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  1. S

    Converting an existing biplane design to a neo classic monoplane

    In order to keep the cost of flying down, and developement time down as well, I'm considering (as my next project) buying a partially completed biplane project, and redesigning it as a monoplane. I like the looks of the golden age classics, so hints of the shape of Ryan STA, Wedell Williams...
  2. S

    Non Aviation Oil in your engine?

    Do any of you fliers use different oil? I know a number of Mazda Rotary Engine fliers use Mobile 1 or other synthetic oils. I suppose Corvair engines and Detroit V8s would use an automotive oil. Small Continental and Lycoming engines? the name brand aero oils offer 15-50 and 20-50 multi vis oil...
  3. S

    O-200, O-300 Spark plugs

    I was wondering if less expensive spark plugs can be used in O-200 & O-300 engines? Autolite 2223 and Champion XMD15 spark plugs look just like the shielded aviation plugs. 18mm diameter and 1/2" reach. They take the 5/8-24 shield nuts. They are used in the air cooled military GPU engines like...
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