one in red hatchbox abs. .5mm nozzle with a .35mm layer height. Flies well even launched by hand. Nice job!

Printed one in PLA following instructions exactly. Cog at dead wing center, so some weight at nose may be needed. I tried fo fly it with a small slingshot. It flew well for a few feet then landed. Obviously the slingshot is way underpowered. This thing takes a weapon grade rubber launcher and I don't think launching by one hand is possible. And it will be dangerous with that much kinetic energy being carried. I don't think I'll ever launch it in fear of litigation.

I used to make similar in size and length out of balsa wood. 12-14 average sized rubber bands daisy-chained together then secured by a tent peg in the ground make for a very good long distance launcher. Used to have mine with plane set to climb slightly and turn right.Used to get a good 50-100 feet away whilst looping back round towards the launch point

I Made one. Flight good. My son find it great.

I made one and it was slightly nose heavy so i modified it by putting a spare rocket fin on the underside to help with stability and to locate the cg in the correct place. It took me around 4 hours to print and build on my Printerbot simple metal at 75% scale. Thanks for the design.

Could you split all the parts of the fuselage kit? I need some of the minor parts only.

Can It be printed with PLA instead of ABS ?

check out http://www.thingiverse.com/make:38748http://www.thingiverse.com/mak..., looks like it worked for him. Not sure where the CG would end up at 15% fill, but you can always add weight if needed. The CG should be at or (<10mm) foreward of mid-wing, if the plane acts erraticly it is probably because the CG is too far aft, making it unstable.

Javelin Giant Glider .38 Meters
by Yoniweb

Possibly, especially with some of the less brittle types. You will need to find a glue that works well to assemble it, and it will end up a little bit heavier.

Ok thanks! I'll try it out.

Why is everything always printed in ABS ? I would think PLA has so many advantages (more precise parts, lower temperature printing, no toxic gases, etc.) ?

ive been experimenting with PLA, especialy witht he more flexible types. One of the problems I have encountered is the wide variation in PLA and the brtittleness , weight, and difficult gluing. ABS seems to be a little more uniform across suppliers, and is easier to tune for smooth membrane prints.

I've been using PLA from Ultimachine for almost two years now. It's some pretty tough stuff.

Would it also be possible to print on 0.3mm layers?

I think you might have some weight and structural issues on .30, as the minimum solid thickness (2 layers is required for strength) would be doubled.

Ok clear, I have been experimenting with printing 0.125mm layer height, and worked so 0.15mm should be doable also.

Takes 3 hours per wing in this layer height. How long did your printing take?

About 50 minutes a wing, like 1350 mm (3mm dia) of filament each. I print at 60 to 70 mm/sec on marlin firmware.

Damn.. I need to get rid of this crappy Reprap Air and build a grown-up machine pfffff

This is what I've been waiting for! :D

Yeshhhhhh <3

Today I went to the park to shoot my Monarch, Sparrow and Strator, but this is what I wanted, bigger! :)