 On 31 January 1942 , the Squadron moved to RAF Kings Cliffe . After an uneventful few months , RAF Fighter Command resumed its offensive policy in April 1942 when the weather cleared for large @-@ scale operations . Johnnie flew seven sweeps that month . But the situation had now changed . The Spitfire V , which was flown by the RAF had been a match for the Bf 109F , however , the Germans had introduced an new fighter : the Focke @-@ Wulf Fw 190 . It was faster at all altitudes below 25 @,@ 000 feet , possessed a faster roll rate , was more heavily armed and could out @-@ dive and out @-@ climb the Spitfire . Only in the turn could the Spitfire outperform the Fw 190 . The introduction of this new enemy fighter resulted in heavier casualty rates among the Spitfire squadrons until a new mark of Spitfire could be produced . Johnson claimed a damaged Fw 190 on 15 April 1942 but he witnessed the Fw 190s get the better of the British pilots consistently throughout most of 1942 : 
