Lack of speed in the Pony? You are kidding right? The AH Pony is fast. It's realistically fast. It also handles best at high speeds.
There are folks flying this game that know the what the real P51 was capable of. Trust me, if it was even 5 mph slower than it should be, you would not be able to read this board without hearing about it.

AH has to have one of the most accurate flight models for the P-51 available anywhere.
Remember, speed does not mean accelleration. The pony is fast, not quick. It does not accellerate particularly well. However, if you fly it properly and keep it above 250 Mph at all times, it can be almost untouchable.
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Lephturn - Chief Trainer
A member of The Flying Pigs
http://www.flyingpigs.com "A pig is a jolly companion, Boar, sow, barrow, or gilt --
A pig is a pal, who'll boost your morale, Though mountains may topple and tilt.
When they've blackballed, bamboozled, and burned you, When they've turned on you, Tory and Whig,
Though you may be thrown over by Tabby and Rover, You'll never go wrong with a pig, a pig,
You'll never go wrong with a pig!" -- Thomas Pynchon, "Gravity's Rainbow"