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Forums10
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Jul 28th, 2025
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Joined: Feb 2009
Posts: 7,711 Likes: 346
Sidelock
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Sidelock
Joined: Feb 2009
Posts: 7,711 Likes: 346 |
If a pressure wave theory is valid, Doc Drew cited above that it can be reflected. Maybe, rivelling and other bulges can occur by random additive wave interference, and not necessarily an obstruction. Classic game guns may be intentionally struck or may acquire unintentional hoop strength reductions that just aren't seen as commonly in thicker and tougher modern barrels. Could that make them a bit more susceptible to a random wave amplitude that might approach double of what was intended?
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Joined: Feb 2004
Posts: 13,883 Likes: 19
Sidelock
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Sidelock
Joined: Feb 2004
Posts: 13,883 Likes: 19 |
This discussion reminds me of the sonic shockwave effects on 2 cycle tuned expansion chamber type exhaust pipes. The sonic shockwave has enough energy to actually reverse the exhaust flow of an over scavenged cylinder, and push the mixture back thru the exhaust port, into the cylinder, effectively supercharging it. There are some common gas dynamics effects. The elevated temperature raises the local speed of sound significantly in both cases.
Last edited by Chuck H; 03/12/18 01:28 AM.
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Joined: Jan 2006
Posts: 15,462 Likes: 89
Sidelock
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Sidelock
Joined: Jan 2006
Posts: 15,462 Likes: 89 |
At least you know what you're talking about...
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Joined: Dec 2006
Posts: 582
Sidelock
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Sidelock
Joined: Dec 2006
Posts: 582 |
This discussion reminds me of the sonic shockwave effects on 2 cycle tuned expansion chamber type exhaust pipes. The sonic shockwave has enough energy to actually reverse the exhaust flow of an over scavenged cylinder, and push the mixture back thru the exhaust port, into the cylinder, effectively supercharging it. There are some common gas dynamics effects. The elevated temperature raises the local speed of sound significantly in both cases. Wow, did that ever bring back motocross memories from 40 years ago! Mike
Tolerance: the abolition of absolutes
Consistency is the currency of credibility
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Joined: May 2016
Posts: 1,548 Likes: 343
Sidelock
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Sidelock
Joined: May 2016
Posts: 1,548 Likes: 343 |
Yeh, having the motor/engine running as they say "on the pipe".
Karl
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Joined: Feb 2009
Posts: 7,711 Likes: 346
Sidelock
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Sidelock
Joined: Feb 2009
Posts: 7,711 Likes: 346 |
Reminded me of the smell of Klotz, hadn't thought of that for quite a bit.
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