Wikipedia:Featured picture candidates/Internal Combustion Engine

An excelent animation of an internal combustion engine, which I discovered accidentally while working on improving a different page. I think this is simply awesome. This originated on the commons.

• Nominate and support - TomStar81 03:09, 11 February 2006 (UTC)[reply]
• Support wholeheartedly. Very good animation. Would be better if it was flash-based but still worthy. Diliff | (Talk) (Contribs) 04:35, 11 February 2006 (UTC)[reply]
• Comment: An explanation of what's going on, and what the colors are, would be helpful. - JPM | 05:37, 11 February 2006 (UTC)[reply]
  • Sure thing. 1) Gasoline enters the cylinder through the valve on the right. This valve is then closed. 2) The gas is compressed until it combusts. 3) The explosion from the gas pushes the cylinder down. 4) The left valve opens, allowing the exhaust gases to escape. This valve closes, and the cycle repeats. TomStar81 05:51, 11 February 2006 (UTC)[reply]
    • As this is a petrol engine, the description should be: 2) The gas is compressed until the spark plug causes it to combust. Or words to that effect. | Spaully

The entire process illistrated here is explained in words in the article Four-stroke cycle. This should make the desccription of the animation easier. TomStar81 19:53, 11 February 2006 (UTC)[reply]

• Support -- This is a superb animation, as good as any on wikipedia in my opinion. As mentioned by JPM it needs a thorough explanation though. In addition to the information put forth by TomStar81 something needs to be said about how the valves are actuated by the cams. The explanation would be excessive for what could fit into the caption and a section of the article needs to be created to explain this animation. Meniscus 06:57, 11 February 2006 (UTC)[reply]
• Support Calderwood 09:04, 11 February 2006 (UTC)[reply]
• Support. This is exceptional. Mstroeck 09:22, 11 February 2006 (UTC)[reply]
• Support. Very good image, but should be inserted in articles with an explanation, similar to Toms. | Spaully
• Support. Very good animation. It would be nice, if it ran a little slower. That would make it easier to grasp what is happening in which cycle. As well as a better visualization of the flow direction of the gas. If a vector-based model existed, an animation using SVG might be created from it (just an idea). Mikeo 12:24, 11 February 2006 (UTC)[reply]
• Oppose - I would much prefer it if the petrol flow went from left to right. And I've seen better animations of the same process elsewhere. The image aliasing as mentioned below is also pretty poor. - Hahnchen 15:32, 11 February 2006 (UTC)[reply]
• Oppose. It's not bad, and illustrations like these do improve understanding. However, I find the lack of arrows indicating flow direction troublesome, as with the speed. enochlau (talk) 15:52, 11 February 2006 (UTC)[reply]
• Support. Outstanding animation -- Chris 73 | Talk 17:19, 11 February 2006 (UTC)[reply]
• Support. First, it looks cool. Second, it clearly illustrates what is going on in a combustion engine. Featured picture? Why not? - Alanmak 22:17, 11 February 2006 (UTC)[reply]
• Remark: Similar image (on the same page) is already featured. zafiroblue05 | Talk 04:18, 12 February 2006 (UTC)[reply]
• Support. The animation really makes it clear. I like the classic Miller DOHC configuration and finned sump. It can represent either a four valve or a two valve. Color shows pressure as well as temperature. The counterweight's function is made obvious. On the other hand, the compression ratio appears unreasonably high. David R. Ingham 07:15, 12 February 2006 (UTC)[reply]
• Support Flcelloguy (A note?) 15:45, 12 February 2006 (UTC)[reply]
• Oppose. As David pointed out there should always be a little space left above the piston, also the existing FP is part of a series which shows the process less cluttered and with clearer illustrations. --Dschwen 17:23, 12 February 2006 (UTC)[reply]

Uh, and it is also available as an animation! Image:FourStrokeCycle.mpg --Dschwen 17:25, 12 February 2006 (UTC)[reply]

• Support very detailed. --Lewk_of_Serthic 22:48, 12 February 2006 (UTC)[reply]
• ( + ) Support --Fir0002 00:41, 13 February 2006 (UTC)[reply]
• Comment. Aren't pistons usually flat on top? --Aqua 16:23, 14 February 2006 (UTC)[reply]
• Oppose - Animation is good but image aliasing is horrendous.--Deglr6328 05:35, 15 February 2006 (UTC)[reply]
  • Changing vote to oppose because as Janke notes, the piston does seem to show an unbelieveably high ratio of compression and that is scientifically inaccurate and misleading.--Deglr6328 21:24, 18 February 2006 (UTC)[reply]
• Oppose. Good animation. But: needs anti-aliasing, color bands inside the cylinder are distracting and for some reason the piston flashes in stroke 2 and 4. WP 09:17, 18 February 2006 (UTC)
• Oppose - I never thought I might oppose an animation this good (I can live with the aliasing), but the technical inaccuracy (infinite compression!!!) compels me to. --Janke | Talk 09:28, 18 February 2006 (UTC)[reply]
• Oppose, not entirely accurate and we already have an FP for this. BrokenSegue 14:10, 18 February 2006 (UTC)[reply]
• Comment - Is spark from the spark plug blue? What's the temperature like?
• Oppose, I believe I've seen a better version of something like this. gren グレン 07:48, 19 February 2006 (UTC)[reply]
• Support Beautifully executed. I do not think that SVG or Flash would be better. SVG isn't widely supported enough, and Flash is a potential vector for viruses (which means that people using secure systems often have Flash disabled or not even installed). Agateller 13:04, 20 February 2006 (UTC)[reply]
• Support Mayamaxima 08:04, 21 February 2006 (UTC)[reply]
• Support Excellent image and would be good with explanation about the 4 steps. sikander 01:35, 25 February 2006 (UTC)[reply]

Promoted Image:4-Stroke-Engine.gif: there are exactly twice as many supporters as opposers, which is what I tend to use as my guideline. This was a very close result. Raven4x4x 07:53, 25 February 2006 (UTC)[reply]

• Comment: Hi - I am UtzOnBike, the creator of this animation. Thanks to all supporters. But here some explanations: 1. This animation was done for the german wikipedia, where it is part of an explanation in text. 2. Of course, some arrows would help - but I do not like arrows in my animations. 3. This animation was done with Autodesk Inventor, a CAD programm. So it is all 3D, but the graphic is not optimized for animations (-> alising). 3. The compression is definitely not infinite! But in pixels, it looks like. 4. The spark itselfes is blue - but looks different (a thin line). 5. There are pistons in a lot of shapes. Some are flat on top, some are roof-shaped (as shown here), some have other shapes. It depends on valve angle, compression, position of spark plug, ... Thanks to all! UtzOnBike (--85.183.209.19 20:34, 11 October 2006 (UTC))[reply]