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PRANDTL-D Foam Board Wing by FoamyDM

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

  • Mini-Arrow

    Votes: 11 42.3%
  • FT-Explorer

    Votes: 8 30.8%
  • FoamyDM-HS Carrier

    Votes: 4 15.4%
  • FT-Simple Cub

    Votes: 3 11.5%
  • FT-Tiny Trainer

    Votes: 6 23.1%
  • FT-Bloody Baron (somehow)

    Votes: 4 15.4%
  • Airliner

    Votes: 6 23.1%

  • Total voters
    26

FoamyDM

Building Fool-Flying Noob
#65
I have a video - to be posted soon.
I have proof of flight, but one that ended in a destroyed the plane. The wire was pulled from the motor...
It went forward into the wind. Result were an immediate immelman, without recovery (as I ducked, and threw my arm in the way.) busted the prop blades. I'll just have to try again after the holiday.
 

FoamyDM

Building Fool-Flying Noob
#71
It turned around faster than I ever expected... I'll try it again soon, but for now. I might have to find more f pack motors or cannibalize a quad.
 

PsyBorg

Wake up! Time to fly!
#72
Rule number one is dont lead with your face. So.....
Rule number two is...........

Dont try and catch with your face.

Man you are one lucky brother to not have stitches from that one. wow. Glad yer OK mate.

take these lessons from a person who has done this and knows.......

 

FoamyDM

Building Fool-Flying Noob
#73
I was glad for two things;
1. it's a pusher. (I felt like I was punching an approaching shark to deflect the bite.)
2. The coat is very thick.

This plane is Simple to build. next time I need to load it up and glide it.
 
#74
Just finished cutting mine out, going to start glueing in a minute. I've gotta get a whole new power system for this one since my smallest battery will never fit. IMG_20200110_150750.jpg
It's a lot more slender than I expected, it looks really sharp! Honestly it cracks me up that NASA might have spent a few million dollars on this project only to have a few glorified origamists build it in their backyard.
 
Last edited:
#75
I'm thinking I should probably start my own build thread Soon, but for now here's a quick update.
I've got one wing finished and the other almost done. IMG_20200110_165928.jpg
I'm loving the shape the wing makes, it's just unlike anything else I've seen. I ran out of dtfb building an Arrowhead, so I'm using Ross fb. It has pros and cons but so far I'm liking it, I may use both dtfb and rfb on future builds. The Ross board is more like packing foam than styrofoam, I think it's a bit lighter too. This also means that it's somewhat moldable without removing the paper, which makes shallow curves significantly stronger than dtfb with the paper peeled off. However it is impossible to peel the paper off rfb, which is its drawback.
As a result of this my wing feels very rigid, I don't think I'll have the flexing issues FoamyDM pointed out. However, building this with dtfb would have been much easier, gluing the outboard section with rfb was somewhat hair-raising.
 

FoamyDM

Building Fool-Flying Noob
#77
Just finished cutting mine out, going to start glueing in a minute. I've gotta get a whole new power system for this one since my smallest battery will never fit. View attachment 154029
It's a lot more slender than I expected, it looks really sharp! Honestly it cracks me up that NASA might have spent a few million dollars on this project only to have a few glorified origamists build it in their backyard.
Right... Remember this concept was nearly abandoned once the other methods of building were proven. (Also simpler to calculate) Once the best ways of succeeding were determined (by NASA et. Al.) It becomes simple-ish to recreate and build. Now we get to focus on alternate methods. :)