Jcb's Quad copter Project,

[Ricardoco]

Did you find out what caused the Yaw?? I suspect it was just a balance thing..

Rick

[jcb121]

no idea, I might just try flipping the yaw gryo and see if that helps.

it really was a spinning death trap when it took off!

could anyone on here help me with my multi-wii board? I've never used anything like it before and don't want to mess it up. documentation on my exact board isn't exactly easy to find either :(

[r0bsk1]

I dont have the multiwii, i have the APM2 but the yawing sounds like you have a motor reversed. Have you checked them?

[jcb121]

all the props were in the correct place, maybe one motor had the prop facing the correct way but the motor spinning the opposite way. but it did fly level and I imagine it wouldn't if a prop was forcing air in the wrong direction.

So i conclude that it must be a gyro thing.

[r0bsk1]

Yep if you get an upward thrust of air it'll instantly want to flip on take off as that corner is forced in to the ground where as the other 3 want to lift.

Do you have a magnetometer? That can cause yawing if not calibrated.

[jcb121]

no I don't think so, I'm currently using a simple kk 5.5 blackboard.

[Ricardoco]

no I don't think so, I'm currently using a simple kk 5.5 blackboard.

Im still convinced its a balance thing, i realise you have the same things on each spar but they must be in exactly the same position on each spar, if one of those boards on the side is 5mm out towards the rotor and the opposit one is 5mm towards the center thats a total of 10mm out and although the gyro will compensate to some extent i suspect it would be a little too much and you would be on the limit of your stick all the time with the gyro doing backflips trying to work out what is going on, remember that is still a light craft and the smallest imbalance could make a very big difference.. IMO that is

Rick

[Clive S]

Hi I am not an expert on these but if you have a look at this it shows how you can fly it on a string indoors and be able to calabrate it quite easy without it crashing This is the way I did it to learn what the controls did and make sure the self level worked ok etc . I think the one in the vid is x config. Clive