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Supercharger efficiency 100 srs Merlin vs G-series V-1710

 
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jjuutinen



Joined: 13 Jul 2003
Posts: 180
PostPosted: Fri Jul 13, 2007 11:50    Post subject: Supercharger efficiency 100 srs Merlin vs G-series V-1710 Reply with quote
Any info on this? I have Dan´s book and if it has this info, I´d appreciate page citation so I could find it!
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rinkol



Joined: 13 Jul 2003
Posts: 40
PostPosted: Wed Aug 01, 2007 19:47    Post subject: Reply with quote
Not sure if this helps, but there is a paper by Lovesy, "Development of the Rolls-Royce Merlin from 1939 to 1945," that gives the following for the performance of the two stage supercharger at 30,000 feet:

62% efficiency at a compression ratio of 7.2 (RMS14?)
65% efficiency at a compression ratio of 8.2 (experimental design?)

there is a graph showing overall efficiency vs pressure ratio (figure 11), but unfortunately, it is quite small and not terribly clear on the copy I have.

Robert
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