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Re: Douglas TBD range needed
From a recent discussion on J-aircraft.org, it was shown that the USN combat radius (example SBD) was one quarter that of the range. Normally one third would be considered a reasonably assumption, but carrier aircraft have a need for greater allowances. This suggests a combat range of around 110 miles, or about one hour travelling. Given the quoted cruise speed, this would be consistent with an the quoted 80min interval between launch of the first examples and beginning an attack.
Range is always considered one way, with no combat or (usually) other allowances. It is a measure of the extreme capability of the aircraft. There is an accepted formula known as the Breguet Range Equation.
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