rotax engine
Hi guys
I'm not a test pilot, but only an instructor. In fto where I fly there is p2006 that we used for MEP rating. The rotax engines have a limitation of 5800 rpm for 5 min maximum and 5500 RPM continuously. In the cockpit I have only Map gouge and propeller rpm gouge. How can know if I' m using the engine at or above 5500 RPM? thanks for any answer Michelda |
One way is to find out the gearbox ratio in the manual and divide it by 5500. Does the POH not have prop RPM numbers?
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I have prop RPM....
Red line at 2400 rpm and yellow band from 2400 to 2250 rpm. As you know with about 17/19 of map and full forward RPM lever, I have 2400 rpm but I don't think that the engine is turning at 5800 rpm. thanks for your answer michelda |
From this website:
Integrated reduction gearbox, ratio of 2.43:1 So it seems the markings on your rpm guage are correct for the engine limits. This is with no first-hand knowledge (I operated a Rotax 914 for a while, but never a 912, and I never really thought about the gearbox ratio that much!) - it's just based on what I've found with some help from Google. FFF ------------- |
Thanks for your replay,
We fly a lot single engine operation and I think it is important to understand if with less than maximum map and propeller control full forward, I' m flying at or above 5500 engine rpm.:ugh: Michelda |
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