词条 | Flight deck |
释义 |
The flight deck of an aircraft carrier is the surface from which its aircraft take off and land, essentially a miniature airfield at sea. On smaller naval ships which do not have aviation as a primary mission, the landing area for helicopters and other VTOL aircraft is also referred to as the flight deck. The official U.S. Navy term for these vessels is "air-capable ships".[1] EvolutionEarly flight decksThe first flight decks were inclined wooden ramps built over the forecastle of warships. Eugene Ely made the first fixed-wing aircraft take-off from a warship from {{USS|Birmingham|CL-2|6}} on 14 November 1910. Two months later, on 18 January 1911, Ely landed his Curtiss pusher plane on a platform on {{USS|Pennsylvania|ACR-4|2}} anchored in San Francisco Bay using the first tailhook system, designed and built by circus performer and aviator Hugh Robinson. Ely told a reporter: "It was easy enough. I think the trick could be successfully turned nine times out of ten." On 9 May 1912,[2] Commander Charles Samson became the first man to take off from a ship which was underway when he flew his Short S.27 off of {{HMS|Hibernia|1905|6}}, which was steaming at {{convert|10.5|kn|mph km/h|abbr=on}}. Because the take-off speed of early aircraft was so low, it was possible for an aircraft to make a very short take off when the launching ship was steaming into the wind. Later, removable "flying-off platforms" appeared on the gun turrets of battleships and battlecruisers starting with {{HMS|Repulse|1916|6}}, allowing aircraft to be flown off for scouting purposes, although there was no chance of recovery. On 2 August 1917, while performing trials, Squadron Commander Edwin Harris Dunning landed a Sopwith Pup successfully on board the flying-off platform of {{HMS|Furious|47|6}}, becoming the first person to land an aircraft on a moving ship. However, on his third attempt, a tire burst as he attempted to land, causing the aircraft to go over the side, killing him; thus Dunning also has the dubious distinction of being the first person to die in an aircraft carrier landing accident. The landing arrangements on Furious were highly unsatisfactory. In order to land, aircraft had to maneuver around the superstructure. Furious was therefore returned to dockyard hands to have a {{convert|300|ft|m|abbr=on}} deck added aft for landing, on top of a new hangar. The central superstructure remained, however, and turbulence caused by it badly affected the landing deck. Full length decksThe first aircraft carrier that began to show the configuration of the modern vessel was the converted liner {{HMS|Argus|1917|6}}, which had a large flat wooden deck added over the entire length of the hull, giving a combined landing and take-off deck unobstructed by superstructure turbulence. Because of her unobstructed flight deck, Argus had no fixed conning tower and no funnel. Rather, exhaust gases were trunked down the side of the ship and ejected under the fantail of the flight deck (which, despite arrangements to disperse the gases, gave an unwelcome "lift" to aircraft immediately prior to landing). The lack of a command position and funnel was unsatisfactory, and Argus was used to experiment with various ideas to remedy the solution. A photograph in 1917 shows her with a canvas mock-up of a starboard "island" superstructure and funnel. This was placed on the starboard side because the rotary engines of some early aircraft created torque which pulled the nose left, meaning an aircraft naturally yawed to port on take-off; therefore, it was desirable that they turned away from the fixed superstructure. This became the typical aircraft carrier arrangement and was used in the next British carriers, {{HMS|Hermes|95|2}} and {{HMS|Eagle|1918|2}}. After World War I, battlecruisers that otherwise would have been discarded under the Washington Naval Treaty—such as the British {{HMS|Furious|47|6}} and {{sclass-|Courageous|aircraft carrier|4}} and the American {{USS|Lexington|CV-2|6}} and {{USS|Saratoga|CV-3|2}}—were converted to carriers along the above lines. Being large and fast they were perfectly suited to this role; the heavy armoring and scantlings and low speed of the converted battleship Eagle served to be something of a handicap in practice. Because the military effectiveness of aircraft carriers was then unknown, early ships were typically equipped with cruiser-calibre guns to aid in their defense if surprised by enemy warships. These guns were generally removed in World War II and