Talk:Ceiling (aeronautics)

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Jepp defines it as the pressure altitude instead of the density altitude where you can only do 100fpm. Density altitude would make sense, but not sure.... Any thoughts?

Jepp notes that if a service ceiling is presented in terms of pressure altitude, it must be corrected for nonstandard temperature and humidity - which is equivalent to a density altitude conversion. From an aerodynamic standpoint, density altitude is all that matters unless you have some sort of intake charge cooling system such as a relatively complex intercooler system.


There is little reason to have two articles on ceilings. It's worth noting that Wikipedia is not a dictionary and so having exactly one article on ceilings in aviation is probably the best. Pdbailey 01:23, 21 June 2007 (UTC)

What name do you suggest for the planned merged page? Snowman 08:20, 21 June 2007 (UTC)
I just ran across these two pages and thought they were organized like a dictionary and not an encyclopedia, so I proposed a merge. As far a renaming, I've got nothing. Pdbailey 12:58, 21 June 2007 (UTC)

I agree totally, they are both dictionary like entries, and it would be able to be merged quite easily. I may do this at some point. Tjnewell 10:39, 3 July 2007 (UTC)

I think Pdbailey has already found an apt name for the merged article – "Ceilings in aviation"! Alternatively, how about "Ceiling (absolute and service)"?
Also, there are a couple of things that I would like to comment on: firstly the article mentions "the single best rate of climb airspeed" – surely there can't there be more than one best, or does it just refer to there being a single engine providing propulsion? Secondly, the "Absolute ceiling" article provides the following description: "The service ceiling is a more practical value and is used more often. It usually refers to the altitude above which the cabin pressurization system can no longer maintain a sufficient oxygen level for passengers and crew, and where the pressure differential is so great as to put severe stress on the pressure cabin of the aircraft." – a bit different to the definition given in this article, so if a merge is to take place some concensus is needed. I hope I don't appear to be nit-picking, I'm just a bit confused.--Red Sunset 21:08, 22 July 2007 (UTC)

I performed the merge and move. Clearly some additional text at the top and to smooth out the introduction to each ceiling would be nice. I'd provide it if I knew more. Pdbailey 00:36, 25 July 2007 (UTC)

That's better, the wording of the original "Absolute ceiling" page was a bit misleading, and now the article makes sense. I've removed the "single" from the "best rate of climb airspeed" OEI definition to avoid confusion.--Red Sunset 08:56, 25 July 2007 (UTC)

WikiProject class rating[edit]

This article was automatically assessed because at least one WikiProject had rated the article as start, and the rating on other projects was brought up to start class. BetacommandBot 09:45, 10 November 2007 (UTC)

References needed[edit]

I'm unable to track reliable references for some definitions in the article, including the ones I've just added/modified (dynamic ceiling, combat ceiling). I know these are widely used definitions, but I can't track specific sources. If anybody can help, please do so by adding references to the article. cherkash (talk) 00:06, 18 August 2010 (UTC)