Mike Wills wrote:

For Lynn Hanover,

At 03:08 PM 1/21/2001 -0800, you wrote:

I have had hose failures over the years, but they were all traced to the

idiot that built the car (me).  The point was that Earls and two types of
Aeroquip are not aircraft quality hoses, and are not intended to be. The
reusable aluminum fittings with the nice colors are very good for race

cars.

Easy to put together, light weight and available in any race store.

  The term "aircraft quality" gets used pretty regularly by many without
really defining what that means. As it applies to hoses/fittings what makes
a hose "aircraft quality"? A milspec number, or simply the fact that a
particular hose is marketed as "aircraft quality", or ??? What is it about
Earls hoses and fittings that makes it not suitable for aircraft use other
than the fact that they dont market it as "aircraft hose"? Or is it simply
the fact that the fittings are user installed and as such prone to
installation errors? From my Earls catalog Perform-O-Flex hose used with
their swivel seal fittings is good to 1000psi (-12 size) and temps from -40
to +300F.
  Which of the Aeroquip hoses types are "aircraft quality" and which are not?

 I use both the braided stainless with Teflon liner and

the new Aeroquip push on style. The fittings have barbed tubes, and the

hose

is two layers of Kevlar lined hose (blue) in many sizes. Looks good, very
light. Good for 200 pounds.

  Can you give a part number, style number, or trade name for the hose your
talking about here? Doing a little websurfing I see Aeroquip offers a
"Startlite" style hose using crimped fittings. Is this the hose your
talking about?

 For aircraft use the exposed stainless braid is

seldom used. When it is, it is on standoffs in adel clamps. If it gets

loose

the braid can saw through another hose or airframe aluminum or electrical
wire. Most aircraft fluids are carried in formed tubing. Otherwise in cloth
covered flex hose. The hose liner is selected specifically for the fluid
being carried.

  I guess most of us are concerned with oil and fuel plumbing. What type
hose/fittings/liners do you recommend for these applications?

  Thanks for your input on this subject Lynn.

Mike Wills

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