replaced with anti-aircraft guns, as carrier doctrine developed the "task force" (later called "battle group") model, where the carrier's defense against surface ships would be a combination of escorting warships and its own aircraft. In ships of this configuration, the hangar deck was the strength deck and an integral part of the hull, and the hangar and light steel flight deck were considered to be part of the superstructure. Such ships were still being built into the late 1940s, classic examples being the U.S. Navy's {{sclass-|Essex|aircraft carrier|5}} and {{sclass-|Ticonderoga|aircraft carrier|0}} carriers. However, in 1936, the Royal Navy began construction of the {{sclass-|Illustrious|aircraft carrier|4}}. In these ships, the flight deck was the strength deck, an integral part of the hull, and was heavily armored to protect the ship and her air complement. The flight deck as the strength deck was adopted for later construction. This was necessitated by the ever-increasing size of the ships, from the 13,000 ton {{USS|Langley|CV-1|6}} in 1922 to over 100,000 tons in the latest {{sclass-|Nimitz|aircraft carrier|0}} and {{sclass-|Gerald R. Ford|aircraft carrier|0}} carriers. Armored decks{{Main|Armoured flight deck }}When aircraft carriers supplanted battleships as the primary fleet capital ship, there were two schools of thought on the question of armor protection being included into the flight deck. The United States Navy (USN) initially favored unarmored flight decks because they maximized aircraft carrier hangar and flight deck size, which in turn maximized aircraft capacity in the hangar, and on the flight deck, in the form of a permanent "deck park" for a large proportion of the aircraft carried.[3][4] In 1936 the Royal Navy developed the armored flight deck aircraft carrier which also enclosed the hangar sides and ends with armor. The addition of armor to the flight deck offered aircraft below some protection against aerial bombs while the armored hangar sides and ends helped to minimize damage and casualties from explosions or fires within or outside the hangar.[5] The addition of armor to the hangar forced a reduction in top-weight, so the hangar height was reduced, and this restricted the types of aircraft that these ships could carry, although the Royal Navy's armored carriers did carry spare aircraft in the hangar overheads.[6] The armor also reduced the length of the flight deck, reducing the maximum aircraft capacity of the armored flight deck aircraft carrier. Additionally, Royal Navy aircraft carriers did not use a permanent deck park until approximately 1943; before then the aircraft capacity of RN aircraft carriers was limited to their hangar capacity. The 23,000-ton British {{sclass-|Illustrious|aircraft carrier|4}} had a hangar capacity for 36 Swordfish-sized aircraft and a single {{convert|458|x|62|x|16|ft|m|adj=on}} hangar, but carried up to 57[7] aircraft with a permanent deck park, while the 23,400-ton {{sclass-|Implacable|aircraft carrier|4}} featured increased hangar capacity with a {{convert|458|x|62|x|14|ft|m|adj=on}} upper hangar and the addition of a {{convert|208|x|62|x|14|ft|m|adj=on}} lower hangar, forward of the after elevator, which had a total capacity of 52 Swordfish-sized aircraft or a mix of 48 late-war aircraft in the hangar plus 24 aircraft in a permanent deck park,[8] but carried up to 81 aircraft with a deck park.[9] The 27,500-ton USN {{sclass-|Essex|aircraft carrier|4}} had a {{convert|654|x|70|x|17.5|ft|m|adj=on}} hangar that was designed to handle a mix of 72 prewar USN aircraft.[10] but carried up to 104 late-war aircraft using both the hangar and a permanent deck park.[11][12] The experience of World War II caused the USN to change their design policy in favor of armored flight decks on much larger ships: "The main armor carried on {{USS|Enterprise|CVN-65|2}} is the heavy armored flight deck. This was to prove a significant factor in the catastrophic fire and explosions that occurred on Enterprise{{'}}s flight deck in 1969. The US Navy learned its lesson the hard way during World War II when all its carriers had only armored hangar decks. All attack carriers built since the {{sclass-|Midway|aircraft carrier|4}} have had armored flight decks."