Me not military but a lurker (so apologies). My father's cousin flew Austers in the Second World War in North Africa and then Normandy as an artillery observer. They evaded fighters by flying low and turning tightly. He said the Luftwaffe fighters' tactic was not to try to shoot them down but to overfly the Auster at high speed and then pull up, hoping to force the Auster down into the ground with their slipstream.