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Bf 109-Spitfire FTH/critical altitude comparison
Can oneone identify a source (or multiple sources) that would show the full throttle height/critical altitude for the different match-ups of Spitfire and Bf 109 that were seen throughout the Second World War, e.g., Bf 109E-3 vs. Spitfire IA, Bf 109F vs. Spitfire V, Bf 109G vs. Spitfire IX, Bf 109K vs. Spitfire XIV, with the appropriate combinations of engines/superchargers.
The issue is, trying to locate this data, there appears to be multiple approaches to defining full throttle height/critical altitude.
I knew a retired aeronautical engineer who worked out the basic Battle of Britian 109E-3/Spitfire IA FTH/critical altitude comparison back in 1979, but I would love to see how the comparison evolved.
thanks,
David Isby
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 author of THE DECISIVE DUEL: SPITFIRE VS 109, published by Little Brown. Visit its website at: http://Spitfirevs109.com
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