[13] Landing on flight decks{{See also|Arresting gear}}Landing arrangements were originally primitive, with aircraft simply being "caught" by a team of deck-hands who would run out from the wings of the flight deck and grab a part of the aircraft to slow it down. This dangerous procedure was only possible with early aircraft of low weight and landing speed. Arrangements of nets served to catch the aircraft should the latter fail, although this was likely to cause structural damage. Landing larger and faster aircraft on a flight deck was made possible through the use of arresting cables installed on the flight deck and a tailhook installed on the aircraft. Early carriers had a very large number of arrestor cables or "wires". Current U.S. Navy carriers have three or four steel cables stretched across the deck at {{convert|20|ft|m|abbr=on}} intervals which bring a plane, traveling at {{convert|150|mph|km/h|abbr=on}}, to a complete stop in about {{convert|320|ft|m|abbr=on}}. The cables are set to stop each aircraft at the same place on the deck, regardless of the size or weight of the plane. During World War II, large net barriers would be erected across the flight deck so aircraft could be parked on the forward part of the deck and recovered on the after part. This allowed increased complements but resulted in a lengthened launch and recovery cycle as aircraft were shuffled around the carrier to allow take-off or landing operations. A barricade is an emergency system used if a normal arrestment cannot be made. Barricade webbing engages the wings of the landing aircraft, and momentum is transferred to the arresting engine. Modern innovations{{Visible anchor|Angled flight deck}}The angled flight deck was invented by Royal Navy Captain (later Rear Admiral) Dennis Cambell, as an outgrowth of design study initially begun in the winter of 1944–1945. A committee of senior Royal Navy officers decided that the future of naval aviation was in jets, whose higher speeds required that the carriers be modified to "fit" their needs.[14][15][16] With this type of deck – also called a "skewed deck", "canted deck", "waist angle deck", or the "angle" – the aft part of the deck is widened and a separate runway is positioned at an angle from the centreline.[17] The angled flight deck was designed with the higher landing speeds of jet aircraft in mind, which would have required the entire length of a centreline flight deck to stop.[17] The design also allowed for concurrent launch and recovery operations, and allowed aircraft failing to connect with the arrestor cables to abort the landing, accelerate, and relaunch (bolter) without risk to other parked or launching aircraft.[17] The redesign allowed for several other design and operational modifications, including the mounting of a larger island (improving both ship-handling and flight control), drastically simplified aircraft recovery and deck movement (aircraft now launched from the bow and re-embarked on the angle, leaving a large open area amidships for arming and fueling), and damage control. Because of its utility in flight operations, the angled deck is now a defining feature of STOBAR and CATOBAR equipped aircraft carriers. The angled flight deck was first tested on {{HMS|Triumph|R16|6}} by painting angled deck markings onto the centerline of the flight deck for touch and go landings.[17] This was also tested on {{USS|Midway|CV-41|6}} the same year.[18][19] Despite the new markings, in both cases the arresting gear and barriers were still aligned with the centerline of the original deck. From September to December 1952, {{USS|Antietam|CV-36|6}} had a rudimentary sponson installed for true angled deck tests, allowing for full arrested landings, which proved during trials to be superior.[18] In 1953, Antietam trained with both U.S. and British naval units, proving the worth of the angled deck concept.[20] {{HMS|Centaur|R06|6}} was modified with overhanging angled flight deck in 1954.[17] The U.S. Navy installed the decks as part of the SCB-125 upgrade for the {{sclass-|Essex|aircraft carrier|4}} and SCB-110/110A for the {{sclass-|Midway|aircraft carrier|4}}. In February 1955, {{HMS|Ark Royal|R09|6}} became the first carrier to be constructed and launched with an angled deck, rather than having one retrofitted. This was followed in the same year by the lead ships of the British Majestic class ({{HMAS|Melbourne|R21|6}}) and the American {{sclass-|Forrestal|aircraft carrier|4}} ({{USS|Forrestal|CV-59|6}}).