TL;DR - vibration problems solved. Look out for new 250 sized APM quads from onDrone.com soon
Well it is confirmed - I have the 250quad bug that seems to be going around at the moment. After building so many big and stable multi-rotors these seem like too much fun. All the APM Arducopter goodness we know and love but in a bite-size go anywhere package. This just opens up a whole new world of possibilities. It also makes for some great FPV flying, ACRO practice and some of those missions you perhaps dont want to risk on the bigger frames.
The first few prototypes suffered the usual small frame problem - vibrations. Stabilize was acceptable but the graphs were way too "hairy". ALT_HOLD and LOITER were horrible as expected. Quad would shoot up 2-3m when ALT_HOLD engaged. Then the version 3 frames arrived with a "clean-dirty" separation. It made all the difference. ALT_HOLD and LOITER instantly became rock solid. AUTO_TUNE did its little dance.
v3 frame with "clean-dirty" vibration isolation:
v2 frame - no vibration isolation:-
(note slight difference in scale)
Specifications of model shown:
- 250 FPVv3 frame
- ArduFlyer 2.5.2 (arducopter v3.1.5)
- u-blox LEA-6H GPS and MAG
- 4x RCTimer 1806 2300KV motor
- 4x 12A ESC SimonK
- 4x 5" carbon prop
- Imago Cobra FPV camera controlled via FrSky channel 8
- 200mW 5.8G AV transmitter
- FrSky X8R 8 channel receiver
- APM power module
- Circular polarized antenna RP-SMA
- AUW without LiPo = 557g
- AUW with 1800mAh 3S = 705g
We should have some ReadyToFly packages of this available in a few weeks at www.ondrone.com
Get in touch if you want more info or a place on the pre-order list
Photo from onboard Imago Cobra HD FPV camera. Switch between video and photo modes remotely.