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Scratch build planes keeps twisting side ways

Dude

Junior Member
#1
Hi to all,

I have been doing a couple of scratch builds and I have been having an issue that they twist side ways as if they had a rudder(which they dont), it keeps going into circles and into the floor. The planes have been check for the CG and it is ok but still, when i hand launch it it twists out of control. Any recommendations?
 

pgerts

Old age member
Mentor
#3
Picture of the plane? Or link to drawing? Best of all a movie.
Twist - is it yaw or roll?
Circles - is it rolling or flat spins?
 

bicyclemonkey

Flying Derp
Mentor
#4
You mention that it's when you hand launch it, it twists out of control...As in a torque roll to the left from too much motor? I have some small foamie warbirds that veer to the left when I hand launch them.
 

Dude

Junior Member
#5
no i dont have a video. It twists as in yawn. Not roll. I also thought it could be to much torque but even at half stick it spins Twisting.JPG
 

FlyingMonkey

Stuck in Sunny FL
Staff member
Admin
#7
The obvious answer is that you could have the vertical stabilizer attached slightly crooked, or it has a slight warp in it.

You could have the plane slightly off balance on the side it turns towards.

You could have too much right thrust in your motor.

Those are the three guesses I have without seeing the plane or it's flights.
 

Dude

Junior Member
#13
Yes a small fin, i will re assemble it with the information provided. Thanks alot everyone! It has been of great help!!! When i assembled it the first time i didnt take under consideration so many details