Watch out for the closed throttle over run. The vacuum will jam most
mechanisms. Just give it some thought.

Paul, I was thinking about this idea. I got a flash, how about a 
curved slide throttle. You had the idea for your turbo using
the bearings. The Micuni and Kehin "flat slide" motorcycle carbs 
use the same set up. Two sets of opposed bearings on the curve
using a stiff 304 or 321 slide would do it. Use a negatorr spring 
for constant force. I'll see if I can do a drawing later. Bill
Jepson

All this is good for a car but for an airplane it is kind of a waste
of time and money as aircraft engines run wide open throttle 95%
of the time.

Paul Lamar
 
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