Quote:
Originally Posted by Dadhawk
This whole conversation about whether you should/shouldn't cruise at somewhere close to mid-RPM range amuses the pilot side of me.
Subaru engines are used in experimental aircraft through conversions. They make great aircraft engines because of the boxer design (most general aviation aircraft use boxer type engines). In that configuration they run at 90 to 100% of the rev limit for hours on end in flight with no issues. I've personally flown with them in both an airplane and a gyrocopter.
It would never occur to me that cruising at 4K on the highway would be an issue for the engine.
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You have flown with "Subaru automotive engines" or "boxer aviation engines". Not all boxers are the same. Same with marine engines. For example a Honda V6 outboard isn't simply an Accord engine with a prop crammed on it.