109 rudder right-left

[9.JG27 DavidRed]

i know that was asked a couple of times already, but i cant remember it being answered at all..so, except for take-offs, wasnt the 109 known to need much left rudder? there was even the saying that 109 pilots needed a longer left foot..and i guess that didnt come out of nowhere...in dcs its the opposite.

[Anatoli-Kagari9]

Actually, just as any prop with CW rotating prop the use of right rudder is normal / expected on takeoff and high power / low speed / high AoA situations, and in a powerful 109 k4, even taking off with power set at just 1,35 ATA will require a "lot" of right rudder too in DCS, but what I ever hear / read about was the need for LEFT rudder in cruise, and that is why the 109 pilots were said to have a longer left leg.

 

That is due to the "overcompensation" at higher speeds / lower AoA of the tail vertical fin + rudder profile, which is not symmetrical, creating a right yaw at higher power settings / AoA / lower speeds to counter the prop torque / slipstream and p-factor effects, which is no longer required at higher speeds / lower AoAs as in cruise or high speed dives / maneuvering.

Edited January 14, 2017 by jcomm

[Yo-Yo]

Actually, just as any prop with CW rotating prop the use of right rudder is normal / expected on takeoff and high power / low speed / high AoA situations, and in a powerful 109 k4, even taking off with power set at just 1,35 ATA will require a "lot" of right rudder too in DCS, but what I ever hear / read about was the need for LEFT rudder in cruise, and that is why the 109 pilots were said to have a longer left leg.

 

That is due to the "overcompensation" at higher speeds / lower AoA of the tail vertical fin + rudder profile, which is not symmetrical, creating a right yaw at higher power settings / AoA / lower speeds to counter the prop torque / slipstream and p-factor effects, which is no longer required at higher speeds / lower AoAs as in cruise or high speed dives / maneuvering.

 

Fin and trim tab was designed to have zero pedal forces at cruise. Left rudder is more relevant to dives.

[rel4y]

The ground adjustable rudder/aileron trim tab is a feature I value very highly in DCS. I can fly perfectly hands & feet off at my preferred power settings after careful adjustment.