In a message dated 3/29/2005 10:14:16 AM Central Standard Time,
Dastaten@earthlink.net writes:

<< Considering I am going to be sending the oil  into a fitting that is
 connected to an aluminum bypass block on the pedestal, in OUR (rotary)  
 situations is this a critical issue? And what is/was the rationale for
 not using AL fittings on the Lyc's? Dissimilar metals? Heat expansion
 stresses? Fatigue?
  
 Dave >>

Fatigue.

Aluminum has a short fatigue life.

The engine is moving around on the mount all of the time. All hose runs to
the engine should have a curve and some slack in them to account for this
movement. The hose is clamped away from the engine with Adel or as part of another
hose end as in a bulkhead fitter or similar. Refer to your hose catalogue for
acceptable methods of installation.

Lynn E. Hanover