Pratt & Whitney R-1860-17 engines

Shortround6 said:

I have the book and it is of little help. the section on the R-1860 is about 4 pages including tables. It does say that 446 were built compared to 2,944 of the Hornet "A"s which stayed in production much longer.

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vikingBerserker said:

Does anybody have this book? I m trying to find out the HP for the R-1860-17 Twin Hornets. So far I have seen 525, 575, 600, 630, and 700 from various books and Air Corps documents.

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GrumpyOldCrewChief said:

The Devil is in the details. The dash number is of critical importance whenever you are asking about US based engines. Each sub-type was optimised for a specific use, or environment. I just hate seeing (for example) "The R-2800 generated 2000 hp". No, it didn't, at least not ALL R-2800's. Some managed as much as 2800 hp, on a daily basis. Most, yes, came close, but at different altitudes. And different RPM settings.
Sorry. Rant over...
... for now...

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