Paul Mennen wrote:
Paul, You're dealing with such tremendous pressures here, all you need
to do is put a little soap on the barbed fitting & push the line on---
it will conform to the barbs enough that it won't blow off until you
reach 0.5Mach.--leave the clamps off.


Actually I already tried that solution, but the clamps are not the
problem. If I push the tube all the way on the fitting it is
amazingly hard to pull the tube off. I can usually do it outside
the airplane, but not lying on my back reaching up under the
instrument panel. I end up just cutting the tubes off, but there
is a limited number of times I can do that before the tubes will
get too short. Perhaps if I don't push the tube on all the way ...
But it would be a fine line. Or perhaps Tygon isn't the right
stuff, and another tubing type would make it easier? Still I
think a fancier fitting might be appropriate.

~Paul



There are a couple of choices.


Parker has some great fittings which allow the connection to be broken
and reinserted with only one hand. They are not very expensive either!
These fittings are used in hydraulic and air applications. (truck brakes)
I've used these for connections in my pitot/static test box. 100% air tight!

Another is to get a set of hose pliers. They are designed to disconnect
hoses from barbed fittings.

Dave

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