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  1. mm4440

    Struts on a Glider

    For a fun floater type sailplane, struts are worth considering. Minimum induced drag favors climb. Light weight also points to a strut based D-tube spar with cloth covering. Build light with enough span and self-launching is possible.
  2. mm4440

    Re-drives Belt or Chain ?

    Bou BorgWarner marine trans had bolt on reduction units that would go on the back of the FNR part of the trans. Bought many years ago, might be hard to find. I never mounted it but a simple flat plate adapter with a bearing and seal for the input shaft would do it.
  3. mm4440

    Veloce 600, 6 seat pressurized twin auto-converted engines.

    Lower altitudes reduced fighting the jet stream headwinds too.
  4. mm4440

    Veloce 600, 6 seat pressurized twin auto-converted engines.

    If you have an engine go out at 35k you have some time to descend and restart.
  5. mm4440

    Airplane For Sale Bellanca Super Viking Airframe

    O-235 for the Zenith? Better engine, more power for a little weight increase.
  6. mm4440

    Hexadyne information?"

    I was clearing out stuff from old Airventures and look what surfaced.
  7. mm4440

    How would you win the Sport Racing class/why am I wrong?

    There have been LS based V-16s built. Caddie had one in a show car: 1000hp.
  8. mm4440

    Hexadyne information?"

    Originally designed by Weslake in England. Three throw crank so cylinders are inline and very good balance.
  9. mm4440

    How would you win the Sport Racing class/why am I wrong?

    VB is correct that a centerline twin would be the best configuration for handling and min drag. Safety and pilot comfort sandwiched between a pair of high power racing engines may make wing mounted engines preferable, DO-335 and DH-103 are the models I would use. Boil off cooling...
  10. mm4440

    GM 1.6l Turbo Diesel (LH7)

    Porsche used one on their aircraft engine.
  11. mm4440

    The rise of FrankenEngine - An engine for the VP-21

    Polini Thor 303 - PoliniThor 38 hp, ~50#, ~$4500 two stroke, Single.
  12. mm4440

    Basic Configuration for a "Safe" airplane

    I like it but this topic is about safe aircraft configuration. Motorgliders can be very efficient but do not have any especially safe characteristics. Ercoupe or Facetmobile are the choices.
  13. mm4440

    Non- Biased Engine Reviews -Viking

    It worked fine with a small fuselage stretch; ~4".
  14. mm4440

    Non- Biased Engine Reviews -Viking

    How do you tell the difference between a DC-6 and a DC-7? 4 engine airplane with 3 blade props and a 3 engine airplane with 4 blade props.
  15. mm4440

    Non- Biased Engine Reviews -Viking

    If you want to avoid engine failures, fly sailplanes. You only have to worry on tow for a short time and if it fails someone else has to pay to fix it.
  16. mm4440

    Basic Configuration for a "Safe" airplane

    If you don't like an Ercoupe the right answer is a Facetmobile. if you
  17. mm4440

    The rise of FrankenEngine - An engine for the VP-21

    Bristol Cherub 1920's-30's. on piss gas.
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