Recent content by C. Beaty

  1. C

    Ultralight Gyroplane Limitations

    Ben, it just so happens that I have a copy of the Bensen flight manual. I'd like to scan and post it on line but I’m using Linux and my scanner won’t work with that OS. I have W-7 on another HD that the scanner works on but my W-7 crashes all the time. I just have the powered flight manual. I...
  2. C

    Ultralight Gyroplane Limitations

    My partner and I, Bob Carbonell, learned to fly gyros via the Bensen flight training manual; fly on the end of a rope, then install the engine and start with crow hops. Bob, who later went to law school, was a stickler for following the book; he would look at his watch and say; “time for a...
  3. C

    Testing a fuel for presence of vodka.

    Why don’t modern automobiles suffer from vapor lock? It’s because modern automobile designers aren’t so dumb as to operate the fuel system with a suction head. There is always a fuel pump at the bottom of the fuel tank.
  4. C

    A new take on ultra-light gyroplane

    Dave, it had a conventional prerotator; ring gear, Bendix and drive shaft from the engine. An aluminum drive shaft is a good bit lighter than the usual Morse flex cable drive. Wolfy, that contraption was flown a couple of times, 30 years ago so my memory isn’t all that great; however, I still...
  5. C

    A new take on ultra-light gyroplane

    Here’s another example of the convenience of ultralite regs; An experiment that I had no intention of flying any higher than I was prepared to fall and was able to skip the hassle of registration. A Rotax 447 provided ample power. The hingeless 3 blade rotor had 6” blades of Boeing VR-7...
  6. C

    Hey Chuck, have a question about 3 blade gyro

    For a single place gyro with mast running in ~ the same direction as rotor thrust line, a 2” x 0.065 wall 4130 tube should be fine.
  7. C

    Hey Chuck, have a question about 3 blade gyro

    A rotor running at a 9 degree angle is operating at a lift/drag ratio of 6.3:1 (1/tan 9 degrees), typical for an airspeed of 50 mph.
  8. C

    Hey Chuck, have a question about 3 blade gyro

    David, the limber mast is a requirement for seesaw rotors. 3 blade drag hinged rotors need a rigid pylon otherwise they can get into an instability called “pylon whirl”; a 3 blade rotor with a blade or two lagged back where the CG is off center produces a stirring motion that can react violently...
  9. C

    A new take on ultra-light gyroplane

    Unfortunately, the “by the numbers” mentality of much of general aviation destroys creativity.
  10. C

    A new take on ultra-light gyroplane

    Nimble gyros with good power to weight ratios are a ball to fly, Dave and Pier Luigi is giving an excellent demonstration of that. The above video clip was his first fight in my gyro but he got the hang of it pretty quickly. The primary attributes of gyros, their immunity to stall/spin...
  11. C

    A new take on ultra-light gyroplane

    Why can't I post just one copy of a picture? The fellow playing with the dog is Pier Luigi’s interpreter; he grew up in Brooklyn, a member of an Italian family who moved back to Italy.
  12. C

    A new take on ultra-light gyroplane

    The advantages of an ultralite are many. My 240 lb gyro with Rotax 503 has more than adequate performance without the restrictions and paperwork hassle of an amateur built. It was strictly a toy for chasing feral hogs around Florida bayheads with no desire for cross country travel and flown...
  13. C

    Stirrable nose wheel or differential brakes.

    As far as I know, all trigear aircraft have nosewheel shimmy dampers: https://www.aopa.org/news-and-media/all-news/2016/september/flight-training-magazine/how-it-works And yes, a Dominator has one, albeit not a very good one but if properly adjusted will prevent shimmy.
  14. C

    Gyro History

    And they sold like hot cakes, didn’t they? Hobycopters are consumer products, no different than tennis sneakers; all depends upon perception and appearance. I’m content with Walmart’s $10 sneakers but the “in” crowd will settle for no less than $100 Air Jordans.
  15. C

    Power needed to spin rotors

    Don’t know; rotor blades where collective pitch and helicopter type cyclic pitch control is used need to be suitable for use on helicopters. Meaning zero pitching moment coefficient and balance about the aerodynamic center. If not a standard NACA airfoil, an analysis is necessary. Airfoil...
Top