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Old 01-16-2021, 06:27 PM
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the Wasp
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Originally Posted by ahdofu
Do you see a change in the peak RPM of a glow engine in cold vs. warm days? In summer time this particular engine of mine was peaking at 9400 RPM (OAT ~ 75 degs). Yesterday it reached 8900 RPM at OAT of 50 degs. On one hand the higher density of air affects the power needs of the prop but then the higher air density should also help the motor as well. Anyway I was wondering what folks have experienced. BTW this is an OS Surpass 91P glow engine using a MA 14x6 prop with Omega 18/15 fuel.
yes !
the colder the air is the richer you need to tune

Jim
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