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  1. mm4440

    Konig SC 430 3 cylinder Radial

    There are two sealing discs between the rods on the single crank pin and it fires every 120 degrees.
  2. mm4440

    Unlimited Air Racing Dead?

    The Sport Class rules make it the true Unlimited Class; all it takes is money. There has been an attempt to revive Formula V with limited success..
  3. mm4440

    B&S 49-series (810cm3/49ci) for aircraft use - TiPi's Q&A thread

    Industrial engines typically have a torque peak at 2500 rpm, too low for good power even for direct drive. More duration and lift for power is called for. A higher compression ratio to take advantage of premium or avgas with the cam shaft is worth doing. Because of how a prop absorbs torque...
  4. mm4440

    Lighweight opposite 2-stroke engines

    Hitler killed his dog.
  5. mm4440

    Lighweight opposite 2-stroke engines

    It amazes me that leaders from the last century have not learned its lessons; peace is much better than war.
  6. mm4440

    Lighweight opposite 2-stroke engines

    Hi Valery, Can you update the LC flat twin project? Hope you are far away from the crazy part of the world. Murry
  7. mm4440

    Flying wing as cheap and simple option for basic fun flying.

    Some Cubs fly better than others. 85 hp or more helps a lot. Some dusk Cub flights have been sublime for me.
  8. mm4440

    Flying wing as cheap and simple option for basic fun flying.

    You are obviously very experienced. Tell us, just how does a POS fly? .
  9. mm4440

    Discussion: Conceptual Design of an "Inexpensive" Single-Seat Motorglider

    Electric is the future for SLS At the moment it is still on the expensive side and heavy. If you can tolerate a short duration things are better. A 2 stroke paramotor engine is the most economical and lightest way to go today. Two hours under power is practical. It is a real challenge to get...
  10. mm4440

    Inverting a G13bb

    Well done. Do you have a total weight?
  11. mm4440

    Inverting a G13bb

    A tall redrive to get the prop shaft were you need it to be is the best solution, in my opinion.
  12. mm4440

    Inverting a G13bb

    The BOP V-8s oil pump was mounted on the front cover making it easy to re plumb the oil inlet.
  13. mm4440

    Inverting a G13bb

    Why? Are you thinking of direct drive of the prop?
  14. mm4440

    Ducted fan aircraft

    Hi Marc, was there ever a vol. 2 published? Written?
  15. mm4440

    The concept of a flying car will eventually succeed

    It is a tilting 3 wheeler and handles well with motorcycle tires.
  16. 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.
  17. 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.
  18. mm4440

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

    Lower altitudes reduced fighting the jet stream headwinds too.
  19. 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.