1936 Dart Pup (aka Dunstable Dart)

Discussion in 'Hangar Flying' started by cluttonfred, Mar 5, 2019.

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  1. Mar 5, 2019 #1

    cluttonfred

    cluttonfred

    cluttonfred

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    For some reason I find this pusher parasol layout very appealing, maybe for a modern, VW-powered microlight at 315 kg/694 lb gross weight?

    dart_pup.jpg 1133-1.jpg Dart_Pup_photo_Le_Pontentiel_AĆ©rien_Mondial_1936.jpg

    I think the "pilot" in the RC model needs a cushion to sit on.

     
    Last edited by a moderator: Mar 20, 2019
  2. Mar 5, 2019 #2

    Vigilant1

    Vigilant1

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    I'm not usually a fan of parasols, but I like that one.
    Great visibility. I'm not sure about the function of the wing sweep, but it looks good.
     
  3. Mar 5, 2019 #3

    cluttonfred

    cluttonfred

    cluttonfred

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    I suspect that the wing sweep was required by the combination of a relatively heavy engine and a relatively light pilot as well as clearing the prop. Note the trailing edge cut out. While I prefer four-strokes, this might be a good application for a modern tandem paramotor 35-40 hp two-stroke engine. The light engine and smallish prop should allow you to reduce the sweep a little and get rid of the cut out for the prop.

    Here are a couple of contemporary articles about the original Dunstable Dart from FLIGHT magazine.
     

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    Last edited: Mar 5, 2019
  4. Mar 5, 2019 #4

    Riggerrob

    Riggerrob

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    As two articles state, swept back wings help roll and yaw stability.

    They also state that sweep back helps balance the airplane. Many other single-engined, pusher airplanes struggle with balance (e.g. Republic Seabee light amphibian). One version of the Spencer Aircar (plans-built successor to Seabee) has slightly swept wings for balance.
     
  5. Mar 5, 2019 #5

    cluttonfred

    cluttonfred

    cluttonfred

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    Yup, the sweep can be a real benefit. This actually reminds me a bit of David Thurston's clearly amphibian-influenced landplane designs in his books Design for Flying and Design for Safety. Blend the Dart Pup with the Thurston-designed Patchen Explorer (below) and you actually have a very modern looking little plane.

    04.jpg
     

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