X-Mozilla-Keys:
Jeff Spitzer wrote:
At 05:15 AM 10/2/99 -0700, you wrote:
Here it is. I designed it for 0.065 wall Sched 5 aluminum pipe
Make your suggestions for improvements now before I upload
it to the ACRE web site.
1) I don't talk "schedule 5". I'm more used to X.X" O.D. x .XX wall. In
this case I think 1.5" O.D. would be fine (e.g. make th I.D. of your end
fitting 1.52 or so) and wall thickness can be anything the user wants.
1 1/4 IPS Sched 5 pipe is 1.660 OD 1.530 ID with a 0.065 wall.
Sched 5 is a more common tubing than specifing the OD and wall
but hey.. what the heck. What wall thickness of tubing would you like?
What ever it is.. make sure we can get "bends" in that wall.
1.5 inch OD aluminum tubing comes in 0.035, 0.049, 0.058 and
0.065. 0.035 is tough to weld in my experience but if you have
a good welder...???
2) I like the idea of double O-rings but I think it compromises the
flexibility. One of the most needed motions is angular. I don't think you
can get good angular movement with dual O-rings and have them seal properly.
3) The material looks too thin between the o-rings
OK I will fix that.
4) The clamp should have walls on the outside to hold the tie/hose clamp
from sliding off the end.
Good idea.
Jeff Spitzer
What O ring section diameter would you like? I suspect perhaps a larger
section may buy us more angularity.
I just got back from Joe Factor surplus in Burbank. He probably has the
worlds largest collection of surplus aircraft parts in the world.
One is going to play heck finding flexible AN-16 or AN-20 hose.
Most of the stuff is so stiff and heavy one might as well use ridgid
aluminum pipe. He also had a few collars for Wiggins couplings
but the sleaves and the ends were missing. Probably melted down
for the aluminum. The 1.5 inch stainless collars were way over
designed for our purposes.
Paul Lamar
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