06-05-2011, 08:16 AM
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#62
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Rotary Fanatic
Join Date: Feb 2008
Location: Slidell, LA
Posts: 191
Rep Power: 18
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Quote:
Originally Posted by Libor
Bump this up.
Barry, are you going to do some tests with tighter or zero split?
Also I think there is slight misconception when should peak pressure occur. IIRC at 45° ATDC, rotor has most mechanical leverage over e-shaft, but peak pressure for optimal efficiency should occur much earlier.
Otherwise best of luck with your testing
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Libor and DOHC,
You know how the rotor moves at 3:1 ratio to that of the eccentric shaft. That seems to be the sweet spot for the rotary, that is, 15º times 3 or 45º. This latest run with the new sensor has gone to 1000 psi for the first time. But the highest pressures seem to be around 45º. I think I am seeing a slight deviation in this with rpm.
But I have exactly the same thoughts as you. Looking at the chart, if we could have the ignition pressure rise as a continuation of the initial compression curve it would seem to be logical.
Barry
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