Parts already purchased are:
ArduIMU mega shield the old version
Ardu Pilot mega
4x SuperTigre 400 class motors here is the specs for it from flybrushless.com.. only 52 grams :D
4x 10 by 3.8 props (pusher/puller) (9x3.8 is ideal but I cant find the pushers anywhere!! )
: DX7 Tx and AR7000 Rx
Parts yet to be brought:
4x speed controllers - pretty easy to get them, but Question is, Do all 4 speed controllers have to be the same? my reasoning is that since all the ESCs are standardized to work with hobby Rx would it really matter if they are the same?? I'm probably wrong but is my reasoning correct?( because of stock issues locally, I might have to order online.. and shipping is a pain)
Battery- I want to get about 20 mins of flight time, the weight is somewhere around 1200g, so going with 400g max thrust on each motor, about 1600g thrust which draws about 6.5 amps each.
If I go with a 2200mAh battery thats a approximate flight time of 0.08 hours (2200/26000) but of course this is an over estimation. Also weight is a factor, bigger batteries are heavier so, looking to go with a 4000mAh battery that weighs about 340gs. Anyone has any tips on battery selection?
Magnometer - the 5v regulated one was out of stock, the ones I can find are 3.3V (the ones at sparkfun) so can I still use it with the arduIMU mega as described in the build logs, but I have to provide a 3.3V source for the Magmeter?
The Frame build
We are using aluminum tubes and aluminum sheets to start the build, probably move to carbon fiber tubes later. Here is the awesome part, we have access to a 3d printer, so we are printing the motor mounts and the stackable modules. have to see how the weight on these parts are like, hopefully its not too heavy.
also building our own power distribution board, just like the one available on the Arducopter project.
looking forward to your comments and Guidance
Pictures as we build, post I will