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more on props

 
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Craymondw(at)aol.com
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PostPosted: Wed Jul 18, 2007 2:05 pm    Post subject: more on props Reply with quote

Formula one racer Don Sharp, tried several prop variations and kept the details of his winning prop a secret. Engine power is another factor. With each replacement to my engine, my plane went faster. I replaced the over hauled Bendix mags on my engine with new Slick mags and experienced better performance. I experimented with engine timing until I noticed increases in speed. I experimented with various spark plugs until settling on Autolight XL UREM38S fine wire plugs. I replaced my injectors with Airflow Performance nozzles and saw a large increase. I ground my exhaust flanges smooth and saw an increase. Maximum power can not be had unless the engine is properly leaned. I lean 50 degrees cool of peak. When I first flew my plane I noticed that my freshly over hauled servo wouldn't hold a setting. So I sent it to a respected overhaul shop and they found the servo had not been properly over hauled and that it wasn't properly adjusted. Even though I had good compression on all cylinders, I suspected one wasn't right when I pulled the prop through. I sent the cylinder in and the mechanic discovered one of the valves had been improperly ground and replaced it and reground the seat.


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