“if the communist pilot did tengential turn, the avoid the tail and chase the front”

我想应该是 then avoid the tail吧。原文里就只有tengential turn 和 chase the front，哪里来的avoid the tail?

"he couldn't have shoot the front during the turn because the bullets would simply overshoot."

原文里又哪里说了王是在turn的时候开炮命中的？