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Old 8th February 2008 | 10:24
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Ka8 Flyer
 
Joined: Jan 2004
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From: Germany
Mathematical relationship between N1 and N2
Assuming a "standard" LP/HP jet engine (say that of a B737 NG), what is the relationship between N1 and N2? As there is no direct linkage between the two shafts the ratio between N1/N2 won't be constant. Is there a way to calculate N1 from N2 (if the parameters such as air density, temperature etc... are known)?

Thanks!
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