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#1
June 10th 09, 06:39 AM
posted to rec.aviation.homebuilt
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ENGINE BASICS
(deleted)
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#2
June 16th 09, 07:54 PM
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[quote='Veeduber[_2_];695919']To All:
For example ALL engines have some degree of overlap in their cam timing. If you have a text book that says otherwise, it is in error. No Not all engines have overlap, not early rotary radials with one pull/push rod operating the single rocker between the valves, opening one valve at the time, the valve clearence make it impossible to open both at the same time. Jan
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#3
June 17th 09, 03:58 AM
posted to rec.aviation.homebuilt
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ENGINE BASICS
On Tue, 16 Jun 2009 19:54:20 +0100, Jan Carlsson
wrote: 'Veeduber[_2_ Wrote: ;695919']To All: For example ALL engines have some degree of overlap in their cam timing. If you have a text book that says otherwise, it is in error. No Not all engines have overlap, not early rotary radials with one pull/push rod operating the single rocker between the valves, opening one valve at the time, the valve clearence make it impossible to open both at the same time. Jan And then there is the "atmospheric" intake valve.
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#4
June 29th 09, 07:49 AM
posted to rec.aviation.homebuilt
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ENGINE BASICS
Jan And then there is the "atmospheric" intake valve. AKA "Wheeze valve" really worked great in 200 rpm Vaughn Garden Tractors. Knight sleeve valve engines suffered from carbon build-up in the sleeve's ports. Oil and fire took their toll. 60 years back, Ford flatheads didn't need headers. just dispense with exhaust manifolds. (neighbors withstanding) Old Chief Lynn
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