Speed graphs for Spitfire and Hurricane

[klem]

Originally Posted by Buchon

I know that there no Boost button but under a FM coding point of view the boost behavior is equal to WEP.

That´s because you should make overheating and damage for it so the best way is implement it in the code as is done with WEP.

"Boost" is alway present, its the manifold pressure, and is increased and decreased by the movement of the throttle, from below -4lbs (closed throttle) up to + 6 1/4 lbs at full throttle. There is a limit to the time +6 1/4lbs can be used otherwise damage results. This is already coded in.

The problem may be this: if we assume that the gauge reading of +6 1/4lbs is a true value, i.e. it truly represents the maximum manifold pressure, then there is something wrong in the conversion of the boost value to thrust and speed. I don't know how this is coded in CoD but its probably somewhere in the chain of formulas and values that convert throttle position to manifold pressure, manifold pressure to engine power output, rpm setting, propeller/thrust modelling, drag factors, atmospheric pressure, and probably other factors, to arrive at speed.

I assume several of these are the same for both Spitfire and Hurricane (same engine, same propeller) so it could be a common factor (engine modelling) and/or different aerodynamics for the two aircraft (they are both undermodelled at low altitude).