39MU 3-4-43 RAE 4-43 comparison drag reduction trials with EF731 EF644 EN946 26-5-43 escort for Ju88 and Fw190 which were fitt with a radar device reacting to Monica tail warning radar install in British bombers The Wireless and Electrical Flt used JL227 for instns trials as they were under extreme pressure from the Air Min to find an answer to the problem and numerous aircraft were pressed into service including EN498 fitt AI radar X4258 EF644 X4258 was also fitt with 'Relay' air-to-air homing equip Wellingtons HZ202 and HZ579 were fitt with Eureka/Babs Mosquito DZ725 and DD619 Lancaster ED630 Fortress fitt with Oboe Beaufighter T4790 Defiant AA539 and many other aircraft types 411AAF 19-11-43 302S 1-1-44 RAE 4-44 for trials at high alt of exhaust gas windscreen misting 80S 29-5-44 VA 23-10-44 mods 310S 'NN-F' 23-10-44 312S 27-5-45 RHAF 20-4-48