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To: Jacques Chitte who wrote (51736)	6/3/2000 8:48:00 PM
From: Gauguin	Read Replies (2) \| Respond to of 71178

I have exactly the same questions and inferred conditions. ....the max rated pressure of the steel in the wheels and tracks is a property of the material that needs to be designed around. ..... Giving each drive wheel a very conservative (on the small side) solid contact of 4 square inches, that drops contact pressure..... How do we determine this contact area? The wheel is always trying to become round (I know this is a DUH.) In motion or at rest, what is the contact area? Also, it is my temporary contention that the wheels are not flat. That they are not cylindrical in bearing-suface-to-rail contact. They are cones. They rest on a very small bearing point at any given time.

To: Jacques Chitte who wrote (51736)	6/3/2000 9:08:00 PM
From: Ish	Read Replies (1) \| Respond to of 71178

<<Giving each drive wheel a very conservative (on the small side) solid contact of 4 square inches, that drops contact pressure below ten thousand psi. >> Aha thinking boy, does that 4" have equal pressure through out the 4". It's a ark. The ends would have less pressure than the middle.