>
    >> Since Mazda spent hundreds  of man hours developing the air/coolant
    >> separator it behooves us to copy them. The stock Mazda RX8
   plastic can
    >> is running with a .9 bar or 13.5 psi pressure cap which is
    >> inadequate for aircraft use. We need something around 25 psi
    >> or above. Continental uses 50 psi which leads to a much heavier can.
    >> This design uses Zero Manufacturing deep drawn aluminum cans welded
    >> together. It is about 8 inches in diameter and about 5 inches
    >> high. Roughly the same size as the Mazda RX8 can.
    >>
    >> The tangential input is from the block. The bottom outlet
    >> goes to the rad. The output from the rad goes to the water pump.
    >>
    >> http://www.zerocases.com/metal-products/stock-deep-draw.jsp
   <http://www.zerocases.com/metal-products/stock-deep-draw.jsp>
    >> --  Paul Lamar ...No rotor no motor.
    >
    >
    > Paul,  maybe I am not on the right Zero Manufacturing page.  All the
    > deep drawn cans have a maximum wall thickness of .063 and are
   made of
    > 1100 or a few 3003.  Are these what  your are recommending?  A good
    > source of 6061 T6  large diameter tubing is from the suppliers to the
    > amateur  telescope guys.  Jerry
    >
    > I think .063 is thick enough for 30 psi but it must be tested.
    > Tubing with flat ends results in stress concentrations at the weld.
    >
    > Here is what it looks like installed.
    >
    > Paul Lamar ...No rotor no motor.


   Paul,
   I like your first sentence above!  At 50 psi, with a wall thickness of
   .063", the longitudinal stress is about 1590 psi.  This would be the
   stress near  the welded joint.   The circumferential stress is about
   6350 psi.   I don't have a aluminum data table handy, so, I don't know
   if this puts us in the ballpark with the drawn Zero cans or not.

   Aubrey

   It is well within the ultimate 11,000 psi tensile strength for that
   1100 alloy
   in the O condition. It works hardens like any other aluminum. At H14
   the number
   is 16,000 psi. Never the less I don't recommend using it at a
   pressure higher
   than 30 psi.


   Paul Lamar ...No rotor no motor.




How much will the material be weakened by the operating temperature?


Regards,

Matt-

I am at the hangar and the data is at home 65 miles away :)
From memory it is not a problem until it reaches about 500 F.

Paul Lamar ...No rotor no motor.

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