Now for some technique.

Before slip-fitting the inner body tube--with it's Kevlar leader--into the upper tube, I first slit a "valley" into the forward end of the inner tube so the heavy Kevlar won't transfer a bulge to the outside surface of the upper tube.

Unless there's serious trauma to the model the anchor point of the Kevlar will never be accessible again, so the attachment has to be bombproof. I tie the Kevlar onto the inner tube with a bowline knot. I then lay the Kevlar into the valley I made in the inner tube and epoxy the upper body tube to the lower body tube.

Lastly, I use small rubber bands and a length of aluminum angle to brace the airframe perfectly straight until the epoxy hardens.

TBC

Attached Thumbnails

         

__________________
Never trust an atom. They make up everything.

4 out of 3 people struggle with math.

Chemically, alcohol IS a solution.

NAR# 94042
SAM# 0078