"GeorgeB" wrote in message
...
On Wed, 4 Apr 2007 18:26:52 -0400, "Capt. Geoffrey Thorpe" The Sea
Hawk at wow way d0t com wrote:

The volatility should be the average of the two.

I don't know that I would assume that - vapor pressure can have some
non-linear behavior. Example: When you add ethanol, the vapor pressure
with
10% is higher than the vapor pressure at either 0% or 85%...

I am not disagreeing, but do wonder where this information is
available?

Thanks, George


I've seen it at work - no help to you, eh?

There are a number of SAE papers covering this. e.g.
http://www.sae.org/technical/papers/852116
http://www.sae.org/technical/papers/2000-01-1712

--
Geoff
The Sea Hawk at Wow Way d0t Com
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