Hey all, I tried to maiden my newly built Top Flite. P47 and had a crash.

I've been flying for more than 30 years but have just got into warbirds. My P47 rolled out very nice and straight, as it started to lift off
it gradually started turning left and didn't come back. I tried full aileron to the right and nothing. It struck the ground with the left wing and broke the cowl with small damage to rudder and wing. Fixable, but I'm very perplexed as to why it did what it did.

I double checked every thing before take off so I know the controls and radio were working fine.

Any suggestions?