请问以下这两款手机哪款值得买。x 20和r 11s_百度知道
请问以下这两款手机哪款值得买。x 20和r 11s
我有更好的答案
另一个就是拍照，因为处理器都是660，但是x20还有新智慧引擎这个得分点，比r11s好觉得x20挺值的，x20使用了双核像素，r11s还是单核
采纳率：70%
为您推荐：
您可能关注的内容
换一换
回答问题，赢新手礼包
个人、企业类
违法有害信息,请在下方选择后提交
色情、暴力
我们会通过消息、邮箱等方式尽快将举报结果通知您。拍照手机哪家强。x 20、r 11s和mix2拍照性能大对比_百度知道
拍照手机哪家强。x 20、r 11s和mix2拍照性能大对比
您的回答被采纳后将获得：
系统奖励15（财富值+成长值）+难题奖励20（财富值+成长值）
我有更好的答案
这三个模型现在更热,现在的图片和游戏,个人感觉是大x20的,具有双重关注所有像素,背光效果清晰细腻,有一种新的智能引擎+游戏引擎,在金光华KPL也是其职业联赛之前,游戏无忧无虑的感觉良好。
1条折叠回答
为您推荐：
换一换
回答问题，赢新手礼包
个人、企业类
违法有害信息,请在下方选择后提交
色情、暴力
我们会通过消息、邮箱等方式尽快将举报结果通知您。From Wikipedia, the free encyclopedia
The Douglas A-1 Skyraider (formerly AD) is an American single-seat
that saw service between the late 1940s and early 1980s. The Skyraider had a remarkably long a it became a -powered, -driven anachronism in the , and was nicknamed "Spad", after the .
It was operated by the
(USN), the
(USMC), and the
(USAF), and also saw service with the British , the , the
(VNAF), and others. It remained in U.S. service until the early 1970s, and was replaced in the U.S. by the .
The piston-engined Skyraider was designed during World War II to meet
requirements for a , single-seat, long-range, high performance /, to follow-on from earlier types such as the
and . Designed by
of the , prototypes were ordered on 6 July 1944 as the XBT2D-1. The XBT2D-1 made its first flight on 18 March 1945 and in April 1945, the USN began evaluation of the aircraft at the
(NATC). In December 1946, after a designation change to AD-1, delivery of the first production aircraft to a fleet squadron was made to VA-19A.
The AD-1 was built at Douglas'
plant in Southern California. In his memoir The Lonely Sky, test pilot
describes the routine yet sometimes hazardous work of certifying AD-1s fresh off the assembly line at a rate of two aircraft per day for delivery to the U.S. Navy in 1949 and 1950.
A Douglas XBT2D-1 Skyraider prototype.
The low-wing monoplane design started with a
, later upgraded several times. Its distinctive feature was large straight wings with seven
apiece. These gave the aircraft excellent low-speed maneuverability, and enabled it to carry a large amount of
over a considerable combat radius and loiter time for its size, comparable to much heavier subsonic or supersonic jets. The aircraft was optimized for the ground-attack mission and was armored against ground fire in key locations unlike faster fighters adapted to carry bombs, such as the
or , which were retired by U.S. forces before the 1960s.
Shortly after Heinemann began design of the XBT2D-1, a study was issued that showed for every 100 lb (45 kg) of weight reduction, the takeoff run was decreased by 8 ft (2.4 m), the combat radius increased by 22 mi (35 km) and the rate-of-climb increased by 18 ft/min (0.091 m/s). Heinemann immediately had his design engineers begin a program for finding weight-saving on the XBT2D-1 design, no matter how small. Simplifying the fuel system resulted in a reduction of 270 lb (120 kg); 200 lb (91 kg) by eliminating an internal bomb bay and hanging the bombs, drop tanks and rockets from t 70 lb (32 kg) by using a and 100 lb (45 kg) by using an older tailwheel design. In the end, Heinemann and his design engineers found over 1,800 lb (820 kg) of weight savings on the original XBT2D-1 design.
