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Replacement engines for a Lazair III?
Currently equipped with twin Rotax 185's - 9hp (7kW) at 5000 RPM - approximately 60 lbs total. Factory option was twin JPX PUL 425's - 26hp (19kW) at 4600 RPM - 38 lbs each. Useful load with the twin Rotax setup is 240. I weigh 250. My thought is that if I increase thrust without substantially increasing weight, I can gain useful load, but I'm not an engineer. What are your thoughts? Am I thinking straight? And if so, what engine should I be looking at?
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