MJ823 Supermarine Spitfire LFIX 21-2-44 AAEE 19-3-44 trials with 2x250lb GP and 2x120lb MkIIA smoke bombs under wings comparison trials with 4 and 5 blade props M66 install m/gs removed 25-6-44 further trials with 2x250lb GP and 1x500lb MC bomb 2x210lb smoke bombs and 90gal overload tank