Moderator: MudBug
wildcatter wrote:...snip...as gas is going into the tube, other gases, stored at the exit end, is being pushed out of the tube, at the same rate.
Hoot wrote:wildcatter wrote:...snip...as gas is going into the tube, other gases, stored at the exit end, is being pushed out of the tube, at the same rate.
Yes, but it's a gas, not a non-compressable liquid. The impedance of a longer tube is higher than a shorter tube for the same gas pressure front. Increase the impedance and delay will occur, all else being kept the same. Whether it accomplishes what you need it to, would require real-time evaluation. I don't think we can dismiss it on face value though. Someone send gunnut one of those pigtail and one of those switchback tubes and lets see a pressure trace comparing them to a plain tube. IIRC, his traces capture the bolt cycle as well. Easy metric.
Hoot
wildcatter wrote:So True, but I didn't really want to get into such a detailed explanation, especially for real world results, that don't make any real difference. In other words, the gains of the pigtail, in regard to dwell time, is negligible, to non-existent. I can see it on my pressure trace, but holy-cow, it's measured in tenths of a nano-second or there-in about..
..t
Hoot wrote:wildcatter wrote:So True, but I didn't really want to get into such a detailed explanation, especially for real world results, that don't make any real difference. In other words, the gains of the pigtail, in regard to dwell time, is negligible, to non-existent. I can see it on my pressure trace, but holy-cow, it's measured in tenths of a nano-second or there-in about..
..t
Agreed WRT the pigtail type. Have you done any work with the one that folds back upon itself to actually add length to the path? I seem to recall seeing a picture of one somewhere. It's all mental chewing gum as the obvious choice is to relocate the port. The challenge is coming up with a near port gas block with a back entry hole for the far port and the ability to switch between the two, while cutting the other off. All that and not be too imposing. It can be done, but determining enough demand for one to justify the tooling becomes a bit of a challenge, for such an esoteric pursuit.
Hoot
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