Sent: Sunday, April 15, 2018 at 1:20 PM
From: "Kayak via KRnet" <email@example.com>
To: KRnet <firstname.lastname@example.org>
Cc: Kayak <kayak1...@gmail.com>
Subject: KR> O-200 prop options
Just contemplating engine choices. An O-200 I believe requires quite a
large prop diameter. Are there three (or four) blade options that
would reduce this while maintaining the general efficiency of a long
A longer prop will pull better to shorten your take off roll, and may climb a
bit better, but a longer prop isn't going to cruise any faster. I've used both
60" and 62" diameter props on the O-200 on my KR. The difference was really
noticeable with my take off roll, but otherwise didn't make a lot of
difference. As many will tell you, a KR with an O-200 will take off shorter
than it can land, so the difference may not be terribly important to you.
When I talked to a prop maker about building me a 3 blade prop, he said he
could, but it would cost twice as much and that anything less than 150 HP was a
waste of money as two blades would take all the HP I could put out from an
O-200. He made it clear that in his opinion and experience as a prop maker,
using a 3 blade prop might score you points for the coolness factor, but
wouldn't really enhance the performance of a smaller engine.
Los Alamos, NM
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