Re: [T3] MPS observations

["Jim Adney" <jadney@vwtype3.org>]

On 9 Aug 2008 at 10:14, Bobsnotch@aol.com wrote:

> Well we know both copper and stainless steel work harden. but I don't know 
> how many years it would take to do that. I could dig out a micrometer, and 
> measure the thickness of the SS one, and give you an idea of how thin it is. It 
> looks like it's about 28 guage stainless steel though.

Yes, I'd like to know how thick the SST one is.

Also, the notes that I've seen, mention that on the OE brass ones the 
outer convolution is larger than the inner 2, but that the SST repros 
did not have this feature. Does yours have 3 equal convolutions?

I measure the OE brass ones at about .0035" or about 0.1 mm. I have 
some shim brass stock that's .003" that I was hoping to use, but the 
work hardening problem is the big concern here. I would think that in 
a properly designed diaphram the part would only flex elastically and 
never deform inelastically, so it should not work harden (since it is 
never actually "worked.") I'm not sure how true that actually is in 
practice.

-- 
*******************************
Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA
*******************************

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Unsubscribe?  See http://www.vwtype3.org/list/
Need list help? mailto:gregm@vwtype3.org
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~