Fabricating multiple nozzles

[willisdaye]

I'm using my turbocharger jet engine for a science fair, and I need a way to make about 4 jetpipe nozzles of different output diameters. Would it be faster to make a bunch of cones by bending and welding a "C" shaped sheet, or making regular diagonal cuts along the edge of a straight pipe and bending the resulting 'flaps', sort of like these but not as pretty and not adjustable? How do you guys make yours?

[racket]

Hi

Use unplated sheet steel , ~ 1 mm - 0.040" thick , its easy to bend around a piece of bar/pipe to get to shape , then weld the seam , theres minimal pressure ( <12 psi) inside the jet nozzle , so it doesn't need to be very thick , I find this size is more than adequate .

If you make them all with the same "angle" , its possible to simply slip a smaller nozzled cone over the larger one and fix in place with a metal screw for short term testing to verify jet nozzle size requirement .

Cheers
John

[willisdaye]

Thanks. do you happen to have a calculator or conversion sheet for making cones?

[racket]

www.conelayout.com/

[willisdaye]

Thank you.