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Boulton Paul P.92

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Boulton Paul P.92

Boulton Paul P.92
Boulton Paul P.92/2 (V3142)
Role fighter
National origin United Kingdom
Manufacturer Boulton Paul
Status Cancelled
Number built 1 P.92/2

The Boulton Paul P.92 was a British design by Boulton Paul for a two-seat turret-armed fighter/ground attack aircraft to meet Air Ministry Specification F.11/37. Only a half scale prototype - the P.92/2 - was built and tested as check on aerodynamics before the project was cancelled in 1940.

Contents

  • Development 1
  • Specifications (P.92/2) 2
  • See also 3
  • References 4
  • External links 5

Development

Specification F.11/37 - issued in May 1937 - called for a home defence fighter capable of day and night operations,[1] that could operate in the ground support role. Armament was to be four 20 mm (.79 in) cannons (i.e. superior to eight machine gun designs then under development) in a power operated turret and a single 250 lb (113 kg) bomb in an internal bomb bay. The turret was also expected to be aerodynamically faired to meet the wing so as not to unduly affect performance. The aircraft was expected to be able to have a speed of 370 mph (595 km/h) at 15,000 ft (4,572 m), with a service ceiling of 35,000 ft (10,668 m) and manage an endurance of two and a half hours.

There were submissions for the specification from Armstrong Whitworth, Boulton Paul, Bristol, Gloster (a design similar to their Gloster F.9/37), and Hawker.[2]

Boulton Paul was awarded a contract for two prototypes of their design, the first using Rolls Royce Vulture and the second employing the Napier Sabre - both big high power engines (1,800 hp/1,342 kW and 2,000 hp/1,491 kW respectively). In November 1938, a third example was ordered, which was to be powered by the Sabre, while the first two would be powered by the Vulture. The wing span of the P.92 was to have been 62 ft 5 in (19 m).[3] The Boulton Paul design minmised drag by mounting the four cannons in a 13-foot wide shallow domed turret built into a thickened centre wing section. At elevations below 30 degrees the cannon were in recesses in the turret.

The design and prototype production was slowed; initially the drawing office was concentrating on the Defiant turret fighter and the aerodynamics of the turret housing were difficult. It was expected the first prototype would fly in March 1940[4]

Following wind tunnel tests on a 2/7 scale model at Royal Aircraft Establishment at Farnborough, and since Boulton Paul a contract was given to Heston Aircraft Company in May 1939 to build a half-scale piloted flying model aircraft named the P.92/2, with serial V3142. The contract for the prototypes was cancelled in May 1940[3] due to the need to standardize aircraft production in the face of the German advance through Europe. Production of the P.92/2 was to continue.[4]

The P.92/2 - known also as Heston JA.8 - was fitted with Gipsy Major engines, and was completed in early 1941. The first flight, at Heston Aerodrome, was made by Boulton Paul's chief test pilot Flight Lieutenant Cecil Feather.

The P.92/2 was subsequently flown to Boulton Paul's airfield at Wolverhampton, and in June 1943 it went to the Aeroplane and Armament Experimental Establishment at Boscombe Down for flight testing and assessments. Although F.11/37 was suspended, a four-cannon turret was relevant to the B.1/39 heavy bomber specification.[5] V3142 was later used by Boulton Paul as a 'runabout'.[3]

Specifications (P.92/2)

Data from Boulton Paul Aircraft since 1915[6]

General characteristics
  • Crew: 1
  • Length: 27 ft 6 in (8.38 m)
  • Wingspan: 33 ft (10 m)
  • Height: 7.6 ft (2.3 m)
  • Gross weight: 2,778 lb (1,260 kg)
  • Powerplant: 2 × de Havilland Gipsy Major II 4-cylinder inverted in-line air-cooled piston engine, 130 hp (97 kW) each

Performance

  • Maximum speed: 152 mph (245 km/h; 132 kn) at sea level
  • Cruising speed: 84 mph; 73 kn (135 km/h)

See also

Aircraft of comparable role, configuration and era
Related lists

References

Notes

-- Module:Hatnote -- -- -- -- This module produces hatnote links and links to related articles. It -- -- implements the and meta-templates and includes -- -- helper functions for other Lua hatnote modules. --


local libraryUtil = require('libraryUtil') local checkType = libraryUtil.checkType local mArguments -- lazily initialise Module:Arguments local yesno -- lazily initialise Module:Yesno

local p = {}


-- Helper functions


local function getArgs(frame) -- Fetches the arguments from the parent frame. Whitespace is trimmed and -- blanks are removed. mArguments = require('Module:Arguments') return mArguments.getArgs(frame, {parentOnly = true}) end

local function removeInitialColon(s) -- Removes the initial colon from a string, if present. return s:match('^:?(.*)') end