[17] {{Anchor|Ski-jump}}Ski-jump{{Main article|Ski-jump (aviation)}}A ski-jump converts part of the aircraft's forward motion to upward motion through the use of a curved ramp located at the end of the flight deck. As a result, the aircraft starts out its flight with a positive rate-of-climb. This allows heavier aircraft to take off even though the lift generated is smaller. Gravity causes the upward velocity to decline, but the aircraft continues to accelerate after leaving the flight deck. By the time the upward velocity has decayed to zero, the aircraft is going fast enough to attain stable flight. Ski-jumps can be used to enable conventional aircraft to takeoff on STOBAR aircraft carriers. They can also enable heavier payloads for STOVL aircraft. Flexible decksAn idea tested, but never put into service, was the flexible or inflated, air-cushioned, "rubber deck". In the early jet age it was recognised that eliminating the landing gear for carrier borne aircraft would improve the flight performance and range, since the space taken by the landing gear could be used to hold additional fuel tanks. This led to the concept of a deck that would absorb the energy of landing.[21] With the introduction of jet aircraft the risk of damaging propellers was no longer an issue, though take off would require some sort of launching cradle.[22] Tests were carried out with a de Havilland Sea Vampire flown by test pilot Eric "Winkle" Brown onto a flexible deck fitted to {{HMS|Warrior|R31|6}}.[23] The deck consisted of a rubberised sheet fully supported on multiple layers of pressurised fire hose.[24] Supermarine designed its Type 508 for rubber deck landings. The flexible deck idea was found to be technically feasible but was abandoned, as the weight of carrier aircraft increased and there were always doubts about the ability of an average pilot to land in this way. The Type 508 was subsequently developed into a conventional carrier aircraft, the Supermarine Scimitar. The US Navy evaluated a shore-based flexible deck made by Firestone Tire and Rubber Co. using two modified Grumman F9F-7 Cougars. Three US pilots had participated in the British flexible deck trials at Farnborough and the US Navy, despite liaison with the British, partially redid the Farnborough trials, with 23 landings at Patuxent River, before cancelling the project in March 1956 for similar reasons.[25] OtherUnusual alternatives to flight decks have been proposed for use in the jet age:
See also{{Commons category|Flight decks}}
References1. ^{{cite book |title=NATOPS Instrument Flight Manual NAVAIR 00-80T-112 : "Helicopter Operation Procedures for Air-Capable Ships" |year=2006 |publisher=Naval Air Systems Command, Department of the Navy}} {{DEFAULTSORT:Flight Deck}}2. ^{{cite newspaper The Times |articlename=Flight From the Hibernia |day_of_week=Friday |date=10 May 1912 |page_number=8 |issue=39895 |column=3}} 3. ^{{cite book |title=American and British Aircraft Carrier Development, 1919-1941 |first1=Thomas C. |last1=Hone |first2=Norman |last2=Friedman |first3=Mark D. |last3=Mandeles |location=Annapolis, Maryland |publisher=Naval Institute Press |year=1999 |isbn=9781557503824 |page=125}} 4. ^{{cite book |author=USS Bennington |title=Action Report, Operations in Support Of The Occupation Of Okinawa Including Strike Against Kanoya Airfield, Kyushu. 28 May to 10 June 1945 |page=18 |quote=On June 5, 1945, USS Bennington reported that her maximum hangar capacity was 51 aircraft, 15 SB2Cs and 36 F4Us, and that 52 were carried as a deck park. At that time she carried 15 TBMs, 15 SB2Cs and the rest were a mix of F6Fs and F4Us. She was prompted to utilize, and report on, her maximum hangar storage due to a Typhoon}} 5. ^{{cite book |editor-last=Eadon |editor-first=Stuart |title=Kamikaze, The Story of the British Pacific Fleet |publisher=Worcester |year=1991 |isbn=1-872017-23-1 |pages=338–339 |quote=In nine kamikaze strikes "...The Fleet Air Arm suffered...44 personnel killed...By contrast {{USS|Bunker Hill|CV-17|2}} lost 387 dead in the Kamikaze attack on 11th of May 1945."}} 6. ^{{cite |last=Roberts |first=John |title=British Warships of the Second World War |location=London, UK |publisher=Chatham Publications |year=2000 |page=62 |isbn=9781861761316}} 7. ^{{cite |last=Brown |first=David |title=Warship Profile No. 11: HMS Illustrious Aircraft Carrier 1939–1956, Operational History |location=Windsor, Berkshire |publisher=Profile Publications |year=1971 |page=257 |quote=42 F4U Corsairs and 15 Fairey Barracudas}} 8. ^{{cite |last=Roberts |first=John |title=British Warships of the Second World War |location=London, UK |publisher=Chatham Publications |year=2000 |page=61 |isbn=9781861761316}} 9. ^{{cite web |url= http://www.navweaps.com/index_oob/OOB_WWII_Pacific/OOB_WWII_Carrier-Raids_Home-Islands.htm |title=Order of Battle - Carrier