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    First Flight Since Rebuild

    A 52" brings the hp down from 67 to 62. Again I don't know how accurate that really is but just trying to find an explanation.
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    First Flight Since Rebuild

    An 1835 VW is good for about 60 up but my prop calculator says you need about 67 hp to match your results. Don't know how accurate it is but you may be right about the power curve. 80 mph may have put him over the hump. Maybe a prop adjustment is in order.
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    First Flight Since Rebuild

    Thanks for the update. One other clue you gave us was you said the plane was plowing. Is the incidence of the wings correct? Grasping at straws...
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    First Flight Since Rebuild

    If the rpm is low then probably a mixture issue as the rpm should have increased in flight. Probably lean? EGTs?
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    First Flight Since Rebuild

    Couldn't load the video but I question the rpm gauge. That's the only thing that makes sense to me.
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    One odd bird!?

    If thats the case then it opens a lot of potential for all planes. This puts a lot of power in the hands of the builder. Very interesting!
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    One odd bird!?

    Thats a highly modified Sonerai based airframe. So, no, not the most efficient wing...
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    New engine for Sonex.

    Its called experimental for a reason. :) I asked because my son and I used that technique in his go kart when we mounted a v-twin MC shaft drive engine on it. The short splined shaft didn't look too solid with a sprocket for 50 hp. Hopefully yours is longer with more area to mount a pulley. I...
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    New engine for Sonex.

    Ok, I just figure most shaft drive engines are not designed for a side load. Good luck 👍
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    New engine for Sonex.

    Will you have a support bearing outside of the output pulley to take side loads from the belt?
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    Wooden spar Sonerai 2 - any memories?

    Can't answer your question but I have been considering a wood wing so I have interest in this thread.
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    Fabric top coat paint

    The heads are a heat sink due to a much larger mass then the exhaust gas so it will never get anywhere close to 1220°. No different than any other engine.
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    New engine for Sonex.

    The gearing at say 3.2 would produce a prop rpm of 2500 and that multiplies the torque to 275!
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    New engine for Sonex.

    Did you engineer all the TV issues with this?
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