(Bristol) 149 Bolingbroke @·AIRCRAFTUBE

  • Bristol 149 Bolingbroke Mk.4T
Bristol 149 Bolingbroke Mk.4T
    Bristol 149 Bolingbroke Mk.4T
  • Bristol Bolingbroke
Bristol Bolingbroke
    Bristol Bolingbroke
  • Bristol 149 Bolingbroke Mk.4T
Bristol 149 Bolingbroke Mk.4T
    Bristol 149 Bolingbroke Mk.4T
  • Bristol Bolingbroke Mk.III
Bristol Bolingbroke Mk.III
    Bristol Bolingbroke Mk.III
  • Bristol 149 Bolingbroke Mk.4T
Bristol 149 Bolingbroke Mk.4T
    Bristol 149 Bolingbroke Mk.4T
  • Bristol 149 Bolingbroke Mk.4T
Bristol 149 Bolingbroke Mk.4T
    Bristol 149 Bolingbroke Mk.4T
  • Bristol Bolingbroke
Bristol Bolingbroke
    Bristol Bolingbroke
  • Bolingbroke IVT - Commonwealth Air Training Plan Museum - Brandon - Manitoba
Bolingbroke IVT - Commonwealth Air Training Plan Museum - Brandon - Manitoba
    Bolingbroke IVT - Commonwealth Air Training Plan Museum - Brandon - Manitoba
  • Bristol Bolingbroke Bristol Bolingbroke
    Bristol Bolingbroke

Bristol Bolingbroke

Design and development

In 1935, the British Air Ministry issued Specification G.24/35 to procure a coastal reconnaissance/light bomber to replace the Avro Anson. Bristol proposed the Type 149, based on its Blenheim Mk I, with Bristol Aquila engines to give greater range. While the Air Ministry rejected this proposal, a Blenheim Mk I, retaining its Mercury VIII engines, was converted as a Type 149 (Blenheim Mk III) for the general reconnaissance role. The nose was lengthened to provide more room for the bombardier, with the upper left surface of the nose being scooped out to maintain pilot visibility during takeoff and landing.

The longer range also fulfilled a Canadian requirement for a maritime patrol aircraft. Consequently, Fairchild Aircraft Ltd. (Canada) of Quebec started production of the Blenheim Mk IV as the Bolingbroke (the originally intended name for the Blenheim IV). This type was nicknamed the "Bolly". After a small run of aircraft constructed to British specifications, as the Bolingbroke Mk I, Fairchild switched production to the Bolingbroke Mk IV with Canadian and American instruments and equipment. These versions also included anti-icing boots and a dinghy. One of the early Mk IV variants was the Bolingbroke Mk IVW which was powered by two 825 hp (615 kW) Pratt & Whitney SB4G Twin Wasp Junior engines. Incapable of maintaining altitude on one engine, the normal bomb load was reduced to 500 pounds on these aircraft to compensate for the low engine power. The most-produced variant was the Bolingbroke Mk IVT trainer, of which 457 were completed. A total of 626 Bolingbrokes were produced.

Operational history

Most of the 151 Mk IVs built served in their intended role as patrol bombers on the Atlantic and Pacific coasts of Canada between 1940 and 1944. Two squadrons of these aircraft also served in Alaska during the Aleutians campaign. The Mk IVT trainers saw extensive use in the British Commonwealth Air Training Plan (BCATP).

Variants

  • Bolingbroke Mk I : Twin-engine maritime patrol bomber aircraft, powered by two Bristol Mercury VIII radial piston engines, with British equipment. 18 built.
  • Bolingbroke Mk II : Conversion of fifth Mk I with US equipment - prototype of Mk IV.
  • Bolingbroke Mk III : Floatplane conversion of sixteenth Bolingbroke Mk I, with two Edo floats.
  • Bolingbroke Mk IV : Twin-engine maritime patrol bomber aircraft, equipped with anti-icing boots and a dinghy, also fitted with American and Canadian instruments and equipment, powered by two Bristol Mercury XV radial piston engines, 134 built.
  • Bolingbroke Mk IVW : Sub-version of Mk IV powered by two 825 hp (615 kW) Pratt & Whitney SB4G Twin Wasp Junior radial piston engines as contingency against possible shortages of Mercury engines. The Mk IVW's performance was below that of the Mk IV and the supply of the British engines was maintained so production returned to the Mk IV after only 15 aircraft were built.
  • Bolingbroke Mk IVC : Version of Mk IV with 900 hp (671 kW) Wright R-1820 Cyclone engines not requiring high octane fuel. One built.
  • Bolingbroke Mk IVT : Multi-purpose trainer aircraft. A total of 350 built powered by Mercury XV engines, followed by a further 107 powered by the low-octane fuel Mercury XX* engine, giving a total of 457 built, with a further 51 cancelled. 6 Mk IVT were converted to dual controls. A further 89 were converted to Mk IVTT Target Tug with the addition of winching gear in the rear cabin and target drogue storage in the bomb bay.

