>Al,
>
>>If the jet flies 3x as fast, you basically break even ...
>
>I found one site last night that said above 500mph a turbojet engine is more efficient than a turboprop.
That doesn't surprise me at all. It's hard to get a turboprop to go that fast, period, because the prop tips are going supersonic, even with radically-swept blades.
Regards. Al
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