The Navy AD series was initially painted in ANA 623 Glossy Sea Blue, but during the 1950s following the Korean War, the color scheme was changed to light gull grey (FS26440) and white (FS27875). Initially using the gray and white Navy pattern, by 1967 the USAF began to paint its Skyraiders in a camouflaged pattern using two shades of green, and one of tan.
An A-1J of
loaded with ordnance for a mission in Vietnam in 1966.
Used by the USN over Korea and Vietnam, the A-1 was a primary close air support aircraft for the USAF and VNAF during the Vietnam War. The A-1 was famous for being able to take hits and keep flying. There was added armor plating around the cockpit area for added pilot protection. It was replaced beginning in the mid-1960s by the
as the Navy's primary medium-attack plane in - however Skyraiders continued to operate from the smaller .
The Skyraider went through seven versions, starting with the AD-1, then AD-2 and AD-3 with various minor improvements, then the AD-4 with a more powerful R-3350-26WA engine. The AD-5 was significantly widened, allowing two crew to sit side-by-side (this was not the first multiple-crew variant, the AD-1Q being a two-seater and the AD-3N a three-seater); it also came in a four-seat night-attack version, the AD-5N. The AD-6 was an improved AD-4B with improved low-level bombing equipment, and the final production version AD-7 was upgraded to a R-3350-26WB engine.
For service in Vietnam, USAF Skyraiders were fitted with the Stanley Yankee extraction system, which acted in a similar manner to an ejection seat, though with a twin rocket pulling the escaping pilot from the cockpit.
In addition to serving during Korea and Vietnam as an attack aircraft, the Skyraider was modified to serve as a carrier-based airborne early warning aircraft, replacing the . It fulfilled this function in the USN and , being replaced by the
and , respectively, in those services.
Skyraider production ended in 1957 with a total of 3,180 having been built. In 1962, the existing Skyraiders were redesignated A-1D through A-1J and later used by both the
in the Vietnam War.
An AD-4 Skyraider taking off from
during the Korean War
The Skyraider was produced too late to take part in World War II, but became the backbone of
aircraft carrier and
(USMC) strike aircraft sorties in the
(), with the first ADs going into action from
on 3 July 1950. Its weapons load and 10-hour flying time far surpassed the jets that were available at the time. On 2 May 1951, Skyraiders made the only
attack of the war, hitting the , then controlled by North Korea.
On 16 June 1953, a USMC AD-4 from
piloted by
George H. Linnemeier and CWO Vernon S. Kramer shot down a Soviet-built
biplane, the only documented Skyraider air victory of the war. AD-3N and -4N aircraft carrying bombs and flares flew night-attack sorties, and radar-equipped ADs carried out radar-jamming missions from carriers and land bases.
During the Korean War, AD Skyraiders were flown only by the U.S. Navy and U.S. Marine Corps, and were normally painted in dark navy blue. It was called the "Blue Plane" by enemy troops. Marine Corps Skyraiders suffered heavy losses when used in low-level close-support missions. To allow low-level operations to continue without unacceptable losses, a package of additional armor was fitted, consisting of 0.25–0.5 inches (6.4–12.7 mm) thick external aluminum armor plates fitted to the underside and sides of the aircraft's fuselage. The armor package weighed a total of 618 pounds (280 kg) and had little effect on performance or handling. A total of 128 Navy and Marine AD Skyraiders were lost in the Korean War – 101 in combat and 27 to operational causes. Most operational losses were due to the tremendous power of the AD. ADs that were "waved-off" during carrier recovery operations were prone to perform a fatal torque roll into the sea or the deck of the aircraft carrier if the pilot mistakenly gave the AD too much throttle. The torque of the engine was so great that it would cause the aircraft to rotate about the propeller and slam into the sea or the carrier.
On 26 July 1954, two Douglas Skyraiders from the aircraft carriers
shot down two
off the coast of
while searching for survivors after the
airliner three days previously, by .
A 1st SOS A-1E carrying a , 1968.
A 602nd SOS A-1H in June 1970.