Operators

  • Royal Canadian Air Force : Operational Squadrons of the Home War Establishment (HWE)
  • British Commonwealth Air Training Plan (BCATP)

Survivors

  • IV Canadian Warplane Heritage Museum, Hamilton, Ontario. This is being rebuilt to airworthy status from the remains of eight separate aircraft.
  • IV 9048 Bristol Aero Collection, Filton, Bristol, under restoration.
  • IV 9059 Commonwealth Air Training Plan Museum in Brandon, Manitoba.
  • IV 9104 British Columbia Aviation Museum, Victoria, British Columbia.
  • IVT 9892 Canada Aviation and Space Museum, Rockcliffe, Ontario.
  • IVT 9895 Royal Museum of the Armed Forces and of Military History, Brussels, Belgium.
  • IVT 9940 National Museum of Flight, Scotland, under restoration.
  • IVT 9944 Commonwealth Air Training Plan Museum in Brandon, Manitoba. This aircraft is displayed next to the Trans-Canada Highway in Brandon.
  • IVT 9987 Bomber Command Museum of Canada, Nanton, Alberta.
  • IVT 10001 Royal Air Force Museum, London.
  • IVT 10076 Pima Air & Space Museum, Tucson, Arizona.
  • IVT 10120 Reynolds-Alberta Museum, Wetaskiwin, Alberta.
  • IVT 10201 This was restored to airworthy condition by the Aircraft Restoration Company at Imperial War Museum Duxford as G-BPIV. It is currently being fitted with a Blenheim Mk I nose which had previously been converted to a car.

— — — = = — — —

This text is available under the Creative Commons Attribution-ShareAlike License
Source : Article Bristol Bolingbroke of Wikipedia ( authors )

Specifications (Bolingbroke Mk IV)

  • Crew: 3.
  • Length: 42 ft 9 in (13.03 m).
  • Height: 9 ft 10 in (3.00 m).
  • Wingspan: 56 ft 4 in (17.17 m).
  • Wing area: 469 ft² (43.6 m²).
  • Wing loading: 29.3 lb/ft² (143 kg/m²).
  • Empty weight: 9,835 lb (4,470 kg).
  • Loaded weight: 13,750 lb (6,250 kg).
  • Max. takeoff weight: 14,500 lb (6,591 kg).
  • Maximum speed: 250 knots (288 mph, 464 km/h) at 15,000 ft (4,570 m).
  • Cruise speed: 174 knots (200 mph, 322 km/h).
  • Range: 1,617 nm (1,860 mi, 2,995 km)at 170 mph (274 km/h).
  • Service ceiling: 27,000 ft (8,230 m).
  • Rate of climb: 1,480 ft/min (7.5 m/s).
  • Powerplant: Two Bristol Mercury XV nine-cylinder air-cooled radial engines.
  • Power: 920 hp (685 kW) at 9,250 ft (2,820 m) each.
  • Power/mass: 0.14 hp/lb (0.24 kW/kg).
  • Armament: One fixed forward firing .303 in Browning machine gun and one .303 in Browning machine gun in power operated dorsal turret, alternately in the IVT, two Browning machine guns in a Boulton Paul Type C turret. Two 500 lb (230 kg) or four 250 lb (114 kg) bombs.

— — — = = — — —

This text is available under the Creative Commons Attribution-ShareAlike License
Source : Article Bristol Bolingbroke of Wikipedia ( authors )
Bristol 149 Bolingbroke : Your comments on this subject
Powered by Disqus
Top
Legal Credits FAQ Help Site Map

Terms of use for the services available on this site

By using this Website, Users agree to the following terms of use and rules :

Definitions

  • Webmaster : Head Administrator with all authority over the management and development of the Website.
  • Administrator : Anyone that was given by the Webmaster full or partial access to the Website's structure or with moderation rights on messages posted by Users.
  • User or Visitor : Any person visiting the Website pages.
  • Website : The following provisions apply to a single Website accessible via the www.aircraftube.com, www.aircraftube.org, www.aircraftube.net and www.all-aircraft.com. URL's
  • Service : All free informations and tools contained on the Website.
  • Comments : All text written by users on Blogs and comment pages available on the Website.
  • Media : All media available on or through the Website. One must distinguish the local media (photos, curves, drawings) and the external media (videos) which the Website refers.
  • Purpose of this site

    The purpose of this non-commercial site is purely educational. Reflecting a passion, it is also there to preserve the memory of all those who gave their lives, their health or energy in the name of freedom, aviation safety or simply our passenger comfort.

