I've been flying the Draganflyer IV for about ten months. As far as I know, the yaw drift is the normal operation of the flyer, but I don't know if it can be compensated for by tweaking one of the pots. I've learned to compensate for it without thinking about it. It's not too bad when you're just flying it around normally, but it does make high bank turns and other hard turning maneuvers practically impossible. To do a bank turn with the draganflyer, similar to a helicopter, you need to yaw into the turn to keep the vehicle pointing forward (which is even worse with the draganflyer because it doesn't have a vertical stab). But, when the draganflyer comes out of the turn you need to throw the rudder in the opposite direction to compensate for the yaw drift, and it's yawing really hard at that point, which makes the maneuver very difficult. In ten months, I have successfully done this... twice.

To see the yaw drift really easily, do this... Put the flyer on a flat, smooth floor, throw the rudder stick to the left and start moving up the throttle to get it spinning as fast as you can without taking off. Then throw the rudder stick right until the flyer stops spinning. Then immediately center the stick. Notice that the flyer will immediately start spinning left again. The only thing you can do about this is hold the stick right for a few more seconds to let the "rudder" come back to zero.

I sure would like to know if there is a way to fix the yaw problem. It's really the only thing I don't like about the draganflyer.

-- Brian Stone