English: Animated scheme of a four stroke internal combustion engine, Otto principle: #Suction stroke - Air and vaporised fuel are drawn in. #Compression stroke - Fuel vapor and air are compressed and ignited. #Power stroke - Fuel combusts and piston is pushed downwards. #Exhaust stroke - Exhaust is driven out.
Reason
Suggested replacement, a much larger version is also available.A superior version of this animation is now available.
Presumably because it would disadvantage those with a slow connection, as with animated gifs, the full size file may have to be loaded before it can be viewed in the article. On a 56k connection, well, you work it out! :) Papa Lima Whiskey (talk) 13:25, 18 August 2010 (UTC)[reply]
Delist and replace - Remembering that the full-size version gets the star; the one seen here gets {{FPlowres}} Adam Cuerden(talk) 01:46, 21 August 2010 (UTC)[reply]
Please notify the original uploader/nominator. Thanks. Makeemlighter (talk) 02:52, 22 August 2010 (UTC)[reply]
Keep. Anti-aliased gifs should not have transparent backgrounds. The new graphic looks bad on top of any color - On white, the edges are aliased; on black the text is unreadable. The new gif should be on a solid background so that the edges can be properly aliased. Alternately, it should be converted into an animated PNG. Kaldari (talk) 00:56, 26 August 2010 (UTC)[reply]
Comment I just notified the nominator (see this), so let's hold this open until he has the chance to comment. If anyone knows some German, feel free to contact the creator UtzOnBike. He actually commented on the original nomination as an IP user, so he might want to comment here. Makeemlighter (talk) 01:19, 26 August 2010 (UTC)[reply]
Keep without prejudice The original nomination laid out a few points that were incorrect, and the newer animation does address the matter of the flow of fuel with the use of arrows, however both images still suffer from a factual inaccuracy in that they compress to the point of infinity, which in real life would not happen. The fact the newer image retained this incorrect element is regrettable, and it for this reason that I have chosen to oppose the delisting of the current version. The first time around this matter was brought up but the image passed since it the technicality was already present in animation, but the newer version was uploaded less than a month ago and should have addressed this issue during the creation phase. I am open to supporting the new version, but if we are going to have a new FP on the matter then we owe it to both ourselves and to wikipedia to get the animation details right. TomStar81 (Talk) 02:20, 26 August 2010 (UTC)[reply]
If both animations are inaccurate, we should feature neither of them. J Milburn (talk) 08:23, 26 August 2010 (UTC)[reply]
It is easy for me to correct this, what sort of volume should be left at maximum compression? - ZephyrisTalk 17:17, 26 August 2010 (UTC)[reply]
To be brutally honest, I do not know, but if you were to ask someone active in an automobile related project they could probably tell you you much space should be left at the top of the piston. @Zephyris: true, neither should be FP, but last time around the voting parties managed to produce 66% support for the image, which is why it got a star. We added a notice about the inaccuracy of the image to the POTD template as I recall, but since someone has gone through the trouble of making a new one I want to make sure we correct past mistakes so the newer version will be correct in all respects. TomStar81 (Talk) 21:16, 26 August 2010 (UTC)[reply]
Compression ratio says 1:10 is a typical compression ratio so I can redesign this animation to take that into account... It will take a long time to re-render though so don't hold your breath! - ZephyrisTalk 13:55, 28 August 2010 (UTC)[reply]
Comment The animation has been corrected for a compression ratio of 1:10. - ZephyrisTalk 12:37, 29 August 2010 (UTC)[reply]
Replaced with File:4StrokeEngine Ortho 3D.gif —Maedin\talk 18:18, 29 August 2010 (UTC)[reply]
