[MineralMan]

"How many time has the radial engine been reborn? Every time so far it's proved to be a good air pump and that's about all."

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That's just silly. Ever hear of the B-17? It did pretty well with its four engines. Radial engines powered most aircraft for a long, long time. They worked very nicely, thanks.

Sometimes, broad statements like yours just beg for a response.

[org.whodat]

That's just silly

At one time the t-model was state of the art, but the last time I checked the year was 2006, not 1940's. and if you had ever studied power mechanics you would find that all combustion motor are first and foremost a air pump.