Wikipedia:WikiProject Aircraft/Categories

Primary categorisation

Primary categorisation is three-fold, by nation, primary role, and era. The tree expands out as (for example):

British fighter aircraft 1930–1939

+British fighter aircraft

+British military aircraft

+British aircraft

+United Kingdom

+Aircraft by country

+Aircraft

+Military aircraft

+Aircraft

+Military equipment

+Fighter aircraft

+Military aircraft by type

+Military aircraft (as above)

+Aircraft by type

+Aircraft

+British military aircraft 1930–1939

+British military aircraft (as above)

+Military aircraft 1930–1939

+Military aircraft (as above)

+Aircraft 1930–1939

+1930s

+Aircraft by era

+Aircraft

+Fighter aircraft 1930–1939

+Fighter aircraft (as above)

+Aircraft 1930–1939 (as above)

Nation

Simply stated, the nation that the aircraft was manufactured in. For the vast majority of types, this works without any further qualification.

More specifically, it is the nation in which the manufacturer was headquartered in at the time that the aircraft was first produced. Thus, Dornier aircraft of the 1920s are still listed as Category:Aircraft manufactured in Germany, even though they were actually being assembled in Italy. Learjet aircraft before 1991 are listed as Category:Aircraft manufactured in the United States, but as Category:Aircraft manufactured in Canada after the company was purchased by Bombardier.

International aircraft

Aircraft manufactured by international consortiums (such as Airbus), and aircraft built as one-off joint ventures (such as the Concorde) are listed as Category:International aircraft.

Defunct nations

Special cases apply when the manufacturing nation no longer exists in the form that it did when the aircraft was first produced.

Soviet and Russian aircraft The nationality shown in categories depends on the era: For example, Category:Soviet airliners 1960–1969, but Category:Soviet and Russian airliners 1990–1999, and Category:Russian airliners 2000–2009. Pre-USSR Russian aircraft will follow the reverse pattern, the change happening for the decade 1920–1929.

Czech and Czechoslovakian aircraft - similar distinction as for Soviet/Russian aircraft above, with the change happening in the decade 1990-1999.

Yugoslav and Serbian aircraft - similar distinction again. The changeover is again in the decade 1990–1999.

Chinese aircraft are a slightly different case - from decade 1940-1949 onwards, aircraft of the People's Republic of China are distinguished from aircraft of Taiwan. These subcategories exist in parallel. For example, the (still empty) Category:People's Republic of China military aircraft 1990–1999 would exist side-by-side with Category:Taiwanese military aircraft 1990–1999.

We will eventually require similar distinctions for Category:Austro-Hungarian aircraft.

Known problems

"International" is a problematic description, since when combined with a role, it can produce ambiguous category names such as Category:International airliners. Does this mean airliners that have an international range?

Sometimes, an aircraft's primary (or even exclusive!) user may be different from its nation of manufacture. Readers may be surprised (or outraged) to find the CF-18 Hornet classified as US, and the C-7 Caribou classified as Canadian.

Role

Role categories are intentionally quite broad - the danger of over-precision would be the creation of multiple, closely-related categories with only very hazy (or semantic) borders between them.

The main distinction lies between Category:Military aircraft, Category:Civil aircraft, Category:Experimental aircraft, and the (still problematic) Category:Special-purpose aircraft. Where aircraft are used by both civil and military operators, they should be classified under both trees.

Most, if not all, aircraft have been used in multiple roles. This classification is based on the primary role they were designed for. Sometimes, this role will incorporate other roles, for example patrol aircraft will generally have anti-submarine capabilities, but Category:ASW aircraft should be reserved for dedicated ASW aircraft. All airliners carry freight, but Category:Cargo aircraft is for dedicated freighters. On the other hand, when an aircraft is designed from the start with dual or multiple roles in mind, it should be classified into both of those trees. A common example are so-called "tactical" or "strike" fighters that equally belong in Category:Fighter aircraft and Category:Bomber aircraft.

Category:Military aircraft

Existing subcategories are:

Probably the haziest distinction here is what constitutes an "attack aircraft" - most fighters (and even some trainers) have some ground-attack capability, and the distinction between an attack aircraft and a "light bomber" may not be clear either. Try to be guided by how the air force that used the aircraft classified it.

Civil aircraft

Abandoned civil aircraft projects

Civil aircraft by type

Argentine civil aircraft

Australian civil aircraft

Austrian and Austro-Hungarian civil aircraft

Austrian civil aircraft

Belgian civil aircraft

Brazilian civil aircraft

British civil aircraft

Bulgarian civil aircraft

Canadian civil aircraft

Chilean civil aircraft

Chinese civil aircraft

Colombian civil aircraft

Cypriot civil aircraft

Czech and Czechoslovak civil aircraft

Danish civil aircraft

Dutch civil aircraft

Emirati civil aircraft

Estonian civil aircraft

Finnish civil aircraft

French civil aircraft

German civil aircraft

Greek civil aircraft

Hungarian civil aircraft

Indian civil aircraft

Indonesian civil aircraft

International civil aircraft

Iranian civil aircraft

Israeli civil aircraft

Italian civil aircraft

Japanese civil aircraft

Latvian civil aircraft

Lithuanian civil aircraft

Malaysian civil aircraft

Mexican civil aircraft

New Zealand civil aircraft

Norwegian civil aircraft

Peruvian civil aircraft

Polish civil aircraft

Portuguese civil aircraft

Republic of China civil aircraft

Romanian civil aircraft

Russian civil aircraft

Slovak civil aircraft

Slovenian civil aircraft

South African civil aircraft

South Korean civil aircraft

Soviet and Russian civil aircraft

Spanish civil aircraft

Swedish civil aircraft

Swiss civil aircraft

Taiwanese civil aircraft

Turkish civil aircraft

Ukrainian civil aircraft

United States civil aircraft

Yugoslav and Serbian civil aircraft

Yugoslav civil aircraft

Existing subcategories are:

Category:Agricultural aircraft
Category:Airliners
Category:Business aircraft (Was Category:Business jets)
Category:Cargo aircraft
Category:Civil utility aircraft
Category:Mailplanes
Category:Sailplanes
Category:Ultralight aircraft

Category:Experimental aircraft

This category should be reserved for pure research aircraft (not prototypes). Distinction is not made here between civil and military projects.

Category:Special-purpose aircraft

These aircraft have been designed for a single purpose - usually at the expense of any other capability they may have otherwise had. Most are specialised variants of existing aircraft types.

Era

Aircraft are classified into the decade that their first flight occurred in. Usually, this will be the first flight of the prototype, but for an article about a specific variant, the category should reflect the date that this variant first flew, which may be in a different decade.

While it may seem attractive to add multiple eras to reflect the entire service life of an aircraft, consider that this is generally much harder to pin-point and is subject to much qualification. Date of first flight is a single, unambiguous point in time.

Aircraft projects that were cancelled without ever flying are categorised by the year the project was terminated or abandoned (ie, the closest that they got to a first flight.)

Secondary categorisation

Additionally, many aircraft have been given categories according to various distinguishing features. This is a more ad-hoc set of categories, which currently include:

Aircraft by manufacturer

Aircraft by power sources

Aircraft by wing type

Other

Many more are certainly possible.

These exist side-by-side with the primary categories described above.