Ignore "Jet Turbine Development"; this wastes a great deal of resources for very little in performance over piston-engine models. Instead, rebuild your Attack Aircraft and Dive-Bombers with greater range and defense. This will greatly
improve their damage to enemy targets, but it will make them slower. Make adjustments to your Dive-Bomber/Attack Aircraft mix on aircraft carriers before attacking. The Dive-Bombers are far more effective against airfields than Attack Aircraft. Remember, it takes one week before the new planes will arrive and are useable in a strike.