Pratt & Whitney R-1860-17 engines

[vikingBerserker]

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.

 

[kmccutcheon]

The R-1860 was a single-row nine-cylinder engine and was called the Hornet B. The -11 had a 630 hp takeoff rating and a 600 hp normal rating. Please see page D9 of
http://www.enginehistory.org/Piston/P&W/R-1690/Hornet.pdf

 

[vikingBerserker]

Thank you!

 

[Shortround6]

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.

 

[Simon Thomas]

Ignore me - found the info

 

[vikingBerserker]

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.

Rats as I was thinking about buying it. I appreciate the heads up!

 

[Shortround6]

The book moves into the jet age about page 158 of a 509 page book (not counting index).
No piston engine is gone into in depth.

 

[Elvis]

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.

View attachment 592576

Wiki is always a good place to start.
Just Google the name of the engine (in this case, I Googled "P&W Hornet R-1860").
Looks like it made 575 HP @ 1950 rpm, but at what altitude, I don't know.

Pratt & Whitney R-1860 Hornet B - Wikipedia

 

[GrumpyOldCrewChief]

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...

 

[Elvis]

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...

I hear ya, Chief, but at least its a place to start.