[Spridgets] Rearden metal

Dean Hedin dlh2001 at comcast.net
Sun Dec 16 15:42:40 MST 2012

It depends on the vane material used.


You have to calculate the thermal expansion of the iron housing through the

range you expect.  20 to 200F is reasonable in this case.


You then calculate the vane growth in similar fashion.


You then subtract the two and that is the cold clearance.



From: WFO Herb [mailto:froggi60 at gmail.com] 
Sent: Sunday, December 16, 2012 1:09 AM
To: Dean Hedin
Cc: WeslakeMonza1330 at aol.com; spridgets at autox.team.net
Subject: Re: [Spridgets] Rearden metal



What clearance between rotor & vanes?


On Sat, Dec 15, 2012 at 10:03 PM, Dean Hedin <dlh2001 at comcast.net> wrote:

I'm making two rotors for the Sprite Judson supercharger.

Pictures to follow.

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