OS Fr7-420 questions
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Join Date: Feb 2007
Location: Columbia,
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OS Fr7-420 questions
I'm looking at getting an OS Fr7-420 engine and have a a couple of questions:
1. The manual (page 18) says to connect a piece of tubing to the breather nipple, and the accmpanying diagram shows the drain plug installed in this tube. Should the breather/drain be open or closed for operation?
2. To match the engine to an airframe; what rpm should i expect with a 22x10 prop?
Thank you,
Tom
1. The manual (page 18) says to connect a piece of tubing to the breather nipple, and the accmpanying diagram shows the drain plug installed in this tube. Should the breather/drain be open or closed for operation?
2. To match the engine to an airframe; what rpm should i expect with a 22x10 prop?
Thank you,
Tom
Last edited by tdevince; 09-07-2017 at 04:16 PM.