Hi Fokker38cc,

My plane is based on a design by [link=http://www.flybyphotography.com/CrazyHerb/index.htm]Crazy Herb[/link]. The original design no longer appears on his website but I have a copy [link=http://members.optusnet.com.au/~semac2/]HERE[/link].

The aircraft is constructed using DuPont Foamular 250 extruded polystyrene, which has a load rating of 25psi. It is heavier than white foam but far stronger.

The fuselage started as solid foam with a ply support down each side. The rest of the fuselage was sheeted with balsa, which added some weight.

The wing has two spars, 3mm ply would be just as strong and much lighter than the monster spars I used. The wing is covered in brown paper and paint.

If you build a plane like mine try to keep it light. While my plane flies nicely it is very heavy (15lb/7+Kg). The lighter you make it the better it will fly.

As already mentioned the engine is a Homelite 25cc, which has just been changed to 30cc. All the conversion parts were bought from a local manufacturer. The carburettor is a Walbro WA-167. Do not use the standard carb as it has no high end needle and will run very lean (even after lots of modification).

Forgot to mention I used a flat bottom wing, you can basically make whatever wing shape you want.

A friend also built one of these (see pics under "HERE") and we both found the plane to be tail heavy. I would suggest you add at least 2 inches to the front of the plane, leaving the wing where the plan shows.