As American involvement in the
began, the A-1 Skyraider was still the medium attack aircraft in many , although it was planned to be replaced by the
as part of the general switch to jet aircraft. Skyraiders from
participated in the first U.S. Navy strikes against
on 5 August 1964 as part of
in response to the , striking against fuel depots at , with one Skyraider from Ticonderoga damaged by , and a second from Constellation shot down, killing its pilot.
During the war, U.S. Navy Skyraiders shot down two North Vietnamese Air Force (NVAF)
jet fighters: one on 20 June 1965, a victory shared by
Clinton B. Johnson and
Charles W. Hartman III and one on 9 October 1966 by LTJG William T. Patton of . Using their cannons, this was the first gun kill of Vietnam. While on his very first mission, Navy pilot LTJG
took damage to his A-1H over Vietnam on 1 February 1966, and crash-landed in .
As they were released from U.S. Navy service, Skyraiders were introduced into the
(RVNAF). Skyraiders were also used by Air Force Special Operations Command for search and rescue air cover. They were also used by the USAF to perform one of the Skyraider's most famous roles: the "Sandy" helicopter escort on combat rescues. On 10 March 1966,
flew an A-1E mission and was awarded the
for rescuing Major "Jump" Myers at
Camp. USAF
piloted an A-1H on 1 September 1968 mission for which he was awarded the Medal of Honor. In that mission, despite damage to his aircraft and suffering serious burns, he returned to his base and reported the position of a downed U.S. airman.
A-1E Skyraiders fly in formation over South Vietnam on way to target on 25 June 1965. The aircraft are assigned to the , based at , South Vietnam.
After November 1972, all A-1s in U.S. service in
were transferred to the RVNAF. The Skyraider in Vietnam pioneered the concept of tough, survivable aircraft with long loiter times and large ordnance loads. The USAF lost 201 Skyraiders to all causes in Southeast Asia, while the Navy lost 65 to all causes. Of the 266 lost A-1s, five were shot down by surface-to-air missiles (SAMs), and three were shot down in air-to- two by North Vietnamese MiG-17s.
On the night of 29 August 1964, the first A-1E Skyraider was shot down and th it was flown by Capt. Richard D. Goss from the , 34th Tactical Group. The second A-1 was shot down on 29 April 1966, and the third A-1, Pilot Capt. Grant N. Tabor, was lost on 19 April 1967; both were from the . The fourth A-1 Skyraider was from Navy Squadron
flying a ferry flight from
(Philippines) to
and was lost to two Chinese MiG-17 on 14 February 1968. Lieutenant (j.g.) Joseph P. Dunn, USN, had flown too close to the Chinese held island of , and had been intercepted. Lieutenant Dunn's A-1H Skyraider 134499 (Canasta 404) was the last U.S. Navy A-1 lost in the war. He was observed to survive the ejection and deploy his raft, but was never found. Initially listed as MIA, he is now listed as KIA and posthumously promoted to the rank of Commander. Shortly thereafter, A-1 Skyraider naval squadrons transitioned to the A-6 Intruder,
In contrast to the Korean War, fought a decade earlier, the U.S. Air Force used the naval A-1 Skyraider for the first time in Vietnam. As the Vietnam War progressed, USAF A-1s were painted in , while USN A-1 Skyraiders were gray/ again, in contrast to the Korean War, when A-1s were painted dark blue.
A-1H "Paper Tiger II" carrying the toilet bomb in October 1965
In October 1965, to highlight the dropping of the six millionth pound of ordnance,
Clarence J. Stoddard of VA-25, flying an A-1H, dropped a special, one-time-only object in addition to his other munitions – a toilet.
An A-1H Skyraider of the VNAF 516th Fighter Squadron being loaded with napalm at Da Nang Air Base in 1967.
The A-1 Skyraider was the close air support workhorse of the RVNAF for much of the Vietnam War. The U.S. Navy began to transfer some of its Skyraiders to the RVNAF in September 1960, replacing the RVNAF's older . By 1962 the RVNAF had 22 of the aircraft in its inventory, and by 1968 an additional 131 aircraft had been received. Initially Navy aviators and crews were responsible for training their South Vietnamese counterparts on the aircraft, but over time responsibility was gradually transferred to the USAF.