    Copyright

    Some media may have escaped the vigilance of Administrators with regard to copyrights. If a user reports copyright infringement, he will be asked to prove that he is indeed the rights's owner for the concerned media. If so, his decision on the Administrator's next action will be respected: A total suppression of the Media on the Website, or the addition of some owner's reference. The publication of a media on the internet normally having as a goal to make it visible to many people, the Administrators expect in any case that the second option will be most often chosen.

    Pursuant to the Law on copyright and related rights, the user has the right to download and reproduce information on the Website for personal use and provided that the source is mentionned. They cannot however be used for commercial or advertising purposes.

    Using Blogs and filing comments

  • Moderator : The Administrator reserves the right to prevent the publication of comments that are not directly related to the Service without providing any explanation. Similarly, all insults, out of scope or unethical material will be banned.
  • Identification : Persons wishing to post a comment or use any form of contact are required to provide identification by the means of a valid e-mail address.
  • Responsibilities : Comments are posted on the Website under the unique responsability of their authors and the Administrators may in no case be liable for any statements or claims that the users might have issued.
  • As the comment system is hosted and maintained on servers external to the Website, the Administrators may in no circumstances be held responsible for the use that administrators of these servers or other third parties may have with those comments or filed data.

    Content Liability

    The Administrators carefully check the reliability of the sources used. They cannot, however, guarantee the accuracy of any information contained on the Website, partly because of the multiple sources from which they come.

    JavaScript and cookies - Storing information

    This Website imperatively uses JavaScript and cookies to function properly. Neither of these technologies, or other means shall in no case be used on the Website for the retention or disclosure of personal information about Visitors. Exceptions to this rule will involve storing the Users banned for inappropriate comments they might have given as well as contact information for Users wishing to subscribe to future newsletters.

    When a user accesses the Website, the corresponding servers may automatically collect certain data, such as IP address, date and time of Website access, viewed pages and the type of browser used. This information is kept only for the purpose of measuring the number of visitors to the different sections of the site and make improvements.

    Donations - Advertising

    To continue providing the Service for free, the Webmaster reserves the right to insert advertising or promotional messages on any page of the Site. In the same idea, any donations will only by used to cover the running costs of the site, such as hosting, connection fees, hardware and software necessary for the development and maintenance of the Website.

    Links and other websites

    Administrators shall in no case be liable for the non-availability of websites operated by third parties to which users would access through the Website.

    Administrators assume no liability for any content, advertising, products and/or services available on such third party websites. It is reminded that those sites are governed by their own terms of use.

    Placing a link to third party sites or authorize a third party to include a link on their website refering to this Website does not mean that the Administrators recommend in any way the products or services offered by these websites.

    Modifications

    The Webmaster reserves the right to modify at any time without notification the present terms of use as well as all content or specific functionality that the Website offers.

    The modified terms and conditions immediately apply to the using Visitor when changes come online. Visitors are invited to consult the site regularly on the most current version of the terms and conditions

    Governing Law and Jurisdiction

    These general conditions are governed by Belgian law.

    In case of dispute regarding the interpretation and/or execution of the above terms, the parties agree that the courts of the district of Nivelles, Belgium shall have exclusive jurisdiction power.

    Credits page

    Wikipedia.org

    Wikipedia is a collaboratively edited, multilingual, free Internet encyclopedia.

    Youtube

    YouTube is a video-sharing website on which users can upload, view and share videos.

    Special thanks to all Youtube quality aviation vids providers, specially (Those I forgot, please excuse me or report) :

    Airboyd
    Andys Video
    Aviation videos archives
    Bomberguy
    Classic Aviation TV
    Historical Aviation Film Unit
    Horsemoney
    Jaglavaksoldier
    Joluqa Malta
    Just Planes
    Koksy
    Classic Airliners & Vintage Pop Culture
    Memorial Flight
    Octane130
    Okrajoe
    SDASM archives
    Spottydog4477
    The Aviators TV
    Valentin Izagirre Bengoetxea
    Vexed123
    VonBerlich
    Zenos Warbirds

    Bundesarchiv

    The German Federal Archives or Bundesarchiv are the National Archives of Germany.

