How can I level a Bixler using APM1?

I've got a bixler and have installed an APM1.4 with v2.40, GPS, magnetometer, xbee and everything is working great but in stable mode it climbs at like a 20 degree angle. In manual it's ok. I'm sure this is because when I did the manual level (I'm not using the auto level at each boot) I just put it on the ground and made sure the wings were level but apparently the pitch is not level by just sitting it on level ground.

How should I level it before pressing the leveling command in the planner? It seems I would need to raise the tail up about an inch off the ground but is that normally necessary? I know the elevator trim is ok because in manual mode it's all trimmed out but when I switch to stable it thinks it's pitched down so gives some up elevator.

So what is the proper way to find the level point?

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Replies

  • When you say servo push rods are you referring to the rudder and elevator servos on the side? That control rod should be parallel to the ground to be level? Mow i see why it seemed nose light.
  • Moderator
    Or best is if you have built a CG rig, put the wings on the posts and balance at the wing spar, or about 70mm from the leading edge. Some say at 60, some at 75mm. A little nose heavy is better than tail heavy, for early flights.
  • Moderator
    Level based on the servo pushrod slots along the side of the fuselage.
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