how are these 109s turns 180 with out penalties?

[recoilfx]

Black outs do occur with the 109s. But there is lesser chance because the 109s' elevators are heavy, especially under high speed. Spitfire pilots black out because they are turning too hard.

This is probably why Brit pilots think that the 109s lose no energy - they can't pull as hard and therefore do not bleed as much energy - adding the fact that the 109s are lighter therefore accelerates better.