Limit Found on a Marauder Poppet

[SeanMP]

I'm not entirely convinced the two are really all that different. Yes the PCP is operating at 200 bar but we have seen, I'm sure, the Ping pong ball blow a hole through the paddle like it was made of tissue paper. The energy released was as a result of vacuum. Which is also causing the flow on the intake side of an engine.
To me working fluids are working fluids. Flow is flow. We frequently use wet flow models to study air flow because we can more easily see and describe what we are actually seeing.

The whole science of flow and fluid dynamics is nowhere near in the bag yet. If it was we wouldn't be spending millions every year designing and testing new theories and making great strides in ship design and even wing design. Shocking we still don't know everything there is to know about a silly wing.
Ultimately what I'm trying to say is I think there are a lot more chapters to be written in the flow book.

[rsterne]

Fortunately.... Life would be VERY dull if we didn't have anything left to learn.... *grin*....

Bob

[Motorhead]

Sure am intrigued by the Theoben type valves ( AKA: taper seat automotive head types )
Recently working with a HATSAN AT44 platform, again find myself working with this type seat/poppet design.



What I DO NOT understand at this point is why a valve seat/ poppet of this smaller design and area is seemingly able to flow the volume of what appears to be larger in a more conventional poppet as Bobs is sharing ??/

Yuppers .... learning every day 

[bstaley]

Easier to open, reaches full flow faster......once the pellet starts moving flow has diminishing returns over time.

[rsterne]

If you are stating that tapered valves are easier to open, that has not beem my experience, or that of many that mave tried them.... They tend to wedge into the seat.... This is obviously not as much problem in a car engine with steel valves and seats.... and Sean's PEEK with a very narrow seat will help that situation as well....

Bob