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Old Mar 29, 2012, 12:20 AM
Registered User
Joined Dec 2011
6 Posts
Help!
Noob with Witespy issues after just 2 flights, NEED HELP

Ok, I posted this 2 days ago (I though) but I came back to see responses and it doesnt show that I posted it.

got my witespy (batteries, radio, charger, all from Paul), did a bunch of sim, was ready to go out and fly. here is what happened.

flight 1) one the first battery, everything was fine, very simple flying a few bumps along the way. when the battery went out and I change it to battery #2 I just tapped on the throttle and it rolled over on its side breaking 1 prop.

flight 2) a few weeks later, had to order props. battery #1, no real issues, the quad seemed not nearly as balanced and stable with the new props. ran the battery out with short low test flights. On battery #2, just tapped the throttle and the copter rolled backwards onto it's top. did it again to test, same result, held It over my head and touched on the throttle, I could feel it torque backwards like crazy. It seems that the front two props are getting all the power.

I'm not 100% sure it happened on the same battery both times but what else could be causing this?

I have done a balanced charge every time and dont' know what else could be causing this

once this problem is solved (hopefully easily) how do I re balance the quad to be as stable as the first flight? right now it is always tilting forward, when it's not flipping over backwards.

thanks in advance for any help
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Old Mar 29, 2012, 11:31 AM
Live to ride... and fly!
Tres Wright's Avatar
Forney, TX
Joined Mar 2002
15,165 Posts
The vibrations may be due to out-of-balance props. Quad props really need to be balanced using a magnetic balancer. Order plenty of extra props, you'll go through a bunch learning to fly a quad. Make sure you get the correct rotation prop on the correct motor.

I don't know why, but sometimes when I arm my MultiWii-based quad it'll do what you described (try to flip on take-off, two motors revving higher than the other two). When it does it I unplug the battery and plug it back in making sure the quad is nice and level when I do so, and it's fine after that.
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Old Mar 29, 2012, 11:49 AM
Inverted Electric Flyer
tmproff's Avatar
United States, TX, Humble
Joined Jan 2004
502 Posts
Also, try to get in a habit of calibrating the gyros before each flight. To do this on a multiwii based FC:
While the quad is on the ground, battery plugged in, controller on:
1. left rudder (to unarm the motors)
2. hold down elevator and left rudder
3. you will see a green light on the FC blink a few times
4. right rudder to arm motors
5. throttle up to get quad off the ground.
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