function p.findNamespaceId(link, removeColon) -- Finds the namespace id (namespace number) of a link or a pagename. This -- function will not work if the link is enclosed in double brackets. Colons -- are trimmed from the start of the link by default. To skip colon -- trimming, set the removeColon parameter to true. checkType('findNamespaceId', 1, link, 'string') checkType('findNamespaceId', 2, removeColon, 'boolean', true) if removeColon ~= false then link = removeInitialColon(link) end local namespace = link:match('^(.-):') if namespace then local nsTable = mw.site.namespaces[namespace] if nsTable then return nsTable.id end end return 0 end

function p.formatPages(...) -- Formats a list of pages using formatLink and returns it as an array. Nil -- values are not allowed. local pages = {...} local ret = {} for i, page in ipairs(pages) do ret[i] = p._formatLink(page) end return ret end

function p.formatPageTables(...) -- Takes a list of page/display tables and returns it as a list of -- formatted links. Nil values are not allowed. local pages = {...} local links = {} for i, t in ipairs(pages) do checkType('formatPageTables', i, t, 'table') local link = t[1] local display = t[2] links[i] = p._formatLink(link, display) end return links end

function p.makeWikitextError(msg, helpLink, addTrackingCategory) -- Formats an error message to be returned to wikitext. If -- addTrackingCategory is not false after being returned from -- Module:Yesno, and if we are not on a talk page, a tracking category -- is added. checkType('makeWikitextError', 1, msg, 'string') checkType('makeWikitextError', 2, helpLink, 'string', true) yesno = require('Module:Yesno') local title = mw.title.getCurrentTitle() -- Make the help link text. local helpText if helpLink then helpText = ' (help)' else helpText = end -- Make the category text. local category if not title.isTalkPage and yesno(addTrackingCategory) ~= false then category = 'Hatnote templates with errors' category = string.format( '%s:%s', mw.site.namespaces[14].name, category ) else category = end return string.format( '%s', msg, helpText, category ) end


-- Format link -- -- Makes a wikilink from the given link and display values. Links are escaped -- with colons if necessary, and links to sections are detected and displayed -- with " § " as a separator rather than the standard MediaWiki "#". Used in -- the template.


function p.formatLink(frame) local args = getArgs(frame) local link = args[1] local display = args[2] if not link then return p.makeWikitextError( 'no link specified', 'Template:Format hatnote link#Errors', args.category ) end return p._formatLink(link, display) end

function p._formatLink(link, display) -- Find whether we need to use the colon trick or not. We need to use the -- colon trick for categories and files, as otherwise category links -- categorise the page and file links display the file. checkType('_formatLink', 1, link, 'string') checkType('_formatLink', 2, display, 'string', true) link = removeInitialColon(link) local namespace = p.findNamespaceId(link, false) local colon if namespace == 6 or namespace == 14 then colon = ':' else colon = end -- Find whether a faux display value has been added with the | magic -- word. if not display then local prePipe, postPipe = link:match('^(.-)|(.*)$') link = prePipe or link display = postPipe end -- Find the display value. if not display then local page, section = link:match('^(.-)#(.*)$') if page then display = page .. ' § ' .. section end end -- Assemble the link. if display then return string.format('%s', colon, link, display) else return string.format('%s%s', colon, link) end end


-- Hatnote -- -- Produces standard hatnote text. Implements the template.


function p.hatnote(frame) local args = getArgs(frame) local s = args[1] local options = {} if not s then return p.makeWikitextError( 'no text specified', 'Template:Hatnote#Errors', args.category ) end options.extraclasses = args.extraclasses options.selfref = args.selfref return p._hatnote(s, options) end

function p._hatnote(s, options) checkType('_hatnote', 1, s, 'string') checkType('_hatnote', 2, options, 'table', true) local classes = {'hatnote'} local extraclasses = options.extraclasses local selfref = options.selfref if type(extraclasses) == 'string' then classes[#classes + 1] = extraclasses end if selfref then classes[#classes + 1] = 'selfref' end return string.format( '
%s
', table.concat(classes, ' '), s )

end

return p-------------------------------------------------------------------------------- -- Module:Hatnote -- -- -- -- This module produces hatnote links and links to related articles. It -- -- implements the and meta-templates and includes -- -- helper functions for other Lua hatnote modules. --


local libraryUtil = require('libraryUtil') local checkType = libraryUtil.checkType local mArguments -- lazily initialise Module:Arguments local yesno -- lazily initialise Module:Yesno

local p = {}


-- Helper functions


local function getArgs(frame) -- Fetches the arguments from the parent frame. Whitespace is trimmed and -- blanks are removed. mArguments = require('Module:Arguments') return mArguments.getArgs(frame, {parentOnly = true}) end

