Minimalist Glider

Discussion in 'The light stuff area' started by erkki67, Feb 15, 2019.

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  1. Feb 15, 2019 #1

    erkki67

    erkki67

    erkki67

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    image.jpeg

    The Platz Glider, from the thirties, wondering if this could be used for a bit more modern layout, pulled by the Fritz Ranger into the air?! :)
     
  2. Feb 15, 2019 #2

    jedi

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    Definately! Yes. There have been prior discussions on HBA and videos are posted of a similar configuration hang glider from many years ago (80s?). I was impressed.

    I do not know about the "Fritz Ranger". A google search only brought up the Vashon Ranger. I have seen it discussed here on HBA but do not know details.
     
  3. Feb 15, 2019 #3

    Aerowerx

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    Or is that a kite?

    I see at least 3 lines going off from the corners, attached to something on the ground.
     
  4. Feb 15, 2019 #4

    dew777

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    I might be wrong but to me a "Hang-Glider" IS a kite ~ instead of a "string" pulling it to the ground the operator's gravity is what pulls the thing back toward earth.
     
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  5. Feb 15, 2019 #5

    dew777

    dew777

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    Ok, that was REALLY over-simplified. . . I know that modern hang-gliders have an air-foil (the battons force this shape into the dacron) that generates lift by forward motion.
     
  6. Feb 15, 2019 #6

    blane.c

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    That kite looking thing looks like an opportunity for a bon fire, snaps, jagermeister. and "who wants to go up next"? "You want to go higher"?
     
  7. Feb 15, 2019 #7

    Hot Wings

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    Not a kite.

    [video=youtube;9LVtc8l3Z5o]https://www.youtube.com/watch?v=9LVtc8l3Z5o[/video]
     
    Last edited by a moderator: Mar 20, 2019
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  8. Feb 15, 2019 #8

    Tiger Tim

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    Someone on this forum built one, it was even in his avatar picture. I forget who it was, though.
     
  9. Feb 15, 2019 #9

    Aerowerx

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    Ah, yes!

    Much better view. Thanks, HW!

    Then what are they doing with those lines? Looks like a good opportunity for a "TWANG-KATHUMP".:shock:
     
  10. Feb 15, 2019 #10

    Victor Bravo

    Victor Bravo

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    That is the Platz sail-wing glider, designed by Reinhold Platz who had designed many of the more famous WW1 aircraft for Fokker. He was one of the leading aircraft designers of his day I believe. Definitely NOT a backyard Bozo.

    The intent of the design was that Platz could roll it up into a hang-glider-like tube and transport it to the flying site by bicycle. This was so he could fly something that did not violate the Versailles Treaty.

    I built a free flight indoor model of it, using a small electric motor, and it flew acceptably.

    We already have several choices for a modern "minimalist glider", the Sandlin GOAT, BUG, and Marske Monarch among others.
     
  11. Feb 15, 2019 #11

    ypsilon

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    I think you are referring to this gentleman.
     
  12. Feb 17, 2019 #12

    erkki67

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    But this bird uses the steering bar of a normal hanglider.

    The Platzglider was controlled by the two elevators directly.

    I’m wondering if the technology used on the sails of the windsurfers could be used for a new design of the Platz Glider?

    EB5D9760-CC85-4236-80A2-22D3260C91EE.jpeg
     
  13. Feb 17, 2019 #13

    Highflight

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    Hang gliders evolved away from loose sail to battens and airfoil shaped ribs for performance and safety. Back in the good old days of loose hang glider sails, pilots dreaded the "full luft dive", the first production models of the Weedhopper U/L also used an undefined sail, a shortcut that lead to several tragic accidents. Shaped battens or ribs to maintain the airfoil are in IMHO a absolute necessity.
     
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  14. Feb 18, 2019 #14

    erkki67

    erkki67

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    I'm not against shaped battens I think its even a great idea.

    So how would such a glider look a like with shaped battens and an airfoil similar to modern hang-glider, but with the simplicity of the Platz Glider?
     
  15. Feb 18, 2019 #15

    Highflight

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    First off it shouldn't have a gap between the main wings, I also don't think too much of the hand held jib/canard arrangement. It would be a good project to construct a 1/4 scale R/C model to determine if it is an efficient flyer compared to other modern hang glider designs, my guess would be... no.
     
  16. Feb 18, 2019 #16

    Highflight

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  17. Feb 19, 2019 #17

    erkki67

    erkki67

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    So, how could this glider being improved in therms of performance and security referring to the modern hang gliders?
     
  18. Mar 22, 2019 #18

    ARP

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    As Tiger Tim says I use the picture as my avatar. This was not a copy of the Platz although it has a similar plan form. The basic concept was to use a sailboat type rig with a jib and mainsail enabling high angle of attack without stalling.This gave very slow flight with an aerofoil that was self generating having no battens. It was capable of soaring flight and far better than the Rogallo hang gliders of the day 1974/75.

    Some video of it flying is on Youtube.
     

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  19. Mar 22, 2019 #19

    ARP

    ARP

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  20. Mar 22, 2019 #20

    dew777

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    @ARP,

    I like that idea :) Did that design ever wind up in "public-domain" ? I'd be interested in seeing drawings of it.
     

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