Ahem, the point of asking why a faster roll rate is useful is being lost; simply, it allows you to change direction quicker. An aircraft with a slow rate of roll cannot hope to shift it's heading as quick, which allows an opponent to either evade or come back around for another shooting pass. German pilots found that a good pilot in a Rata, who understood how to use roll rate, in 1941 was a more dangerous opponent than a pilot in a faster LaGG, who tended to use up a lot more sky to turn. Forget using modern dogfighting phrases when describing WW 2 dogfighting. A pilot of the time wouldn't have understood what you were saying but he would have understood turn rate, turn radius, roll rate, zoom climb, climb rate. In a nut shell, a fast roll rate allows the pilot to get in or out of a situation if he cant dive or climb away from trouble. Bear in mind that reversing a turn in a dogfight is almost guaranteed death, but a fast roll rate, as allude to by the P47 pilot, allows you to get away with it, as the rate at which you cross the enemy's heading is too fast for him to bear.

Jodel 112