Comment by Stefano on March 4, 2009 at 10:47am

Hola Jose,
perhaps a silly question: are you planning to use the folding arm to actively control the trim of your heli or are they just for transportation purpose?

Thx
Stefano

Comment by Jose Luis Cortes on March 4, 2009 at 10:58am

Hi Stefano, no!, arms are not controlled!, only for transportation
jlcortex
nMine.com

Comment by Peter Seddon on March 4, 2009 at 11:16am

Using an even number of motors (especially 4 or 8) it is easy to see how to control such a 'copter as they work in pairs and counter rotate. I have a problem with 6motors. Can you tell me how you control pitch, yaw and roll?

Peter

Comment by xemone on March 6, 2009 at 4:01pm

Yeah this does remind me of the X6 but it's better because the camera design seems to be integrated into the airframe vs. hanging from the underside. I read this thread http://diydrones.com/profiles/blogs/bidireccional-rc-transmitter?id=705844%3ABlogPost%3A61548&page=1 and I think both your idea and the other could greatly compliment each other. What do you think?
I wrote this in another thread
I wish guys like you (guys with the technical know how) could work together, design and build a modular UAV. Have the MCU/DSP and all the sensors on the main board. Have the motor controllers separate from the main board so anyone can use different size motors (scalability). One can build a 10inch wide quad or tri- rotor or a 3 or 4 foot wide version.
Another option is a board with everything except the MCU/DSP/CPU board. This should include the sensors, servo controllers, FPGA et.c that can be controlled over USB by a gumstix module or some other powerful module (or even a pico ITX motherboard). Coupled with a controller like your idea. Anyone can make anything out of it. I'm sure the software developers out here can cook up something modular to handle all the stuff.

What d''you guys think?

Comment by Thomas Bögel on March 7, 2009 at 3:51am

@xemone:

But there already is such a system (more than one, in fact):
Both the Mikrokopter and the Armokopter consist of one PCB for sensors and controller, and have separate BLCs (in case of the Armokopter even off-the-shelf china BLCs that have to be reprogrammed, though). They both go all the way including compas and GPS (if you want), have telemetry downlink and i.e. GPS waypoint uplink. The MK supports up to 8, the Armo up to 12 (or 16?) motor concepts.

Frames are modular also (for some reason I tend to recommend the Bogoframes... but there are also others, like Q4 and Powerframe), with one core module and arms in different lengths.

Comment by marc dreffke on June 7, 2009 at 10:28am

How is this project going so far?

Comment by Thomas Bögel on June 7, 2009 at 1:27pm

Well, mine is finished ad flies great so far. I do need to fiddle with the parameters a bit, and GPS is not installed yet (I need do calibrate the compass again and did not have the time do to so yet - due to bad weather mostly).

Comment by Jose Luis Cortes on June 7, 2009 at 1:35pm

It is great!!! which controller are you using?

Comment by Thomas Bögel on June 7, 2009 at 1:36pm

As you can see, I didn't quite follow Jose's design. I do have some experience with sheet material frames, and this size would mean that there is a substantial amount of vibration from the motors.
So I went with the standard centerplates -and-aluminium approach.
The milled parts where done by a friend. The glowing stuff is basically makrolon (polycarbonate) with those self adhesive LED stripes inside.

As for the technical data:
Mass: 980g (1100g including the camera)
Akku: 3s 2300mAh 10C Wanma (Hellpower)
Hovering current: ~13A
Hovering power: 133W ohne Kamera (about 7,5g/W - 10g/W is my goal)
Motors: 3x AHM 23-10 0,47mm² wire on top and 3x AHM 23-10 0,53mm² at the bottom
Camera: Pentax Optio S7. This can be triggered using an IR-LED
Frame: Y6 Fold-Down by Dukedolphin (thank's, Duke!)
Cameramount: by PhilSU

Takedown or build-up takes well under 30seconds - it is just 3 screws plus the plug-in antenna.
Hook up the battery and go.

Comment by Thomas Bögel on June 7, 2009 at 1:40pm

Oh, almost forgot:
I am using the Armokopter board on this one.
BLCs are from hobbycity. I won't use those again - they are cheap ($13 each), but quite pooly done. One needs to remove the BEC-parts and reroute 2 signals to the Atmel. I did 8 so far, and I have a bout 1.5oz worth of surplus solder!

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