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Helicopters and autogyros

June 29th, 2009

An autogyro is characterised by a free-spinning rotor that turns due to passage of air upwards through the rotor. The vertical component of the total aerodynamic reaction of the rotor gives lift for the vehicle, and sustains the autogyro in the air.

Whereas a helicopter works by forcing the rotor blades through the air, pushing air downwards, the autogyro rotor blade generates lift in the same way as a glider’s wing by changing the angle of the air as it moves upwards and backwards relative to the rotor blade. The free-spinning blades turn by autorotation; the rotor blades are angled so that they not only give lift, but the angle of the blades causes the lift to accelerate the blades’ rotation rate, until the rotor turns at a stable speed with the drag and thrust forces in balance.

From wikipedia

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Betcha didn’t know helicopters were invented by a Spaniard, eh?

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  1. Holammer
    June 29th, 2009 at 15:36 | #1

    Hm. Educational AND informative. :P

  2. Drooling Fan Girl
    June 30th, 2009 at 19:38 | #2

  3. Cathoholic
    July 1st, 2009 at 13:10 | #3

    Wow, it informs and entertains. it’s INFOTAINMENT!

  4. psuedonymous
    July 3rd, 2009 at 17:42 | #4

    What, no Little Nellie? You bastard!

    • nestor
      July 3rd, 2009 at 18:50 | #5

      Well I can link to you only live twice, if you want

      That’s the one where Bond uses the Little Nellie autogyro

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