Re: [Paparazzi-devel] Problems with throttle of first Lisa/M craft

[Sergey Krukowski]

The problem could probably be in a too flexible autopilot board mounting.
If it's the case, try not to use too soft rubber (or whatever it is) to  
mount the board.

Best Regards,
Sergey

> Hi
>
> I have built my first paparazzi craft, a hexcopter with a Lisa/M  
> autopilot. However when trying fly it in AP_MODE_ATTITUDE_DIRECT I got a  
> nasty surprise, the throttle did not respond when I turned down the  
> stick.
>
> It had a nice idle throttle when I powered on the craft, with all  
> propellers spinning but not enough lift to do anything. The throttle  
> increased ok when I pulled the stick up. But it did not respond as  
> expected when I turned the stick down. I had assumed it would reduce the  
> throttle to the idle state - instead it had more than enough power to  
> lift with the stick fully down.
>
> I am sure that it looked rather funny when I tried to catch and hold my  
> home built hexacopter without hitting any propeller (I succeeded but  
> could not figure out how to cut the power). But it makes me reluctant to  
> try to fly again since I have zero control of the aircraft.
>
> Any idea why it responded in this way?
>
> Can I analyze the log files to find out what the problem may be? Or do I  
> need to turn on more messages for the next flight?
>
> I have had some trouble getting the flap and gear switches to be  
> transferred from my Spektrum DX6i transmitter, which is one of the  
> reasons I did not have a working kill switch. I will obviously try to  
> fix this before flying again.