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I am interested in that what Germans call the "Gleitzahl" (= engl. "gliding number"?). Let us assume the motor of an aircraft went dead (lack of fuel or whatever the reason is). The airplane is in 1000 meters altitude. Which distance can the plane sail from this altitude? I have a German source for WWI reporting the number was 13000 meters (Gleitzahl=13) for a not specified German type. Some modern gliders achieve a "Gleitzahl" of 40+ or even 60+.
Is anybody able to guess or report the similar numbers for different types of WWI-planes? Maybe the replica builders have some experience here?
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