Welcome to Slopefun! We know Slope flying is alot of fun - hence the name Slope Fun!

On this site you will find information about radio controlled slope and electric planes, especially the EPP (Expanded Polypopylene) combat flying wings, their construction, flying and of course you can even buy one!

Fatboy Embedded Spar

Most EPP foam gliders have a groove into which a round spar is glued. The trouble is, this will give you a grove at the surface.
Grooves across wings are bad news, they create a lot of drag. They cause premature separation and stall. Surface grooves can severely destabilise an aircraft. That makes flying much more difficult.

Some manufacturers just place spars under the wing, but this makes the model weak and flimsy. Other designs lay balsa over the spar but the balsa is flat not curved, like the wings surface.

The spar should sit inside the wing, near the top surface, for maximum strength. Fat Boys embedded spar system does exactly this, its strong and doesn't interfere with the airfoil.

Fat Boy ARC wings come with the spars already glued into place. The wing is straight and can't move or bend. You just need to glue them together and add the jointer and the wing is ready to cover.

You will be amazed how easy it is the cover and fit your radio gear, with our unique assembly schemes.

EPP combat flying wings are virtually indestructable, which means you can actually learn how to fly them without worrying too much about crashing, as a crash will only hurt your pride (or your head if you fly into yourself). This is a big advantage over the traditional balsa and/or fibreglass carbon gliders, which become unflyable in the hands of a beginner after a failed fight against gravity!.

So have a look around the site - hopefully you will find some helpful information, some nice photos, and maybe even a glider to buy! Most of all, have fun - that's what it is all about!