grobbins wrote:

Paul wrote:

grobbins wrote:

I'll
bet I can place a similar shaped piece of 1/8" steel, support it at the outer edge, and
"oil can" the center with hand pressure.

Paul wrote:

Give me a number. How far do you think you can bend it with hand pressure?
How much hand pressure?

The page below is from Roark. Care to make the calculations or should I do
it? :-)

grobbins wrote:

Calculations ? You do the calculations, I'll do the test.
I weigh 175lbs, so that will be the maximum hand pressure applied at a point near the center
hole. I will use a dial indicator to measure travel near the center hole as well. You
calculate what you think the travel will be, and I will tell you how much it actually is. 1/8"
plate with a 2-1/2" hole in the center, supported by a rotor housing.
Tomorrow (i guess later today). My wife will kill me if I fire up the shop at 12:45 in the
morning.

Doing this test and calculating it this way is a waste of time.
For the third time there is no load on the center of the plate!
Further more the steel plate is not being used by itself.

Paul Lamar

Do you agree that I can oil can the plate as described with only hand pressure ?
All the areas outside the swept area of the side seal, but within the bolt circle, are subjected to
various pressures.
I know the plate isn't being used by it's self, but no advantages from a shear connection can be
claimed between the baffles and steel plate. A lubricant (coolant) is between them. The plate and
housing as described will not be as strong as a rigid one piece casting of similar weight.

Grant

So what! We are not talking about just a 1/8 inch steel plate.
We don't even care if it is ASSTIFF. All we care about is if it is STIFF ENOUGH.
I like the facts that it is low technological risk, low cost and is easily 
overhauled.

Paul Lamar


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