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Merlin power data at reduced CR/+23 boost (100/130 fuel)

 
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jjuutinen



Joined: 13 Jul 2003
Posts: 180

PostPosted: Fri Jul 13, 2007 11:53    Post subject: Merlin power data at reduced CR/+23 boost (100/130 fuel) Reply with quote

In RRHT book RR and the Mustang it is mentioned a that a Merlin was modified to run at +23 boost with reduced compression ratio on 100/130 fuel. It then listst the performance improvements it gave for the aircraft (vs. standard Merlin at +18 boost) but not the power developed:( So, how much power at those settings?
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dbirch



Joined: 30 Apr 2007
Posts: 14

PostPosted: Fri Dec 07, 2007 07:43    Post subject: Reply with quote

JJ

Just before the Mustang was fitted with the 5.5 C/R Merlin, an RM10SM was thus modified at Derby and ran on the testbed. Its performance was as follows:

Combat: 3000 rpm +23 lb boost
MS gear - 1835 BHP at 1500 ft.
FS gear - 1690 BHP at 12,500 ft.

Above are static heights.

Hope this answers you question.


Dave Birch, Rolls-Royce Heritage Trust.
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jjuutinen



Joined: 13 Jul 2003
Posts: 180

PostPosted: Fri Dec 07, 2007 21:53    Post subject: Reply with quote

Thanks! Thus it is that the modified Merlin put out 100+ hp over the standard Mk. 66 with the same fuel. Not bad.
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