The initial trainees were selected from among RVNAF Bearcat pilots who had accumulated 800 to 1200 hours flying time. They were trained at , Texas, and then sent to , California for further training. Navy pilots and crews in Vietnam checked out the Skyraiders that were being transferred to the RVNAF, and conducted courses for RVNAF ground crews.
Over the course of the war, the RVNAF acquired a total of 308 Skyraiders, and was operating six A-1 squadrons by the end of 1965. These were reduced during the period of
from 1968 to 1972, as the U.S. began to supply the South Vietnamese with more modern close air support aircraft, such as the
and , and at the beginning of 1968, only three of its squadrons were flying A-1s.
As the U.S. ended its direct involvement in the war, it transferred the remainder of its Skyraiders to the South Vietnamese, and by 1973, all remaining Skyraiders in U.S. inventories had been turned over to the RVNAF. Unlike their American counterparts, whose combat tours were generally limited to 12 months, individual South Vietnamese Skyraider pilots ran up many thousands of combat hours in the A-1, and many senior RVNAF pilots were extremely skilled in the operation of the aircraft.
Four Royal Navy Douglas Skyraider AEW.1s from D Flight , based at , in flight in the 1950s
acquired 50 AD-4W early warning aircraft in 1951 through the . All Skyraider AEW.1s were operated by , which provided four-plane detachments for the British carriers. One flight aboard
took part in the
was responsible for the training of the Skyraider crews at .
In 1960, the
replaced the Skyraiders, using the APS-20 radar of the Douglas aircraft. The last British Skyraiders were retired in 1962. In the late 1960s, the APS-20 radars from the Skyraiders were installed in
which were finally retired in 1991.
Fourteen British AEW.1 Skyraiders were sold to Sweden to be used by Svensk Flygtj?nst AB between 1962 and 1976. All military equipment was removed and the aircraft were used as
with the Swedish armed forces.
bought 20 ex-USN AD-4s as well as 88 ex-USN AD-4Ns and five ex-USN AD-4NAs with the former three-seaters modified as single-seat aircraft with removal of the radar equipment and the two operator stations from the rear fuselage. The AD-4N/NAs were initially acquired in 1956 to replace aging
in Algeria.
The Skyraiders were first ordered in 1956 and the first was handed over to the French Air Force on 6 February 1958 after being overhauled and fitted with some French equipment by Sud-Aviation. The aircraft were used until the end of the . The aircraft were used by the 20e Escadre de Chasse (EC 1/20 "Aures Nementcha", EC 2/20 "Ouarsenis" and EC 3/20 "Oranie") and EC 21 in the close air support role armed with rockets, bombs and .
The Skyraiders had only a short career in Algeria, but they nonetheless proved to be the most successful of all the ad hoc COIN aircraft deployed by the French. The Skyraider remained in limited French service until the 1970s. They were heavily involved in the civil war in Chad, at first with the Armée de l'Air, and later with a nominally independent
staffed by French mercenaries. The aircraft also operated under the French flag in Djibouti and on the island of Madagascar. When France at last relinquished the Skyraiders it passed the survivors on to client states, including Gabon, ,
and the . (several aircraft from Gabon and Chad have been recovered recently by French warbird enthusiasts and entered on the French civil register).
The French frequently used the aft station to carry maintenance personnel, spare parts and supplies to forward bases. In Chad they even used the aft station for a "bombardier" and his "special stores" – empty beer bottles – as these were considered as , thus not breaking the government-imposed rules of engagement, during operations against Libyan-supported rebels in the late 1960s and early 1970s.
The XBT2D-1 in 1945
A VC-35 AD-1Q in the late 1940s
AD-3Q, AD-4N, and AD-5N in 1955
An AD-4W AEW-aircraft landing on the
AD-5 in flight
An EA-1F (AD-5Q) ECM-aircraft, BuNo 135010, of
A VAW-11 AD-5W aboard , 1958
AD-6s from
Single-seat dive-bomber, torpedo-bomber prototype for the U.S. Navy.