local function removeInitialColon(s) -- Removes the initial colon from a string, if present. return s:match('^:?(.*)') end

function p.findNamespaceId(link, removeColon) -- Finds the namespace id (namespace number) of a link or a pagename. This -- function will not work if the link is enclosed in double brackets. Colons -- are trimmed from the start of the link by default. To skip colon -- trimming, set the removeColon parameter to true. checkType('findNamespaceId', 1, link, 'string') checkType('findNamespaceId', 2, removeColon, 'boolean', true) if removeColon ~= false then link = removeInitialColon(link) end local namespace = link:match('^(.-):') if namespace then local nsTable = mw.site.namespaces[namespace] if nsTable then return nsTable.id end end return 0 end

function p.formatPages(...) -- Formats a list of pages using formatLink and returns it as an array. Nil -- values are not allowed. local pages = {...} local ret = {} for i, page in ipairs(pages) do ret[i] = p._formatLink(page) end return ret end

function p.formatPageTables(...) -- Takes a list of page/display tables and returns it as a list of -- formatted links. Nil values are not allowed. local pages = {...} local links = {} for i, t in ipairs(pages) do checkType('formatPageTables', i, t, 'table') local link = t[1] local display = t[2] links[i] = p._formatLink(link, display) end return links end

function p.makeWikitextError(msg, helpLink, addTrackingCategory) -- Formats an error message to be returned to wikitext. If -- addTrackingCategory is not false after being returned from -- Module:Yesno, and if we are not on a talk page, a tracking category -- is added. checkType('makeWikitextError', 1, msg, 'string') checkType('makeWikitextError', 2, helpLink, 'string', true) yesno = require('Module:Yesno') local title = mw.title.getCurrentTitle() -- Make the help link text. local helpText if helpLink then helpText = ' (help)' else helpText = end -- Make the category text. local category if not title.isTalkPage and yesno(addTrackingCategory) ~= false then category = 'Hatnote templates with errors' category = string.format( '%s:%s', mw.site.namespaces[14].name, category ) else category = end return string.format( '%s', msg, helpText, category ) end


-- Format link -- -- Makes a wikilink from the given link and display values. Links are escaped -- with colons if necessary, and links to sections are detected and displayed -- with " § " as a separator rather than the standard MediaWiki "#". Used in -- the template.


function p.formatLink(frame) local args = getArgs(frame) local link = args[1] local display = args[2] if not link then return p.makeWikitextError( 'no link specified', 'Template:Format hatnote link#Errors', args.category ) end return p._formatLink(link, display) end

function p._formatLink(link, display) -- Find whether we need to use the colon trick or not. We need to use the -- colon trick for categories and files, as otherwise category links -- categorise the page and file links display the file. checkType('_formatLink', 1, link, 'string') checkType('_formatLink', 2, display, 'string', true) link = removeInitialColon(link) local namespace = p.findNamespaceId(link, false) local colon if namespace == 6 or namespace == 14 then colon = ':' else colon = end -- Find whether a faux display value has been added with the | magic -- word. if not display then local prePipe, postPipe = link:match('^(.-)|(.*)$') link = prePipe or link display = postPipe end -- Find the display value. if not display then local page, section = link:match('^(.-)#(.*)$') if page then display = page .. ' § ' .. section end end -- Assemble the link. if display then return string.format('%s', colon, link, display) else return string.format('%s%s', colon, link) end end


-- Hatnote -- -- Produces standard hatnote text. Implements the template.


function p.hatnote(frame) local args = getArgs(frame) local s = args[1] local options = {} if not s then return p.makeWikitextError( 'no text specified', 'Template:Hatnote#Errors', args.category ) end options.extraclasses = args.extraclasses options.selfref = args.selfref return p._hatnote(s, options) end

function p._hatnote(s, options) checkType('_hatnote', 1, s, 'string') checkType('_hatnote', 2, options, 'table', true) local classes = {'hatnote'} local extraclasses = options.extraclasses local selfref = options.selfref if type(extraclasses) == 'string' then classes[#classes + 1] = extraclasses end if selfref then classes[#classes + 1] = 'selfref' end return string.format( '
%s
', table.concat(classes, ' '), s )

end

return p
  1. ^ Buttler p56
  2. ^ Buttler p57-58
  3. ^ a b c
  4. ^ a b Buttler p58
  5. ^ Buttler p59
  6. ^
Bibliography
  • Buttler, Tony. British Secret Projects: Fighters & Bombers 1935-1950. Hinckley, UK: Midland Publishing, 2004. ISBN 1-85780-179-2.

External links

  • British Aircraft of World War II
  • Unusual British aircraft
  • British Aircraft Directory
  • A photograph of the half-scale P.92/2
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