Jean Claude's latest activity

  • Jean Claude
    The 4-seater proposal displays a total lack of technical competence. Sort of like the aviation doodles we used to do as high school boys.
  • Jean Claude
    Jean Claude replied to the thread First jump takeoff in France.
    Let me evaluate very roughly the possibility of takeoff with no run by pitch setting jump: Assuming the rotor pitch is adjusted abruptly...
  • Jean Claude
    Jean Claude replied to the thread First jump takeoff in France.
    If I understand correctly, the collective pitch increases when turning, since the controller automatically increases the pitch to...
  • Jean Claude
    Jean Claude replied to the thread First jump takeoff in France.
    As I said, I'm talking about constraints of rotation torque on the blade roots. I'm not even sure that gyrocopter blades are tested in...
  • Jean Claude
    Jean Claude replied to the thread First jump takeoff in France.
    It is not only the centrifugal stress that must be taken into account for the jump takeoff, it is mainly the over-torque applied by the...
  • Jean Claude
    Jean Claude replied to the thread Wheel brakes.
    Yes, when they are hydraulic, Woolfy. Disc mechanical brakes have a single moving pad pushed by a ball cam. This pad pushes the disc...
  • Jean Claude
    Jean Claude replied to the thread Wheel brakes.
    After thinking about it, I don't believe that the direction of the effort in the spokes is chosen for reasons of thermal expansion of...
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  • Jean Claude
    Jean Claude reacted to wolfy's post in the thread Wheel brakes with Like Like.
    Jc I totally agree with you the manufacturer want the spokes in compression. I would never put those tiny 2 mm thick spokes in...
  • Jean Claude
    Jean Claude replied to the thread Wheel brakes.
    Thank you, Mike A link ?
  • Jean Claude
    Jean Claude replied to the thread Reflex Airfoils.
    "In the above The Cm of -.020 was converted to a positive number to increase the distance from leading edge to past AC...to make .27...
  • Jean Claude
    Jean Claude replied to the thread Wheel brakes.
    No, this is the direction requested by the manufacturer
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  • Jean Claude
    Jean Claude replied to the thread Reflex Airfoils.
    NACA TN 1998, fig 1 https://ntrs.nasa.gov/api/citations/19930082712/downloads/19930082712.pdf at RN = 1,800,000...
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  • Jean Claude
    Jean Claude replied to the thread Reflex Airfoils.
    According NACA TN 1998, we see that Cm = 0 when Cl = 0, and Cm = -0.020 when Cl = 1 This variation is due to the usual measurement...
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  • Jean Claude
    Jean Claude posted the thread Wheel brakes in Builders Corner.
    All bicycle brake discs are mounted in the direction shown on this picture. That is to say with "spokes" working in compression rather...
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  • Jean Claude
    Jean Claude replied to the thread Reflex Airfoils.
    1. Zero moment or moment more positive than negative at all angles of attack and airflow? Yes: Zero or slightly positive moment 2. Make...
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