Discussions

Hi,

During the last week I've crashed by RC plane following the addition of new motors (2xPlettenberg), new batteries (4x5S, 5000mAh each) and the Atto Pilot 90A sensor, used as a "fuel meter".

Former (and trusted) setup:

2xPlettenberg (26 series, different model than the new ones)

2xCastle Phoenix Edge HV 80

4x4S, 5000mAh batteries, All connected parallel to each other and feed the 2 ESCs

No Atto-Pilot! APM 2.6 powered by its own battery (incl. servos)

New (and crashed) setup:

same series but different models of engines

same ESCs

4x5S, 5000mAh batteries, All connected parallel to each other and feed the 2 ESCs

Atto Pilot 90A connected to A1&A2 connections on the APM on one side and on the feed of only ONE OF THE ESCs on the other side

What happened?

After many static testing, I've gone outside to fly and just as the plane was at the takeoff climb (Manual) the APM had a brown out and my RC plane is done for. When I tried to investigate the reason I found out something interesting:

Having the same Atto Pilot setup, If I disconnect the ESC's GND wire I can still open the throttle and experience operational propulsion! This means the GND from the batteries is connected to the GND of the APM through the Atto Pilot and it completes a cycle with the GND of the throttle channel.

I don't know for certain this is the cause of the  crash so I mean to ask here, Is it possible the APM got a brown out due to propulsion load? Is there a problem with my Atto pilots (I have 2 and experience same problem with both)? Is the problem in my setup?

Yours,

-Yaacov