Talk:Piston effect

External links modified
Hello fellow Wikipedians,

I have just added archive links to 1 one external link on Piston effect. Please take a moment to review my edit. If necessary, add after the link to keep me from modifying it. Alternatively, you can add to keep me off the page altogether. I made the following changes:
 * Added archive https://web.archive.org/20120217004746/http://sciencelinks.jp/j-east/article/200622/000020062206A0880005.php to http://sciencelinks.jp/j-east/article/200622/000020062206A0880005.php

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Cheers.—cyberbot II  Talk to my owner :Online 12:40, 25 January 2016 (UTC)

Merge Tunnel boom into/and Piston effect?
The articles overlap and do not link to each other. The effects are so closely related that merging would make sense. --Mopskatze (talk) 12:39, 17 April 2017 (UTC)


 * I agree; I'll go ahead and merge the two articles since nobody seems to object. Peter Beard (talk) 08:37, 24 June 2017 (UTC)


 * Please modify the links to other languages too. "Tunnel boom" had some links, but the lemma is not used any more. --83.228.190.62 (talk) 21:24, 6 December 2017 (UTC)

TGV-tunnel against Piston effect?
Special entrance hoods need holes in the hood or special sound absorbing material or a form "like a trumpet" or .... So why this image shows a special hood against Piston effect? For me it looks like a standard hood, a little bit longer than the tunnel to protect the track against falling stones and other stuff. ... ??? — Preceding unsigned comment added by 83.228.190.62 (talk) 21:29, 6 December 2017 (UTC)