Awesome plane, really.
Coming from jets I still have to manage the proper technique on takeoff. Right now I´m running out of rudder-authority on takeoff. The slight yaw to the right is easily countered, the initial yaw to the left as well. But then I can´t stop the bird from veering to the left until leaving the runway/skidding oround/crashing - even with full right rudder.
Zero Wind, moderate power, stick initially slightly aft. Rudder trim 6 degrees to the right before takeoff. Anything I can try?
It sounds like a power rate problem to me; bringing up the power too fast.
A takeoff in a Mustang (if done correctly) is a lesson in blending in the power at exactly the right rate to match the developing dynamic pressure on the control surfaces and the rate at which you are allowing the tail to come up.
It's truly a marriage of these factors. Arriving early with any one of them will cause the forces combining to yaw and roll you left to become dominant.
Done correctly, you begin by advancing the power SLOWLY to no more than 40 inches. Let the aircraft accelerate with the stick just back of neutral enough to lock the tail wheel. As you feel (see in the sim) the tail start to rise, be ready with the rudder response. At this point if done right instead of dancing the rudder you will be applying just the right amount of right rudder to counter the left turning forces. As speed increases you will be needing to blend in right aileron as well for torque since torque is a roll correction.
While all this is going on you should have slowly eased up the remaining power to either 55 inches if using 100 octane or 61 if you are rich enough to afford the 130
The entire thing is done in a single fluid motion. It takes practice to get it just right.
One thing that will help you remember about the takeoff in a 51. If you did it right, you just about had time to get to takeoff power before you reached rotation speed.
Good luck, and don't forget that aileron. You'll notice a slight roll to the left as you rotate if you did, and be careful. The A2A Mustang has been programmed for torque roll. Yank it off early at low speed and high
angle of attack and you could snap left and end your day!