G'day Gizmo,
Hi all.
As NormK seemed to have found a solution to his problem shouldn't this be a new topic.
As far I I was aware that smaller hole restricted version is part of the suction vacuum caused once engine is up n running. Similar to a cars brake booster. This keeps the decompression valve shut during operation. Changing the size of this hole changes the strength of atmospheric force. So my point is at initial start up before any vacuum can start happening is the point where these engines are difficult to start.
No, it doesn't, actually.
What it
does do is, to lengthen the
time it takes for the deco system to reach either of the two possible 'static states' it has; i.e. of a fully closed,
or fully open, valve. The actual system pressure, that
above the decompressor diaphragm, basically reaches a 'constant value' as either of these 'static states' is attained.
No criticism or 'dissing' intended here, in any way; it's just that to comprehend fully what's happening here, you really need to have a decent understanding of Fluid Mechanics, and the difference between 'static pressure' and 'dynamic pressure' - not to mention the Bernoulli Equation.
Thanks to my 'misspent past'
, I do have the 'disadvantage' here, of having a Chemical Engineering qualification [our Forum Historian CyberJack can confirm this, if there's any doubt]. Which included the study of Fluid Mech, as it incorporates 'essential concepts' for Chem Eng...