Three-seat nig only three aircraft built.
Photographic reco only one built.
Two-seat electronics count one aircraft only.
BT2D-2 (XAD-2)
Upgr one prototype only.
The fi 242 built.
Two-seat electronic countermeasures version of the AD-1; 35 built.
AD-1 with radar countermeasures and tow target equipment, no armament and no
equipment.
Three-seat airborne early warning prototype. AD-3W one aircraft only.
Improved model, powered by 2,700 hp (2,000 kW) Wright R-6 built.
Unofficial designation for AD-2s used as remote-control aircraft, to collect and gather radioactive material in the air after nuclear tests.
Two-seat electronics countermeasures version of the AD-2; 21 built.
AD-2 with radar countermeasures and target towing equipment, no armament and no water one aircraft only.
Similar to XBT2D-1 except engine, increased fuel capacity.
Proposed turboprop version, initial designation of .
Stronger fuselage, improved landing gear, 125 built.
Anti-sub only two prototypes were built.
Three-seat
Electronics countermeasures version, countermeasures equipment relocated for 23 built.
Target towing aircraft, but most were delivered as the AD-3Q.
Airborne e 31 built.
AD-3W modified for ASW with Aeroproducts propellor
Strengthened landing gear, improved radar, G-2 compass, anti-G suit provisions, four 20 mm (.79 in) cannon and 14 Aero rocket launchers, capable of carrying up to 50 lb (23 kg) 372 built.
Specialized version designed to carry nuclear weapons, also armed with four 20  165 built plus 28 conversions.
Equipped for winter operations in K 63 conversions.
AD-4N (A-1D)
Three-seat
307 built.
Designation of 100 AD-4Ns without their night-attack equipment, but fitted with four 20 mm (0.79 in) cannon, for service in Korea as ground-attack aircraft.
Winterized version of the AD-4N; 36 conversions.
Two-seat electronic countermeasures version of the AD-4; 39 built.
Three-seat airborne e 168 built. A total of 50 AD-4Ws were transferred to the Royal Navy as Skyraider AEW Mk 1.
AD-5 (A-1E)
Side-by-side seating for pilot and co-pilot, 212 built.
AD-5N (A-1G)
Four-seat night attack version, with r 239 built.
AD-5Q (EA-1F)
Four-seat electronics cou 54 conversions.
One prototype to test
(MAD) anti-submarine equipment.
AD-5W (EA-1E)
Three-seat airborne early warning version with an APS-20 218 were built.
Utility version of the AD-5.
AD-6 (A-1H)
Single-seat attack aircraft with three dive brakes, centerline station stressed for 3,500 lb (1,600 kg) of ordnance, 30 in (760 mm) in diameter, combination 14/30 in (360/760 mm) bomb ejector and low/high al 713 built.
AD-7 (A-1J)
The final production model, powered by a R-3350-26WB engine, with structural improvements to increa 72 built.
Line drawings for the AD-4 Skyraider.
Data from McDonnell Douglas Aircraft since 1920
General characteristics
Length: 38 ft 10 in (11.84 m)
: 50 ft 0 1/4
in (15.25 m)
Height: 15 ft 8 1/4
in (4.78 m)
Wing area: 400.3 ft? (37.19 m?)
: 11,968 lb (5,429 kg)
Loaded weight: 18,106 lb (8,213 kg)
: 25,000 lb (11,340 kg)
(2,000 kW)
Performance
: 322 mph (280 , 518 km/h) at 18,000 ft (5,500 m)
: 198 mph (172 kn, 319 km/h)
: 1,316 mi (1,144 , 2,115 km)
: 28,500 ft (8,685 m)
: 2,850 ft/min (14.5 m/s)
: 45 lb/ft? (220 kg/m?)
: 0.15 hp/lb (250 W/kg)
Guns: 4 ×
autocannon
: 15 external hardpoints with a capacity of 8,000 lb (3,600 kg) and provisions to carry combinations of:
Other: bombs, torpedoes, mine dispensers, unguided rockets, and gun pods.
