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PRANDTL-D Foam Board Wing by FoamyDM

What plane should I add the Prandtl-D Wing to?

  • Mini-Arrow

    Votes: 20 38.5%
  • FT-Explorer

    Votes: 15 28.8%
  • FoamyDM-HS Carrier

    Votes: 6 11.5%
  • FT-Simple Cub

    Votes: 6 11.5%
  • FT-Tiny Trainer

    Votes: 12 23.1%
  • FT-Bloody Baron (somehow)

    Votes: 7 13.5%
  • Airliner

    Votes: 14 26.9%

  • Total voters
    52

L Edge

Elite member
Yes. Albion Bowers wrote two white papers on the findings, and has since retired. The Prandlt-D and M projects appear closed, and they are working on other projects. doesn't mean we can't find uses for the findings in our hobby, right? :geek:
I am already working on one. They want to design a straight wing (no di, no sweep) and apply a variation version of Prandtl's approach.

Concept Simplified:
It would have a center control for elevator.
2 sets of trailing edge controls on each side of the straight wing. Small deflections.
The outer will be located so when it has small deflections, it would provide proverse yaw.
The inner would be located so when it has small deflections, it would provide adverse yaw.

Result:
When the aileron deflects in a turn, each yaw value(outer,inner) is different. So now we have to add each segment algebraically hoping to come up with the proper roll/yaw combination.

It is fun to explore when things don't exist.
 

Scotto

Elite member
I just found this.
I like how excited he is talking about it.
It looks like it needs air brakes to land. If you imagine a full size commercial one getting in ground effect plus hot air coming up from the tarmac it just wouldnt stop lol. You would probly want flaps too, so maybe a full flying canard would be better. Im picturing like a Beechcraft Starship without the winglets obviously.
 

FoamyDM

Building Fool-Flying Noob
I like how excited he is talking about it.
It looks like it needs air brakes to land. If you imagine a full size commercial one getting in ground effect plus hot air coming up from the tarmac it just wouldnt stop lol. You would probly want flaps too, so maybe a full flying canard would be better. Im picturing like a Beechcraft Starship without the winglets obviously.
Spoilers and split airbrake would likely do great to slow and "let the air out of the balloon"
 
>sigh< Sadly it has been a busy family year both in my family and Wifey's :-(. Hope to get back on track with builds. Indoor fly season has started, and that means so has build season. Eclipson PRANDTL builds are still top of printing/build list.

Cheers!
LitterBug
 

FoamyDM

Building Fool-Flying Noob
>sigh< Sadly it has been a busy family year both in my family and Wifey's :-(. Hope to get back on track with builds. Indoor fly season has started, and that means so has build season. Eclipson PRANDTL builds are still top of printing/build list.

Cheers!
LitterBug
Great. Life comes before hobbies. I would love some updates when you get to them.