I did a few Modifications to the origial OpenRC Quadrocopter:
1) The ESC of the E310-Set from DJI do not fit inside the arms, i could not find smaller ones from DIJ. but anyway once i removed its housing and widened the compartment within the arms i was able to fit them with a few modifications.
2) he battery can only be 18mm of hight, ive trouble finding such a small 4s or 3s LiPo so i increased the height to 29mm (since i got a 4s which will fit now ;) and removed some unnesesary material to save some weight. i can easily provide other heights
3) I increased the thickness of the Body Upper part by 3mm, to gain some more space for the MC and stability for the Arms
4) I hollowed out the cover, save some weight and gains more space, for electronics and cables...
so far printed but untested modifications, all WIP
I also added the two parts which i did not need modify (yet), just to have it complete.
As a remark i probably will come up with a different kind of Battery Compertment door, since i think it will not stay in place during flight, the battery will simply push it out if its not locked by some kind of mechanism. just a thought
I changed my mind. i made a minimalized version of a battery holder, lower weight and easier to change, not so bulky. but thats my taste, you dont need to like it ;)
added an other Top Cover only 69g now and more space.
probabply i will fit an Ardupilot2.6 just to try it out. its inexpensive (70-80euros including all sensors, gps and compass)
Naza v2 would probabpyl the best choice but it costs at least 3x as much
05-25-2015 i modified the arms a little bit, there was a wall which was too thin for my printer to print, fixed that now
06-21-2015 completetd setup using an APM 2.6 with horizontal connections mounted on a vibration dampening holder i designed, see pictures
total liftoff weight is 1370g including LiPo (3S@3300mAh)
maiden flight: https://youtu.be/tzJst6SCLPQ
2nd flight: https://youtu.be/d-n4VynWJZc
07-13-2015 check some more videos on youtube
i recommend using 4S Lipo (~3200mAh) and CFK Props
if you need GPS than you should look for an ublox neo-M8M chipset
the ubox-M6M is to slow (only 1Hz updaterate) thats not enought for good PosHold. the M8M has 5Hz updaterate
APM (sidebended!!!): http://www.ebay.de/itm/251983102895
Power Module: http://www.ebay.de/itm/281228500292
screws, nuts washers etc as needed
these are only reccomandations of what i used and tested. other combinations might work too. its entierly up to you !!!
check the OpenRC googlegroup for more cool stuff ;)
i printed the parts on a Replicator2x in ABS
Arms, Body up and low with 2shells and 50% infill for stability (30% might do as well)
Top Cover and Battery Compartment 2 shells and 10% infill
for all i enabled support and set bridging on true, otherwise it would
use to little support.support density to 0.15.
Extrusion speed 70mm/s and movement 100mm/s
But you can play around with that.
For my new Battery holder i used 3shells and 70% infill, since its very thin i wanted it stable, it has to hold at least 300g LiPo
here some metrics:
Top Cover 84g
Top Cover v2 69g
Body up 53g
Body low 69g
Arm pp 75g (x4)
(Battery Comp standard 98g)
Battery Comp minimal 62g
Motors, ESC, Cables pp 93g (x4)
Battery 3S 285
suggested liftoff weight per motor (3S) 350g x4 = 1400g
so its just within the range. using a 4S LiPo it would be 1600g
but the 4S LiPo then is 350g
im using this Motors/ESC combination:
after all i did not use the NAZA v2, im using now an APM 2.6 with everything it'll give a total weight of 1370g