Stuart & Kathryn Fields wrote:

hey stewie go down to the local electrical place and buy yourself 4
vacuum cleaners, or find a 'vacuums are us' and buy 4 replacement
flexible wands. they are plastic, are flexible and are the diameter
you need.

good luck on the chopper.

btw I have seen an RV6 that used 4 pipes into one with no muffler at
all. it was the quietest aeroplane engine I've ever heard. I dont know
what the trick was in the geometry but it used the same engine as you
are using. some amazing stuff is possible there.

Stealth Pilot

Interesting idea If the flexible wands hold their shape to a reasonable
degree we may have a solution.

Stu



Stiffen the hose with a piece of 14-3 house wiring running through the center. Or encapsulate the shaped tube in about
3 layers of cheap duct tape.