Dutch roll

[Up&Away]

Can anyone tell me what a "dutch roll" is?:)

[Sabrejock]

It isn't a manouver. My understanding is that is an instability, usually in swept wing aircraft which is characterized by simultanious roll and yaw. The tail of the plane would describe a horizontal figure "8" throughout this repetive process.

I think the DC-8 was noted for this, so you didn't want a seat way in the back. Of course modern stability systems have virtually eliminated this motion. Tex.

[Norm]

I believe Sabrejock is correct that the instability of some aircraft was refered to as Dutch Roll. But I was also taught what was called a Dutch Roll and it was a lot of fun, but doubt you can do it with a model.

What I was taught was to roll the plane back and forth from 60 degrees left bank to 60 degrees right bank while keeping the nose pointed directly at some object. This requires a constant varience in cross controlling between rudder and ailerons, with constant changes in elevator control at the same time. I used to try this a little with models, but there is no way to know that you're keeping the nose pointed directly at some object.

Norm

[bipeflyer]

It is possible for models to exhibit this phenomenon,I had a Mirage 5 (I.C.D.F) a few years back,and at high AOA on landing for example,it would more often than not,dutch roll.
Not really too sure why this occured,obviosly a delta wing was contributing in some way.I guess a gyro would have corrected it.

Matt.