investigating Severe Yaw Oscillation at Mach 0.8 at Low Level

[Ogata_Rina]

Fuel is at about 2500lbs

one cheek station loaded TGP, other pylons are empty.

This can be induced by kicking rudder left and right at a specific frequency, looks like the damping coefficient is far off.

Track:

 

yawf16.trk

[BIGNEWY]

Hello,

 

do you have any information that it is incorrect or is it just a feeling?

 

thanks

[Ogata_Rina]

Near at the end it just enters a violent oscillation that I have to kick rudder again to exit it. And it's not documented on haf cj50 flight characteristics, so guess it's incorrect?

[Ogata_Rina]

Please check with your team members and SMEs. Certainly this isn't normal for normal airplanes.

[cofcorpse]

The following maneuvers are prohibited:

-Repeated maximum rudder reversals.

-Rapid rudder release or reversal above 300 knots/0.6 mach

 

So, it seems, that you are executing prohibited maneuvers.

[Ogata_Rina]

Ah then it makes sense. Thanks.

[SCPanda]

17 minutes ago, goAdA said:

Ah then it makes sense. Thanks.

Yeah, I heard the F-16's flight control system automatically gives you proper rudder input so realistically pilots don't really use the rudder in flights.