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  1. B

    Briggs & Stratton Vanguard 23hp build

    OK, starting a thread for my engine conversion. I just purchased a Vanguard 23hp engine. (386447 series) The goal is to minimize weight and maximize -reliable- horsepower. This will be a direct drive installation, so I do not forsee pushing the engine much past 4,000 rpm. Looking for...
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    Kolb Firefly

    Hello - looking for information on the Firefly. I came across a post mentioning “well-known“ low speed issues, but no elaboration. Can any Firefly owners comment on this? What airfoil is used on the Firefly? It reminds me of a Liebeck style airfoil - slightly concave on the back side. Does...
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    Industrial V-Twins

    Hello all. I'm looking for a small 4-stroke engine, roughly 30~35 hp for a DA-11/Cri Cri type design. Engines like the Kohler ECH-749 and Subaru Robin EH72. (750cc size to 1,000cc) How much weight can be trimmed from the "published" engine weight? (realistic flying weight) Any technical...
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    CAD Recommendations

    Hello all, I've been reading the forum for a while and finally joined up. I'm designing my own plane and at the stage where I'm ready to invest in some CAD software. At work, I've used Pro/E, Solidworks and ANSYS. My design is along the lines of a Hummel/Cri-Cri/DA-11... very small...
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    Another CAD question

    Hello all,
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