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John Uptigrove has Passed

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  • John Uptigrove has Passed

    Composite FX reports on their Facebook page that John Uptigrove, designer of the Mosquito helicopter, has passed in an accident. My condolences to the family of such an innovative man, he will be missed.

    https://www.facebook.com/compositefx/
    Last edited by Alan_Cheatham; 07-16-2018, 10:44 AM.

  • #2
    Sad news; I liked and admired him.
    Regards, Vance Breese Gyroplane CFI http://www.breeseaircraft.com/

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    • #3
      Very Sad, He was an inspired designer. The ultralight Mosquito was a brilliant piece of work!
      "Nothing screams poor workmanship like wrinkles in the duct tape!"
      All opinions are my own, I've been wrong before and I'll be wrong again. Feel free to correct me if I am.
      PRA# 40294

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      • #4
        John was the son of two missionaries in India. He was a dedicated Christian and had no problems saying so. He died doing what he loved. I pray that unending peace be with his wife and two kids in this tough time.
        Attached Files
        Bryan Cobb, Helicopter Enthusiast
        Mfg.Engineer., Composites, Meggitt Aerospace, Rockmart, GA

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        • #5
          So sad. Was it from the accident?
          I wish to extend my deepest condolences to the Uptigrove family.
          Resistance is futile…… You will be compiled!
          Cheers,
          John Rountree

          PRA- Director, Secretary
          PRA- Business Manager

          PRA31 - Vice President of S.D. Rotorcraft Club
          http://www.Pra31.org

          U.S. Agent for Aviomania Aircraft... the most stable gyroplane on the market today.
          See: Aviomania USA http://www.AviomaniaUSA.com

          OEM Dealer for MGL Avionics - glass cockpit EFIS for Experimental aircraft Ask about DISCOUNTS for PRA MEMBERS

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          • #6
            Uptigrove died in a similar way to Helicycle designer B.J. Schramm by flying over a river but few details are out yet about John's accident. Some have suggested a possible wire strike but time will tell.


            https://www.cbc.ca/news/canada/calga...rash-1.4751080

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            • #7
              It is eerily similar ...the appearance of the crash site...to where BJ lost his life in the Helicycle.
              Bryan Cobb, Helicopter Enthusiast
              Mfg.Engineer., Composites, Meggitt Aerospace, Rockmart, GA

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              • #8
                I met John Uptigrove a number of years ago when I received a telephone call from him wanting to know why the rotor of a helicopter he was building flopped over to one side when he tried to run it up. He explained that he had copied the rotorhead of an early Rotorway.
                The Rotorway used a variant of the Bell-47 rotor system wherein the rotor hub is mounted on a universal joint and cyclic pitch is forced to occur about a pair of pivots of the U joint.
                I asked John if hed omitted the link that locks the feathering bearings together. Turned out that he had.
                John Uptigrove was one of the very few people in the hobycopter business who was a real rather than make believe engineer but everyone has a learning curve.
                the attachment is a diagrammatic drawing of the Bell-47 cyclic system.

                Click image for larger version

Name:	Bell-47.jpg
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ID:	1135948

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