[Tempest123]

Just a flying note for people citing the downward trim needed on a spitfire to fly level:

-Airfoils gain lift the faster they travel through the air (this is how an airplane is able to take off in the first place), how much lift is based on a number of things including the type of airfoil and shape and area of the wings

-The faster an airplane goes, the more it wants to climb, and the more downward trim is necessary to take the pressure off the control column. (to a point, at very high speeds, shock waves form and this is different, but this is beyond "normal" flight speeds, and usually occurs to piston aircraft only in a dive, and depends on the airfoil shape, ex. p-38.)

-As an airplane slows down, the opposite is true, thus more back pressure is needed, and thus nose up trim.

-As such an airplane in high speed level flight has a nose level angle depending on the aircraft, and in slow level flight an aircraft has a nose up angle. The slower an aircraft travels (i.e the lower the thrust), the greater the Angle of Attack its wings need to hit the air to maintain the same lift and level flight. The Angle of Attack can only be increased to a certain point, beyond that the air separates from the airfoil, becomes turbulent and the wing stalls, no matter what the speed. This is why you can stall a P-51 in a high speed turn (maximum AoA exceeded), do a "snap roll" in a Fw-190, and also the reason the 109 has slats (to keep the air from separating away from the wing surface, thus delaying a stall).

-Many computer simulations don't model this correctly, or if they do it is at least partially. In cruise flight, each change in power setting requires re-trimming the aircraft to relieve the control forces.

-The behavior of the spitfire is normal, and surprisingly, this should also be the case with most of the other planes in the game. An aircraft can fly level at a range of attitudes depending upon its speed.