4.10 Support & Bug Reporting

[ElAurens]

The Spit is not alone in this, it seems almost all fighters I have flown since 4.10 now need large ammounts of down trim to fly level.

[Klaus]

To fly level it's not a problem.

But it's impossible to trim the direction to fly correctly: if you trim the direction to conter the propeller tork, you fly horizontaly but in fact you turn to the left. In fact, you must fly 20° bank right to fly at the constant heading...

Not realistic !!!

[Tempest123]

Originally Posted by ElAurens

The Spit is not alone in this, it seems almost all fighters I have flown since 4.10 now need large amounts of down trim to fly level.

I have only found this with the spitfire, it needs too much downward trim to maintain level flight, other planes seem to be okay. Keep in mind that as speed increases so does lift, so all aircraft will have a tendency to climb as speed goes up. Aircraft like biplanes and i-16 etc. without elevator trim will need forward pressure on the stick the faster they go. AFAIK most flight models where untouched from 4.09 (except for spits and new planes).

Originally Posted by Klaus

To fly level it's not a problem.

But it's impossible to trim the direction to fly correctly: if you trim the direction to conter the propeller tork, you fly horizontaly but in fact you turn to the left. In fact, you must fly 20° bank right to fly at the constant heading...

Not realistic !!!

The spitfire, like the 109, doesn't have aileron trim, so counteracting the torque must be done "manually", i.e with the stick. If rudder trim is used, then yes, the plane will skid to one side, and you will need to counteract with aileron (bank), but rudder trim should not be used much after takeoff. The problem i see with the spitfire FM is that too much downward elevator trim is needed, so much so that the elevator is visibly in a downward position all the time.

[F19_Klunk]

edited by myself

[JtD]

Originally Posted by Tempest123

...The problem i see with the spitfire FM is that too much downward elevator trim is needed, so much so that the elevator is visibly in a downward position all the time.

Spitfire V was tested by NACA to be in neutral level flight with ~4° downward elevator for much of the speed range. How is it in game?

[Tempest123]

Originally Posted by JtD

Spitfire V was tested by NACA to be in neutral level flight with ~4° downward elevator for much of the speed range. How is it in game?

Hmm, well that sounds about right then. It has a large wing and a lower aspect ratio than a 109 say, so it probably creates a lot of lift, perhaps it is correct. I'll have to research this some more, it's flies fine in Il2, just noticed that since 4.09, it requires more downward trim, doesn't affect it adversely though .

Edit: Yes I just read the NACA report (below) it does indicate about a maximum of about 4 degrees nose heavy trim in cruise flight, and sensitive elevators, so I think DT got the FM right. Just need to fix the Vc cockpit bug

Spit V NACA test
http://mitglied.lycos.de/luftwaffe1/...pit_flying.pdf