# வார்ப்புரு:Aircraft specs/doc

## Syntax

This template was designed so that the data supported by it should be largely self-explanatory. A detailed description of the various fields, with examples, follows:  
- **<code>|ref=</code>** allows for the data in this section to be specifically sourced.  
- **<code>|prime units?=</code>** switches the template from displaying SI (metric) units first (by entering **met**) or English (Imperial) units first (by entering **imp** for mph first or **kts** for kts or nautical miles first). There is a long-standing convention within WikiProject:Aircraft that specifications for US, Canadian and UK aircraft (for the UK periods differ - eg RAF aircraft until post war used mph, FAA aircraft operated in knots) should be given as English units first, and all others as SI units first.
: you *must* include **imp**, **kts**, or **met** in this field or the template won't display at all!  
- **<code>|genhide=</code>** allows the "General characteristics" heading to be manually turned off in the rare case that of the data in this section is available. Enter <code>|genhide=Y</code> to do this. If using this parameter, please leave a hidden note so that other editors will know to remove this line to turn the heading back on again.
::Example
:::  
- **<code>|crew=</code>** the number of people typically required to operate the aircraft, and their positions (if known). For commercial aircraft, this may include cabin crew. If specific positions are not known, this field might just contain a number. If the number is "One", however, it's safe to assume that this person's job might be "pilot"! Drones and UAVs should have "None" in this field.  
::Examples
:::Four
:::One pilot
:::None
:::Three: Pilot, co-pilot, and navigator/radio operator
:::Two: Pilot and tail-gunner
:::Five: Two pilots, flight engineer, two cabin crew  
- **<code>|capacity=</code>** – the passenger and/or cargo carrying capacity of the aircraft. Typically, this may include some alternatives when a transport aircraft is typically configurable for a variety of cargo types. In these cases, the alternatives should be separated by *or* (in italics)  
:: Examples
::: 32 passengers
::: 2,000 kg (4,400 lb) of cargo
::: 320 US gal (1,200 L) of chemicals
::: Eight 463L cargo pallets
::: Six passengers *or* two litters with attendants  
- **<code>|length=</code>** – the overall length of the airframe. For rotary-wing aircraft, this is the fuselage length, not counting areas swept by turning rotors.  
- **<code>|span=</code>** – the overall wingspan for fixed-wing aircraft. This does not count areas swept by turning propellers, but does include the width of tip-tanks, finlets, and non-removable wingtip weapons stations.  
- For bi- and tri-planes, a separate measurement for each wing can be entered. For bi-planes use "upper" and "lower", for tri-planes use "upper" "mid" and "lower". If the spans are equal, use the previous parameter <code>|span=</code>.
**<code>|upper span m=</code>**
**<code>|upper span ft=</code>**
**<code>|upper span in=</code>**
**<code>|mid span m=</code>**
**<code>|mid span ft=</code>**
**<code>|mid span in=</code>**
**<code>|lower span m=</code>**
**<code>|lower span ft=</code>**
**<code>|lower span in=</code>**  
- **<code>|swept =</code>** – the swept wingspan variable-geometry fixed-wing aircraft  
- **<code>|dia=</code>** – the diameter of an aircraft where this is the best way to describe it. This will most often be used for describing airships and balloons, but will also make sense for disc-shaped (Example: VZ-1 Pawnee, Avro Avrocar) or cylindrical (Example: SNECMA Coléoptère) heavier-than-air aircraft. Please do not use this to express a fuselage diameter of a conventional heavier-than-air aircraft – mention that in the article text if it's relevant.  
- **<code>|width=</code>** – the width of an aircraft in the few very rare cases where this is the best way to describe it (example: Rolls-Royce Thrust Measuring Rig, LLRV)  
- **<code>|height=</code>** – the overall height of an aircraft, landing gear extended  
- **<code>|wing area=</code>** – the area of the mainplanes of a fixed-wing aircraft. This excludes the area of horizontal stabiliser or canards. For biplanes, triplanes, and multiplanes, this is the sum of all mainplane areas. For variable-geometry aircraft, this is the unswept area  
- **<code>|swept area=</code>** – for variable-geometry aircraft where the mainplane area differs depending on whether the wings are swept or not.  
- **<code>|volume=</code>** – the envelope volume of a lighter-than-air or hybrid aircraft. Please do not use this to express the volume of a cargo space – put that under "capacity" if it's relevant.  
- **<code>|aspect ratio=</code>** – the ratio of the length of a wing to its chord. While measurable in any fixed-wing aircraft, please only provide this specification when describing sailplanes or for aircraft where this is an important parameter. This can also be used for *root*, *tip*, and *mid* point information.  
- **<code>|airfoil=</code>** - For fixed wing aircraft, the type of airfoil the wing uses. Eg, see NACA airfoil for information on airfoil types.  
- **<code>|empty weight=</code>** - the unloaded, unfuelled, unoccupied weight of the aircraft. In most cases, this will be the Basic Aircraft Empty Weight. For lighter-than-air or hybrid aircraft, this will be the structural weight of the aircraft.  
- **<code>|gross weight=</code>** - the fully-loaded weight of the aircraft. In most cases, this will be the Maximum Take Off Weight.  
- **<code>|max takeoff weight=</code>** - the max takeoff weight of the aircraft, when different from the above gross weight.  
- **<code>|fuel capacity=</code>** - description of fuel capacity.  
- **<code>|lift=</code>** - the static lift of a lighter-than-air or hybrid aircraft. Please do not use this to describe dynamic lift.  
- **<code>|more general=</code>** - A place to put anything relevant not included already under the general parameters eg "Fuel Capacity: 500 gallons"