 The first use of these tactics by the Tangmere Wing was used on 6 May 1941 . The Wing engaged Bf 109Fs from Jagdgeschwader 51 ( Fighter Wing 51 ) , led by Werner Mölders . Noticing the approaching Germans below and behind them , the Spitfires feigned ignorance . Waiting for the optimum moment to turn the tables , Bader called for them to break , and whip around behind the Bf 109s . Unfortunately , while the tactic had been successful in avoiding a surprise attack , the break was mistimed . It left some Bf 109s still behind the Spitfires . In the battle that followed the Wing shot down one Bf 109 and damaged another , although Dundas was shot down for the second time in his career — and once again by Mölders , who had remained behind the British . Dundas was able to nurse his crippled fighter back to base and crash @-@ land . 
