Sent: Sunday, April 15, 2018 at 1:20 PM From: "Kayak via KRnet" <krnet@list.krnet.org> To: KRnet <krnet@list.krnet.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 two blade? ---------------------------
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. -Jeff Scott Los Alamos, NM _______________________________________________ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
