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This is totally unbelievable.
Take-off speed is, say 100 mph. 115 feet is 38 yards. That is a plausible acceleration ( average about 3g) for a Top Fuel dragster, but not for a WW2 wintage stock propeller airplane.
Or then there must have been a storm like headwind.
This is a good reality check for performance:A Spitfire LF.IX managed time to climb of 2min 10s (130s) using +25psi boost, PN150 fuel and a weight of 7400lb. This appears to be at or near max loaded weight.
Spitfire IX Trials at +25 boost
I doubt those charts are "legends."s
Meaning they are accurate and authentic"10-9?"
This is a good reality check for performance:
Spitfire IX, +25lb/in^2 boost, 7400lb weight: Power between 0-10,000 ft: average 1900 hp. Time to 10,000 ft: 130s.
3,9 lb/hp = 4,610 fpm
Stock F8F-1: weight 9,600 lbs, power needed to same weight/power - ratio: 2460 hp
Stock F8F-2: weight: 10,400 lb, power needed to same weight/power -ratio: 2670 hp.
And according to the legend the climb rate was 6,400 fpm.
Lyle Sheltons Bearcat had 4000+ hp with much less weight for the alleged performance.
The numbers just don't add up.
Meaning they are accurate and authentic
The Spitfire was at or near its maximum weight.
Empty weight for a IX is 5000-odd pounds.
For the F8F-2 at 8000lbs the power (for the same p/w ratio as the Spit) is 2051hp.
Ray Wagner's book "American Combat Planes" show the engine for an F8F-2 as being an R-2800-34W with 2300 take-off hp.
Ray Wagner's book "American Combat Planes" show the engine for an F8F-2 as being an R-2800-34W with 2300 take-off hp.