Talk:Ceiling (aeronautics)

	Physics portal This article is within the scope of WikiProject Physics, a collaborative effort to improve the coverage of Physics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.PhysicsWikipedia:WikiProject PhysicsTemplate:WikiProject Physicsphysics articles
Low	This article has been rated as Low-importance on the project's importance scale.
	This article is supported by Fluid Dynamics Taskforce.

Aviation C‑class

This article is within the scope of the Aviation WikiProject. If you would like to participate, please visit the project page, where you can join the project and see lists of open tasks and task forces. To use this banner, please see the full instructions.AviationWikipedia:WikiProject AviationTemplate:WikiProject Aviationaviation articles

C

This article has been given a rating which conflicts with the project-independent quality rating in the banner shell. Please resolve this conflict if possible.

This article has been checked against the following criteria for B-class status:
Referencing and citation: criterion not met Coverage and accuracy: criterion met Structure: criterion met Grammar and style: criterion met Supporting materials: criterion not met

Jepp definition

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.

merge

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)[reply]

What name do you suggest for the planned merged page? Snowman 08:20, 21 June 2007 (UTC)[reply]

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)[reply]

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)[reply]

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)[reply]

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)[reply]

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)[reply]

WikiProject class rating

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)[reply]

References needed

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)[reply]

I don't see any definitions for dynamic ceiling or combat ceiling - have these been removed? It would be useful to have these variations included. Also, Some unpressurized combat planes (example Sukhoi Su-25) have a practical ceiling which is much less than its service ceiling. Santamoly (talk) 03:57, 22 October 2018 (UTC)[reply]