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  1. jazzenjohn

    New rotorcraft concepts

    In my opinion it wouldn't fly at all unless the pilot was extraordinarily light. By the numbers it should work ok, but it doesn't put out nearly as much power as the Rotax 503 and the 503 is barely adequate. The Hirth engine as the Rotax wants a longer prop to get better thrust output. The B-8...
  2. jazzenjohn

    New rotorcraft concepts

    EZ, you should check out the Ikenga gyro. https://airandspace.si.edu/collection-objects/gyro-2000-ikenga-530z/nasm_A19940171000
  3. jazzenjohn

    New rotorcraft concepts

    The main reason there isn't many gyros with the extreme forward swept mast is that the mast when angled back ~9 degrees is basically under a pure tension load during flight. You get some bending from the motor thrust but not too bad. With my gyro I have ~320 pounds of thrust as a bend load, and...
  4. jazzenjohn

    New rotorcraft concepts

    That last video is Jim Eich. Looks like he's testing a new design/build. he hit something out on the El Mirage playa.
  5. jazzenjohn

    New rotorcraft concepts

    Look up JK-3 Juan for videos of the tractor gyro. I'm not sure I'd be looking at a Tesla battery pack as opposed to an RC LiPo pouch type cell system both for cost, power to weight, and current delivery. Generally, a pusher gyro outperformes a tractor gyro. The balance might shift a bit with...
  6. jazzenjohn

    New rotorcraft concepts

    I gotta give you credit EZbuildwing, That last tractor gyro picture G-BXXR i've never seen before. I'm sure you know that the Nano tractor is flying now.
  7. jazzenjohn

    Why battery-powered aircraft will never have significant range

    The first electrically powered, human carrying flying machine flew in 1884..... A Battery electric dirigible.
  8. jazzenjohn

    methyl methacrylate (MMA)

    I've used MMA for bonding wood to aluminum and aluminum to aluminum. Great stuff !! My biggest problem is that I haven't found one with a working time of more than 10-15 minutes. I've never seen anywhere near 45 minutes.
  9. jazzenjohn

    How Would You ‘Race’ Ultralights?

    honestly I don't think a paintball would damage a fabric covering. if it did, It was too degraded to fly anyway. No idea about staining.
  10. jazzenjohn

    How Would You ‘Race’ Ultralights?

    I would be concerned a paintball could blow up my Powerfin prop.
  11. jazzenjohn

    Hornet max engine size.....why ???

    I agree. Especially the part about attempting to get more speed from a gyro. 100 knots isn't too difficult, but much beyond that starts a cascade of changes.
  12. jazzenjohn

    Hornet max engine size.....why ???

    Can you point me to where these 90 degree pitch ups have been reported Jedi? I've never heard of it. Also, most, if not all explanations of bunt in my experience involve gyros that have the thrustline significantly above the vertical center of gravity in conjunction with a missing or...
  13. jazzenjohn

    How Would You ‘Race’ Ultralights?

    How about Ultralight laser tag? like this?
  14. jazzenjohn

    Hornet max engine size.....why ???

    Good luck with finishing Hornet 001 ! I know of a guy who used a Rotax 618 on a Gyrobee and it was the biggest engine used at that point. The 670 is currently being used on several gyros today , but it would be the first on a Hornet to the best of my knowledge. If you finish, it would have a...
  15. jazzenjohn

    New rotorcraft concepts

    Isn't that the tractor gyro built by Murrey Barker some time ago?
  16. jazzenjohn

    New rotorcraft concepts

    I've suggested to Nano to try the Swissauto 250 4 stroke on their gyro. It is a rather expensive engine. For the price of 2 of them on a bigger gyro you could get a Rotax 912 ULS and have money and more power to spare.
  17. jazzenjohn

    Has anyone built a Gyrobee lately?

    I'm always putting some wacky idea on my gyro. last year it was an autopilot which worked OK, and was fun to fly with a little electronic stick, but ultimately not very useful and used a huge amount of battery power. I might revisit it someday. This year I put a small 8.2 SF wing on my axle...
  18. jazzenjohn

    Verner 3VL now has an aluminum crankcase

    I see the weight at 92 pounds on the scale, but there is a 5 KG tare that appears on there too which is another 11 pounds... Not sure what to believe... is it 92 or 103? Beautiful little engine though !!
  19. jazzenjohn

    Actual Weights

    Ethan, I want to build a wing on my axle which is a piece of 2x2 aluminum tubing. I have great flexibility of shape, size, airfoil, etc. But ive never built a wing before, so simple and idiot proof as well as lightness are paramount. The plan is for a chord of about 15 inches and a flat bottom...
  20. jazzenjohn

    Actual Weights

    so what downscaled replica aircraft is the consensus opinion of a good candidate for part 103?
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