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jjuutinen
Joined: 13 Jul 2003 Posts: 180
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Posted: Fri Jul 13, 2007 11:50 Post subject: Supercharger efficiency 100 srs Merlin vs G-series V-1710 |
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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
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Posted: Wed Aug 01, 2007 19:47 Post subject: |
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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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