[5-in-50]

Spitfire and Hurricane:

• Fully open radiator vent for takeoff and climb out
• Do not exceed a 'Boost' value of "4" for any more than 30-60 seconds, but DO use full power for takeoff
• radiator vent can be half-closed in the cruise
• Changing prop pitch directly affects the 'Boost' pressure, if you change to course pitch, reset your boost to somewhere below "4" to prevent engine damage
• In a dive, throttle back to prevent an propeller overspeed condition and only throttle back up when you've slowed down again
• Prop pitch can overspeed the engine causing damage, but often the problem lies in the increasing manifold pressure (boost) as the pilot decreases prop pitch