Engine infobox refactor

Merge all usages into ((Infobox engine)).

Split off other data to spec templates. Maybe offer the specs as nested templates?

Already uses the politically correct header(n), label(n) and data(n).

Infobox engine

Add image_size, alt, type parameters.

Discussion/consensus needed: Should image_border and/or long_caption also be added, for compatibility with Aircraft begin?

Engine infoboxes merge (draft)

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What is needed is a TfD or two to clean out the messes, before going ahead with this TfM

The idea is to merge all these into a single template. ((Infobox engine)) is the obvious page title, so merging the others into it looks the way to go.

However several of these templates, including the destination one, include technical details which appear to go against the spirit of WP:INFOBOXPURPOSE, if not the letter. But that tech stuff should not be deleted or ignored, it needs to be moved to a better home. This should be done before the templates are merged. Templated in-article sections on the engine specification are used for aero engines, including ((pistonspecs)), ((jetspecs)), ((rocketspecs)) and ((electricspecs)), so these might point a way forward, although the adopted solutions are not within scope of this RfM.

The purpose of this RfM is to reach a consensus on whether the merge is, in itself, to be proceeded with or not.

To summarise the infoboxes in scope (if there are more, I cannot find them):

((Infobox engine)). This is the natural destination, but currently almost entirely comprises technical information on piston engine types.
((Infobox aircraft engine)). Conforms well to WP:INFOBOXPURPOSE, but lacks header information which has to be supplied by ((Infobox aircraft begin)).
((Infobox aircraft begin)). Comprises header information used for all aircraft-related infoboxes. However its use with other aircraft infoboxes has been deprecated and ((Infobox aircraft engine)) is the only one for which consensus to use it is still extant.
((Infobox historic engine)). Used for individual museum pieces, especially steam engines. Includes a modest amount of technical information which would need to be moved out. Also includes a module parameter intended to embed sub-templates, but it is not clear to me whether this is ever actually invoked.
((Infobox rocket engine)). Primarily intended for space rockets. Includes more technical parameters even than ((rocketspecs)), so that anomaly needs to be ironed out.
((Infobox Automobile engine)). Redirects to ((Infobox engine)), so needs no change. But the pages which transclude it will.

Step 1: Merge "begin" template into aero engines

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Before getting started, wait for the clone/merge into ((Infobox aircraft)) to see how it deals with deprecated fields, e.g.:

image_border

size

Merge across non-deprecated fields from ((Infobox aircraft begin)), which are missing in ((Infobox aircraft engine)). These include the following, together with any of the above which may be kept:

name

image

image_size

alt

caption

long caption

Step 2: Add new fields to ((Infobox engine))

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Engage at Template talk:Infobox engine to confirm merge in principle, and agree the fields to be merged.
Add fields to ((Infobox engine)) and test.
Go live.

Current engine infobox fields

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((Infobox aircraft))	((Infobox aircraft begin))	((Infobox engine))	((Infobox historic engine))	((Infobox rocket engine))
name image - image_size alt image_caption long_caption	name image image_border size, or image_size alt caption long caption	name image - - - caption -	name image - image_size alt caption -	name image - imsize - caption -
	((Infobox aircraft engine)) type national origin manufacturer designer design group builder first run major applications status produced number built developed from variants with their own articles developed into	- manufacturer aka - - - - production predecessor successor -	- designer maker date country_of_origin - - purpose former_operator collection location coordinates accession preservation_date working url	type country of origin designer manufacturer date first flight last flight purpose status used_in predecessor successor associated references notes
		configuration displacement bore stroke block head valvetrain timing compression operating principle supercharger turbocharger turboboostpressure fuelsystem management fueltype oilsystem coolingsystem idle redline power specpower torque length width height diameter weight emissions level emissions control	dimensions weight cylinders bore stroke flywheel diameter operating_pressure max_pressure power module	fuel oxidiser mixture_ratio grain core casing nozzle cycle pumps description combustion_chamber nozzle_ratio thrust thrust(Vac) thrust(SL) thrust_at_altitude throttle_range thrust_to_weight_ratio specific_impulse specific_impulse_vacuum specific_impulse_sea_level total_impulse mass_flow burn_time restarts gimbal capacity tankage dimensions length diameter dry_weight