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02-24-2009 | 06:29 AM

#10

Bone

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From: GraftonNSW, AUSTRALIA

RE: What To Expect From A 4-Stroke

Quote:

ORIGINAL: MinnFlyer

I've got lousey hearing, but even I can hear when the RPM start to drop.

What I HAVE seen is people throwing a prop because they are trying to hit 11,000 RPM with a 4-stroke, OR the 16,000 RPM their manual says their 2-stroke has it's highest horsepower at.

Allfat, the way you are doing it is correct, but too many people use a tach to hit a "Target" number - which is NOT a good thing to do.

Well, sort of.........

I use a tach with my 4 strokes to make sure I'm NOT exceeding a "target" number with any given size prop. However, once you become familiar with your engine/prop/fuel/plane setup then the continued regular use of the tach will not be necessary. Most 4 strokes are the "set & forget" type of contraptions [8D]

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