File talk:Machine à Vapeur en LEGO.gif

It does not look like a steam engine, which is a sort of combustion engine, as no combustion takes place there. --Jan Kameníček (talk) 00:28, 7 January 2019 (UTC)

The YouTube video is nicer (dynamic, and with sound). --Furfur ^{⁂ Diskussion} 01:40, 7 January 2019 (UTC)

Hello ! Jan Kameníček wrote "It does not look like a steam engine, which is a sort of combustion engine". No: a steam engine can operate with any kind of pressurized gas: If you live in Iceland, you can recover steam from the ground to run a steam engine (and this steam is not produced by combustion). In fact the engines can be either "internal combustion" (car engines) or "external combustion" (such as steam engine and Stirling engine).

Furfur wrote : "The YouTube video is nicer (dynamic, and with sound)". Yep. Racconish tell me that I should edit this video in the Commons, under CC-BY-SA license. But I do not know if I kept the right to do it by accepting the publication in YouTube... Regards, Bernard de Go Mars (talk) 10:01, 7 January 2019 (UTC)

@Bernard de Go Mars: Hi. As I understand it, external combustion is still combustion. Steam acquired through Earth's internal heat is probably an exception, though the process is in fact very similar, so let's change the word "combustion" for "heating". Steam engine requires an external source of heat to produce pressurized gas. Imo it cannot be called a steam engine if the pressurized gas is acquired through other means than heating: "Steam engine is a heat engine that performs mechanical work using steam as its working fluid."

This does not mean that the video is bad – in fact it is excellent. It is a video of a perfect model built in a very simple and educating way, imitating the mechanical movements of a steam engine, ... but it is not a steam engine. --Jan Kameníček (talk) 14:35, 7 January 2019 (UTC)

Bernard de Go Mars, if you are the original copyright holder of the video, then you can upload it wherever you like. Putting it on YouTube first is irrelevant, you still hold license over the original file. You could even change the license at YouTube to Creative Commons if you want. — Huntster (t @ c) 16:55, 7 January 2019 (UTC)

Thanks, Hunster. I'll see what I can do. I must also find the original video. Regards, Bernard de Go Mars (talk) 09:55, 8 January 2019 (UTC)

It is done. As usual, it was a assessment, but it's done. I find the weight of the .webm file very light (which is a quality!). Friendly, Bernard de Go Mars (talk) 13:39, 8 January 2019 (UTC)

Licence Problem

And the difficulties continue since it appears that there is a problem of license (which I do not know how to solve). If someone has an idea... Regards, Bernard de Go Mars (talk) 14:00, 8 January 2019 (UTC)

Bernard de Go Mars, referring to File:Machine à vapeur LEGO bicylindre; Steam machine LEGO twin-cylinder.webm, I directly edited the description page and transferred description, license and categories from File:Machine à vapeur LEGO bicylindre; Steam machine LEGO twin-cylinder.webm.360p.webm. Now that this is done, would it be okay to remove the lower resolution version? — Huntster (t @ c) 03:21, 9 January 2019 (UTC)

Thanks for everything, Huntster! This page is very beautiful. But I dont understand your words : "would it be okay to remove the lower resolution version?". For me, there is only one webm resolution (in addition to the .gif animation) and these two files can have a different use... Regards, Bernard de Go Mars (talk) 11:00, 9 January 2019 (UTC)

Bernard de Go Mars, there are two video files, File:Machine à vapeur LEGO bicylindre; Steam machine LEGO twin-cylinder.webm.360p.webm at 360p and File:Machine à vapeur LEGO bicylindre; Steam machine LEGO twin-cylinder.webm at 480p. — Huntster (t @ c) 15:27, 9 January 2019 (UTC)