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size does matter
I think you could make a contrail, but it would not be like what you see from jets, or from the WWII bomber formations. A jet or a big radial engine burn a lot more fuel, and put out a lot more water vapor than our little TSIO-360's. If we do make a contrail, it would be small, and it wouldn't last very long.
The only contrail I've ever made was at 2,000 feet in a Seneca, when a fuel line started leaking. Actually, I guess I was more like a crop duster!
Mark
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Mark Hislop
N37E
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