Quote:
Originally Posted by maximara
True but IMHO that is because they utilized "off the shelf" TL6 materials rather then "true" TL7 designs and materials. The P-51 Mustang's engine for example was an Allison V-1710 which dated from 1930 (though it had seen improvements since then).
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But that was rapidly replaced by the Merlin, or a licensed-built version thereof. Also, the rest of the aircraft was very modern - modern materials, modern wing cross-section.