Search results

  1. bryancobb

    Power needed to spin rotors

    You are right. Most times, the TIPS are where pitch is measured for rigging the head. A normal amount of twist for a helicopter blade is about 8 degrees over the span. Minus 1 at the tip would of course be +7 At the blade grips.
  2. bryancobb

    Power needed to spin rotors

    My guess is Oskar was surprised that full down collective and making little or no lift consumes so much horsepower because induced drag is zero or near zero. XXavier, helicopters have to have enough negative pitch "rigged-in" to be able to keep rotor RPM constant and in the green during...
  3. bryancobb

    SOLD - DSS Personal Microbalancer

    I got the balancer today and it looks great. I am anxious to knock out a balance job on three customer propellers at the airport to pay for it. Thanks a bunch Tom.
  4. bryancobb

    SOLD - DSS Personal Microbalancer

    I want it.
  5. bryancobb

    SOLD - DSS Personal Microbalancer

    Been looking for one for 3 years. I'll take it. Did you buy it new? Around what date was it purchased new? And the dumb question...has the battery been removed and not corroded inside?
  6. bryancobb

    Mini 500 Airworthiness Directives

    I will second what WaspAir stated and I am probably the most enthusiastic person anywhere about Mini-500's. The little helicopter is sexy and looks like a $million from 50 feet. It is NOT however, a machine for someone who is not very talented and experienced with things mechanical. You MUST...
  7. bryancobb

    Mini 500 Airworthiness Directives

    Here's the rest except the very large one. I'll keep trying.
  8. bryancobb

    Mini 500 Airworthiness Directives

    I think I can upload PFD's???
  9. bryancobb

    Early 1990s AS18 and Farrington brochures

    Did you have to do anything special to upload PDF's?
  10. bryancobb

    Mini 500 Airworthiness Directives

    All 17 Revolution Helicopter AD's for Mini-500 zipped-up and ready to send to you. 5473kb. Where to send??
  11. bryancobb

    perrysplus Wanted to See a H/V Diagram

    Pretty sure they are developed by flight testing by real test-pilots when the manufacturer goes through getting a new design certificated. The US FAA has a Phase I flight test booklet that gives a little guidance on how to develop a flight test program for all homebuilt aircraft. The link...
  12. bryancobb

    perrysplus Wanted to See a H/V Diagram

  13. bryancobb

    Unloading the rotor

    If you want to fly fast...choose a fixed wing. If you want to fly fun and slow...choose a fling wing. They are like oil and water, starting at the Radio Control Flying Field. They get on each others' nerves and get in each others' way. That will never change.
  14. bryancobb

    Don't need any extra TP

    The Cobb's have ended our relationship with TP 4Evahhhhh!
  15. bryancobb

    I agree the gyroplane accident rate is too high;

    Helicopters are NOT safe. Gyros are NOT safe. Airplanes are NOT safe. Flying is NOT safe. Flying can be done with a manageable amount of risk, but only by people who try to be careful and use their brains.
  16. bryancobb

    I agree the gyroplane accident rate is too high;

    Fara! E X A C T L Y ...." its likely many are simply put in the hanger." If gyro pilots would a) never fly below 500' AGL unless in a pass straight along the runway or field, b) and QUIT showing off or "demonstrating the edges" of the flight envelope, then the record would improve...
  17. bryancobb

    I agree the gyroplane accident rate is too high;

    Vance, The safety record for gyros, in my opinion is because type flying most gyro guys I have seen do is sort of in the same family as fixed-wing airshow flying when those pilots have a low altitude waiver. What I mean by this is, it's low. It has a lot of yanking and banking, and it it's...
  18. bryancobb

    Vortex Ring State in gyros?

    Wasp's statement "I would bet that most of spanwise lift distributions diagrams you have seen for helicopters are for powered flight and not for autorotation with flow from below the disc" probably identifies the disconnect in my thinking. Seeing a diagram like this at 30, 40, 50, 60...100%...
  19. bryancobb

    Vortex Ring State in gyros?

    I understand the variances in relative wind along the span of a spinning, twisted blade. What I do not understand about the idea of gyro blades having POSITIVE twist from root toward tip is... * How do you folks reconcile the obvious condition that the outer most portions of the flimsy blades...
  20. bryancobb

    Vortex Ring State in gyros?

    thomasant, Thanks for your 1st hand account. Just keep one thing in mind. The aircraft must be descending into the column of air at a velocity that exceeds the speed of the column of air. If your event created some descending column of air like you suspect, then you must have flown into that...
Top