Raids on the Home Islands : 24-28 July 1945 |first=Daniel |last=Muir |work=navweaps.com |year=2004 |accessdate=9 November 2015 |quote=HMS Implacable: 48 Seafires, 21 Avengers and 12 Fireflies}} 10. ^{{cite |last=Roberts |first=John |title=The Aircraft Carrier Intrepid |location=London, UK |publisher=Conway Maritime Press |year=1982 |isbn=9780851772516}} 11. ^{{cite web |url= http://www.navweaps.com/index_oob/OOB_WWII_Pacific/OOB_WWII_Carrier-Raids_Home-Islands.htm |title=Order of Battle - Carrier Raids on the Home Islands : 24-28 July 1945 |first=Daniel |last=Muir |work=navweaps.com |year=2004 |accessdate=9 November 2015 |quote=USS Bennington: 37 Hellcats, 37 Corsairs, 15 Helldivers and 15 Avengers}} 12. ^{{cite book |last=Francillon |first=René |title=US Navy Carrier Airgroups Pacific, 1941-1945 |location=London |publisher=Osprey Press |year=1978 |isbn=9780850452914}} 13. ^{{cite |last=Cracknell |first=William H. |title=Warship Profile No. 15: USS Enterprise (CVAN 65) Nuclear Attack Carrier |location=Windsor, Berkshire |publisher=Profile Publications |year=1972 |page=56}} 14. ^{{cite web |url=http://www.denniscambell.org.uk/4663/4690.html |title=The Angled Deck Story |work=denniscambell.org.uk |year=2012 |accessdate=9 November 2015}} 15. ^{{cite web |url=http://www.fleetairarmoa.org/fleet-air-arm-oa-history |title=History of Fleet Air Arm Officers Association |work=FAAOA.org |year=2015 |accessdate=9 November 2015}} 16. ^{{cite journal |title=Innovation in Carrier Aviation |first1=Thomas C. |last1=Hone |first2=Norman |last2=Friedman |first3=Mark D. |last3=Mandeles |journal=Newport Paper 37 |publisher=Naval War College Press |year=2011}}; abridged findings published as {{cite journal |title=The Development of the Angled-Deck Aircraft Carrier |journal=Naval War College Review |date=Spring 2011 |volume=64 |number=2 |pages=63–78}} 17. ^1 2 3 4 5 {{cite web |url=http://www.navy.gov.au/history/angled-flight-deck |title=The angled flight deck |accessdate=22 January 2013 |work=Sea Power Centre Australia |publisher=Royal Australian Navy}} 18. ^1 {{cite book |last=Friedman |first=Norman |title=U.S. Aircraft Carriers: An Illustrated Design History |url=https://books.google.com/books?id=-UT7MDTeKj8C&pg=PA188&lpg=PA188&dq=carrier+flight+deck+modification&ct=result#PPA264,M1 |year=1983 |location=Annapolis, Maryland |publisher=Naval Institute Press |isbn=978-0-87021-739-5 |page=188}} 19. ^{{cite web|url=http://www.chinfo.navy.mil/navpalib/ships/carriers/histories/cv41-midway/cv41-midway.html |title=USS Midway CV-41 |work=chinfo.navy.mil |deadurl=yes |archiveurl=https://web.archive.org/web/20081228171944/http://www.chinfo.navy.mil/navpalib/ships/carriers/histories/cv41-midway/cv41-midway.html |archivedate=December 28, 2008 }} 20. ^{{cite web|url=http://www.history.navy.mil/nan/backissues/2000s/2000/ja2000/ppp.pdf |archive-url=https://web.archive.org/web/20041102054425/http://history.navy.mil/nan/backissues/2000s/2000/ja2000/ppp.pdf |dead-url=yes |archive-date=2004-11-02 |title=Awards |format=PDF }} 21. ^{{cite patent |country=GB| number=742240 |status=patent |title=Improvements in or relating to apparatus for facilitating landing of aircraft |pubdate=| gdate=1955-12-21 |fdate=| pridate=| inventor=Arthur Davenport |assign1=Westland Aircraft Ltd}} 22. ^{{cite web |url=http://www.thunder-and-lightnings.co.uk/scimitar/history.php |title=Supermarine Scimitar - History |first=Damien |last=Burke |work=Thunder & Lightnings |year=2012 |accessdate=9 November 2015}} 23. ^{{cite web |url=http://www.livingwarbirds.com/de-havilland-vampire.php |title=de Havilland DH.100 Vampire |work=livingwarbirds.com |accessdate=9 November 2015}} 24. ^Farnborough and the Fleet Air Arm. Geoffrey G.J.Cooper 2008, Midland Publishing, {{ISBN|978 1 85780 306 8}} 25. ^"U.S.Naval Air Superiority, Development Of Shoipborne Jet Fighters 1943-1962" Tommy H. Thomason 2007, Specialty Press, {{ISBN|978-1-58007-110-9}}, pp.190/191 26. ^{{cite web|first=Greg |last=Goebel |url=http://www.wingweb.co.uk/aircraft/Harrier_VTOL_Jump-Jet_part4.html |title=The full story of the Harrier "Jump-Jet" Part Four - the "Second Generation" Harriers - The BAe / MDD AV-8B Harrier II, GR.5, GR.7, GR.9 & T.10 Harriers |publisher=Wingweb.co.uk |date= |accessdate=2013-11-10 |deadurl=yes |archiveurl=https://web.archive.org/web/20131019135316/http://www.wingweb.co.uk/aircraft/Harrier_VTOL_Jump-Jet_part4.html |archivedate=2013-10-19 |df= }} 2 : Aircraft carriers|Naval aviation technology |
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