Talk:Nutating disc engine

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A fact from Nutating disc engine appeared on Wikipedia's Main Page in the Did you know? column on 12 December 2007.
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[edit] Oil, seals and other such facts of life

The NASA report 214342 mentions that the running time of the engine was brief in order to minimise wear. Figure 4 shows a quite incredible array of seals. How are these things lubricated? Greg Locock (talk) 22:07, 31 December 2007 (UTC)

The Mcmaster engine runs on pure hydrogen (OK) and pure oxygen. Have you seen what an oxygen bottle looks like? Have you tried to get one shipped by road or plane? How much of the weight advantage of the engine will be lost in providing a crashprroof O2 cylinder? Greg Locock (talk) 09:46, 1 January 2008 (UTC)

[edit] Use of bold

Do we really need to use bold to emphasise the phrasing in the article? It's a little patronising...Dick G (talk) 05:20, 12 December 2007 (UTC)

[edit] Patent number

The patent number listed in the article is wrong. The article lists patent number 85619, which is for a manure spreader from the mid-1800s. However, patent number 5,251,594 for a "nutating internal combustion engine" was issued to a Leonard Meyer of Illinois. Could someone more knowledgeable check that this is actually the device referenced in the article? —Preceding unsigned comment added by 209.94.128.86 (talk) 05:54, 12 December 2007 (UTC)

See this too. That page suggests that the patent application number was 85619, but that the US patent number itself is 5482449. Confused? Carre (talk) 09:00, 12 December 2007 (UTC)
5,482,449 is a patent for a nutating disk compressor. 5,251,594 is for a nutating disk internal combustion engine. I have donloaded the patent document (pdf) for the engine from the US Patent and Trademark Office. This is the primary source for the device and should have been cited in the article. Since, although it is in the public domain, the USPTO charges a copying fee ($3), I think I would like to provide this document to Wikipedia. Would it be appropriate to upload it to Wikisource? It is 36 pages long.
To change the topic slightly, I have noted that the administrators insist on sources for articles, but do not seem to be able to differenciate between sources on the basis of quality. Inferior citations are frequently allowed, when better ones could be found with a little effort. Too Old (talk) 02:08, 13 December 2007 (UTC)