Ive gotten thru the trainer stage and it's on to my second plane. It's a 4th hand Rascal in which Ive put my old OS40 LA.

The CG is spot on and all control surfaces have the proper throws. I have both down thrust and 2 Deg right thrust on the engine. Its not a barn burner but does well in takeoffs, rolls etc.

However, in turns it sometimes refuses to turn and wants to fly sideways. It a word, its Yaw infected.

Is my setup wrong or do I just have to go to Rudder School to get thru my turns.

Appreciate your help.

Bob

Yes, go to rudder school, and take a refresher course.
Most planes with little dihedral, and a low wing will just yaw when rudder is applied, however the "Rascal" you speak of is a cabin type high winger, yes?
Check for proper dihedral, and rudder throw, and perhaps move the C of G back just a bit.
Are you just stuffing in some rudder, and expecting it to turn instantly? You may just need to be a little more patient, feed in the rudder, and wait for a second or so. My G.P. Spirit glider take a second or so to react, and if you just hit the rudder for a second, it to will just swing the tail over, then it swings right back.

it might also be from the aileron differentials.
more noticeable on high wing mount planes.
there's a couple of theads that goes into details..but i can't remember where.

in other words... the ailerons are set too low.
they'll act like air breaks, cuasing yaw.

havn't experience myself, but a bubby of mine was
having semilar problems on an under power bird.
he fixed it by raising the ailerons.

Leftnut is speaking of "adverse yaw" and that's when the down moving aileron causes enough lift (and therefore drag) to pull the plane 'round the other way from the turn input.

Nothing to do with the plane just yawing and not turning.

Aileron differential is done to counteract adverse yaw, by setting the ailerons so the upgoing one moves up more than the downgoing one moves down.

That's not the problem here though.

If the "not turning" problem is worse in one direction, you may have too much, or too little engine side-thrust. You may also have a misaligned fin/rudder assembly, or the wings may not be on square, or they may be tilted, or there may be insufficient aileron authority -- or all of the above.

In any case, use your rudder.

Actually Jetts, from the way I'm reading his post, it could be adverse yaw. He says, "it sometimes refuses to turn and wants to fly sideways". If this happens when he applies ailerons, say for a left turn, and the nose moves a bit towards the right, it could appear to be flying "sideways".

Bob,
Are your ailerons set up so that there's more up than down?
Dennis-

Sorry, I was taking it to say when he used the rudder, it wouldn't turn. Please clarify for us will ya Bob.
Thanks.

Is the airplane actually banking while it slips sideways, or just slipping sideways without banking? The Rascal has a powerfull enough rudder to overcome the alierons and turn the plane flat.

Andy

First, thanks for the input. Hadnt thought or understood adverse yaw.

Second, I am talking about aileron turns and the plane just wants to keep going in a straight line.

Not sure how to set differential in ailerons. I assume its EPA on my Tx.

Thanks again.

Bob

If you have a single aileron servo you offset the control rods in the servo "horns" so that thye deflect more up than down. If you have two servos on separate channels and a computer radio you can do it in the transmiter with end point adjustments.

Sorry for the crude sketch, but you should be able to figure it out from there.
Dennis-