Gliders > Slope Soaring

Where do I get an EPP flying wing?

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Ron:
Thanks all.

Lots to think about there.
One thing being, straight or delta?

Straight has advantages in performance, but delta is probably more robust.

The Flying Wings people have some interesting designs, like the Slipstream.
But they have quoted £45 (sterling) for shipping, which I think is just ridiculous.

Thanks for the offer Aidan.
I think, as I need something that will perform in light conditions too, I might go for the Mamba.
The Venom also looks good, but at 50" you can't chuck it in the car quite so easily......

Actually, having just put the back seats down again (where they usually are) and had a quick measure, maybe the Venom might be a good choice.

Decisions, decisions...

Ron

Aidan:
There's another option I forgot to mention yesterday. If you're interested in something for light lift and you can get your hands on some depron you might try a Pibros.

The Pibros is a small delta design which you can build start to finish in about 2hrs + radio installation with just a sheet of 3mm depron, some tape and some adhesive. They're good fun in light lift. They're pretty tough and haven't really enough mass to break in a crash but they do tend to wear out after a while! Still another 2 hrs work and you've got a brand new replacement!
I built one to test new sites earlier this year and it was ideal. The straight line performance isn't spectacular but they're extremely manoeuverable and you can have some fun with them providing the wind isn't too strong.

All the information you need to build one is at http://www.rc-soar.com/pibros/

Aidan

Fred:
Hi all,

Aahhh the delta pibros !! French design by Marcel Guwang. Built a dozen of those things... Really good machine for the price and time involved to make one !
Elsewhere in Europe, in France, you have Combat Air Model and EPP concept. You can find anything in EPP that will suit you, and cheap.

Ron:
Yes that Pibros looks fascinating.
And capable of more development too in terms of better airfoil etc. I expect.
I've never built in Depron.

Any idea where the nearest/easiest supplier is to Bantry?
Do they use that stuff for packaging I wonder?
And can you make it yourself by combining two chemicals, rather like the expanding foam stuff?
(Used to help a Formula Ford builder fill empty spaces in his cars with that).

Ron

Ron:
Ah. You can't make it yourself then...
A quote from a web site:

HOW TO PROCESS EPP

The manufacturing process is complex, requiring both technical expertise and specialised custom equipment. Polypropylene resin is combined with other ingredients in a multi-step proprietary process. Under tightly controlled conditions, extruded pellets expand to become consistently shaped beads of ARPRO® expanded polypropylene foam. Other specialised manufacturing techniques may be employed to produce variations in the final product form.

ARPRO® EPP foam beads are then injected into molds. In many cases, cost-effective multi-cavity aluminum molds are used. Pressure and steam heat fuse the beads into a finished shape. The finished ARPRO® EPP foam part becomes a key component in sub-assemblies incorporated in the original equipment manufacturer’s product.

Ron.

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