Jenny xl
- Thread starter Rolierc
- Start date
Thank you for reply. I learned that the p factor has a lot to do with it the opposite reaction of the the prop I noticed Josh Bixler said he had to add a chunk of rudder trim because of the p factor right rudder because the plane naturally wants to yaw left. But I also noticed the tail was not straight and I didn't have it supported so the tail was leaning to one side
Piotrsko
Legendary member
Need a bunch of right thrust. ( couple of washers under engine mount so it faces right noticeably) still will attempt ground loop if you slam on full throttle from a stopped condition.
Both wings should be the same amount of straight relevant to flight, generally the upper one needs to have a popsicle stick at the trailing edge so it stalls last. Stops the death dive sinto dirt mostly.
Rudder angle doesn't do much other than look bad, but not facing the flight path causes it to turn. if the elevator was crooked also then you get rudder effect pulling up. Look at V tails. I suspect you stalled and P factor spun you but it could have also only stalled on the inbound wing if it's crooked....
Jennies were also known to be a handful on the ground because of teensie rudder syndrome. They had a skid to help keep the nose pointed the right way.
Finally, work your way to first flight by adding power in small increments. Handling issues will show problems you have in flight. Don't want to be on the sticks hard and fast while figuring out how it handles
Both wings should be the same amount of straight relevant to flight, generally the upper one needs to have a popsicle stick at the trailing edge so it stalls last. Stops the death dive sinto dirt mostly.
Rudder angle doesn't do much other than look bad, but not facing the flight path causes it to turn. if the elevator was crooked also then you get rudder effect pulling up. Look at V tails. I suspect you stalled and P factor spun you but it could have also only stalled on the inbound wing if it's crooked....
Jennies were also known to be a handful on the ground because of teensie rudder syndrome. They had a skid to help keep the nose pointed the right way.
Finally, work your way to first flight by adding power in small increments. Handling issues will show problems you have in flight. Don't want to be on the sticks hard and fast while figuring out how it handles
Last edited:
quorneng
Master member
Rollerc
To be exact the P factor is a yaw effect when the air stream approaching the prop at an angle. Tail dragger on take off?
Once in the air flying it is the motor torque you have to be aware of. The corrective effect of the right thrust does depend on the flying speed. The right thrust may not be adequate for full throttle and a slow climb away after take off. If you are not expecting the torque left roll and instinctively put on too much right stick you are well on the way to inducing a spin!
The Jenny XL is a slow flying plane. The difference between "just fast enough" and "approaching the stall" is not that great to the RC pilot on the ground.
I am pretty sure the full size needed the same care and attention to speed just after take off.
I hope this helps.
To be exact the P factor is a yaw effect when the air stream approaching the prop at an angle. Tail dragger on take off?
Once in the air flying it is the motor torque you have to be aware of. The corrective effect of the right thrust does depend on the flying speed. The right thrust may not be adequate for full throttle and a slow climb away after take off. If you are not expecting the torque left roll and instinctively put on too much right stick you are well on the way to inducing a spin!
The Jenny XL is a slow flying plane. The difference between "just fast enough" and "approaching the stall" is not that great to the RC pilot on the ground.
I am pretty sure the full size needed the same care and attention to speed just after take off.
I hope this helps.
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