I have been looking at ways to lay out the coolant plumbing from the water
pump, to the rads (evap cores) and back to the water pump.  In exploring the
possibility of using the Wiggins fittings (which I have) with solid 1-3/8"
Aluminum tubing, I am faced with concerns about engine movement with respect
to the Wiggins fittings, and also how to make some of the bends and
directional changes. I know Burns stainless has 90 degree elbows, but that
doesn't totally solve the problem. Is anybody flying with hard plumbed tubing
and wiggins?

I have also considered the stainless steel corrugated tubing that Chuck
dunlap used, but I wonder about fatigue life.

AN hose is probably the most reliable, but also stiff and expensive.

Bill Schertz
KIS Cruiser #4045

All the water cooled Continental AC engines use wiggins as do all 
high buck race cars. Plunge is taken care of as is angular movement
up to several degrees. They are also widely used on airliners.
Lining up the plumbing before welding is essential and done 
with telescopic inserts.

Paul Lamar
 
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