    FAQ

    I don't see my comments any more!

    Please note that each page has it's own comment entry. So, if you enter a comment i.e. on the B-747, you will only see it on that related page.

    General comments are accessed via the "BLOG En" button.

    Comments are moderated, so please allow some delay before they appear, specially if you are outside Europe.

    Menus are developing below the page, because they are too long!

    But they remain accessible, for example by scrolling the mouse wheel, or with your finger (on the menu) on a smartphone or tablet.

    I see adds on all videos.

    Use a good free add remover software.

    The site is loading random pages at startup.

    We think it is a good way to bring back the memory of aircraft, persons or events sometimes quite forgotten.

    HELP PAGE

    Why this site?

    Discovery

    This website is dedicated to one's aeronautical passion (which I hope we share) and was realised mainly as an educationnal tool. Knowing that, you'll notice that each new visit brings random topics for the purpose of making new discoveries, some achievements or characters certainly not deserving the oblivion into which they have sometimes fallen.

    By these pages, we also want to pay tribute to all those who gave at one time or another, their lives or health in the name of freedom, aeronautical security or simply our comfort.

    Centralisation

    Internet is full of websites dedicated to aviation, but most are dedicated to subjects or periods that are very limited in space or time. The purpose of this site is to be as general as possible and thus treats all events as well as characters of all stripes and times while putting much emphasis on the most significant achievements.

    The same years saw birth of technologies like photography and cinema, thus permitting illustration of a large part of important aeronautical events from the start. Countless (and sometimes rare) media recently put online by enthousiasts finally give us access to these treasures, but the huge amount of information often makes things a little messy. A centralization effort is obviously most needed at this level.

    All persons who directly or indirectly contributed to the achievement or posting of such documents are here gratefully acknowledged.

    General

    Fluid website

    This site automatically fits the dimensions of your screen, whether you are on a desktop computer, a tablet or a smartphone.

    Bilingual website

    You can change the language by clicking on the flag in the upper left or via "Options" in the central menu. Of course, the videos remain in the language in which they were posted ...

    Browser compatibility

    The site is not optimized, or even designed to run on older browsers or those deliberately deviating from standards. You will most probably encounter display issues with Internet Explorer. In this case, it is strongly recommended installing a modern (and free!) browser that's respecting the standards, like Firefox, Opera, Chrome or Safari.

    Cookies and Javascript

    This site uses cookies and JavaScript to function properly. Please ensure that your browser is configured accordingly. Neither of these technologies, or other means shall in no case be used on the Site for the retention or disclosure of personal information about its Visitors. See the "Legal" page for more on this subject.

    Website layout

    Left menus

    Because of the lack of space on smartphones and small tablets, these menus are hidden. Everything is nevertheless accessible via the main menu option, located between the video and photo sections. This menu is placed there for compatibility reasons with some browsers, which play the videos over the menus.

    "Search" and "Latest" :
    The link "In Titles" restricts the search to the titles of different forms. Use this option if you are looking for a plane, a constructor, a pilot or a particular event that could have been treated as a subject.

    The link "In Stories" will bring you to a search in all texts (the "Story" tab) and will take more time. The search term will appear highlighted in green when opening the corresponding story.

    Would you believe, "Timeline" will show all subjects in chronological order.

    "Random" will reload the entire page with a new random topic.

    The bottom section keeps you abreast of the latest five entries. New topics are added regularly. Don't hesitate to come visit us often : add bookmark.

    Blogs and Comments central section

    Under the photos section comes the comments tabs window :

    You can enter general comments in your own language via one of the two buttons on the left (BLOG EN and BLOG FR). Note that these buttons are accessible regardless of the language to allow some participation in the other language.

    All comments are subject to moderation and will be published only if they comply with the basic rules of decorum, while remaining relevant to the purpose of this site.

    The third tab allows you to enter comments on the shown topic and is bilingual. Personal anecdotes, supplements and other information questions will take place here.

    The "Story" tab shows the explanatory texts. They are most often taken from Wikipedia, a site where we participate regularly.

    The "Data" tab is reserved for list of features and specifications.

    Right menus

    On a smartphone, the lack of space is growing and this menu is moved to the bottom of the page to give priority to videos and pictures.

    The top right icons are links to videos posted by third parties (on their own responsabilities) or by ourselves. The link below these icons will take you to the channel of the one who posted the video. Feel free to suggest other videos if you think they are of some interest (Use the BLOG button or the "Contact" link).