Terminal Velocity does NOT rely totally on mass.
lol, terminal velocity has everything to do with mass!
normally, in level flight, drag = thrust, at terminal velocity, drag = weight. Typically, at terminal velocity, the prop produces no thrust but an excess amount of drag.
(Remember the 2 cannonball test from the tower in Pisa as well as the feather and hammer on the moon, - remember Newton)
double LOL. That is NOT mass, that is DENSITY!
But the feather and hammer is a good point, but not on the moon where there is no air resistance. The heavier object WILL fall faster if the air resistance is in a non-negligable ratio to weight. Sure, if you drop a 1 lb bowling ball and a 10 lb bowling ball where air resistance is .00001 ounce, sure, you will not notice a difference. But if air resistance was at 1 lb, perhaps like tying the same size parachute to each, the heavier object WILL fall faster.
Such is terminal velocity, at very high speeds just think of the drag created by the airframe as a small parachute.
Not sure if there is a crossing point, but if it is, it is not at top speed.
usually at best climb speed, for the spit 1, it is 140 mph, the 109 is 155 mph. You will not that the climb speed in the spit is given as 170 mph, this IS NOT the best climb speed, 140 mph was found to be too slow for controlability and for cooling in the radiator.
if we can find out the root cause of the Fw's low-speed handling/spin and acceleration woes
it's in the stall speed, plain and simple. Test it yourself. Take a 190 and decelerate while keeping the climb rate close to 0, and find out the speed where you can no longer keep a 0 climb rate. Then try it with a P-51, they should have just about the same stall speed. Then try it with a Spit, there shouldn't be more than a 10-15 mph difference. Fixing the stall speed in the 190 will fix most all it's problems.
As for the acceleration, you have to go way back here:
http://homepage.eircom.net/~frontacs/WBStored/Engines.htmlThe 190 could produce up to 300lbs of exhaust thrust to give you an idea of how significant it could be to top speed.
One big benefit of the mechanically driven supercharger is that the exhaust can be used to augment thrust. Trust me, this is a much bigger deal than it sounds. It doesn't give much of a performance boost to low end acceleration or climb, but it does have a big effect on top speed.
hmm, let's see, 300lbs of exhaust thrust at top end, but "doesn't give a performance boost to low end acceleration" . . .
geez, umm, let me guess, exhaust thrust is added at the top end of the 190 which means it nerfs the low end performance . . . and since there is no exhaust thrust figures given on the Spit or the Pony, it's not included. jeebus crispus, talking about "cheary" picking the data.