The A-1 Skyraider received various nicknames including: "Spad" and "Super Spad" (derived from the aircraft's AD designation, its relative longevity in service and an allusion to the "" aircraft of World War I), "Able Dog" (phonetic AD), "the Destroyer", "Hobo" (radio call sign of the USAF ), "Firefly" (a call sign of the ), "Zorro" (the call sign of the ), "The Big Gun", "Old Faithful", "Old Miscellaneous", "Fat Face" (AD-5/A-1E version, side-by-side seating), "Guppy" (AD-5W version), "Q-Bird" (AD-1Q/AD-5Q versions), "Flying Dumptruck" (A-1E), "Sandy" (the
call sign for Combat Search And Rescue helicopter escort), and "Crazy Water Buffalo" (South Vietnamese nickname).[]
Related development
Aircraft of comparable role, configuration and era
Related lists
Thornburg, Chris.
July 4, 2011, at the . WorldAirForces.Com, 3 December 2006. Retrieved: 24 March 2011.
Burgess and Rausa 2009, p. 7.
Parker, Dana T. Building Victory: Aircraft Manufacturing in the Los Angeles Area in World War II, p. 33, Cypress, CA, 2013. ISBN 978-0--4.
Bridgeman and Hazard 1955, pp. 38–40.
Popular Mechanics, January 1953, pp. 81-85, 248.
Johnson, E.R. "Able Dog." Aviation History, September 2008.
Mersky 1983, p. 144.
Faltum 1996, pp. 125–126.
Grossnick and Armstrong 1997
Jordan, Corey C.
A Frozen Hell... The Air War Over Korea, , 2001. Retrieved: 14 July 2011.
De Vine, Carl R. . Naval Aviation News, May 1953, p. 33.
December 19, 2008, at the . South China Morning Post, 27 July 1954.
Dorr Air Enthusiast 1988, p. 3.
Dorr and Bishop 1996, pp. 34–35.
Johnson, Clinton.
Untold Stories. Retrieved: 14 July 2011.
Dengler 1979
March 6, 2008, at the ., National Museum of the United States Air Force. Retrieved: 30 December 2007.
March 6, 2008, at the . National Museum of the United States Air Force. Retrieved: 30 December 2007.
U.S. Army Center of Military History, 16 July 2007. Retrieved: 23 December 2007.
Hobson 2001, pp. 268–269.
Johnson, Captain Clint.
USS Midway. Retrieved: 24 March 2011.
Chinnery 1997, p. 95.
Denehan 1997, pp. 10–11.
Denehan 2007
NASM. Retrieved: 7 October 2009.
Chinnery 1997, p. 96.
Baugher. Joe.
Douglas AD/A-1 Skyraider, 18 October 2001. Retrieved: 7 October 2009.
Francillon 1979, p. 403.
Francillon 1979, pp. 403–404.
Francillon 1979, p. 405.
September 7, 2015, at the ., Robert S. DeGroat, story appeared in the Feb 1996 issue of EAA Warbirds magazine. Retrieved: 25 March 2017.
Burgess, Richard R. and Rosario M. Rausa. US Navy A-1 Skyraider Units of the Vietnam War (Osprey Combat Aircraft #77). Oxford, UK: Osprey Publishing Limited, 2009.  .
Bridgeman, William and Jacqueline Hazard. The Lonely Sky. New York: Henry Holt & Co., 1955.  .
Chinnery, Philip D. Air Commando: Inside The Air Force Special Operations Command. London: St. Martin's Paperbacks, 1997.  .
Denehan, William, Major, USAF. From Crickets To Dragonflies: Training And Equipping The Republic of Vietnam Air Force . Maxwell Air Force Base, Alabama: Air Command and Staff College, Air University, 1997.
Dengler, Dieter. Escape from Laos. New York: Presidio Press, 1979.  .
. "Southeast Asian "Spad"... The Skyraider's War". , Thirty-six, May–August 1988. Bromley, UK:FineScroll. pp. 1–11, 73–77. ISSN .
Dorr, Robert F. and Chris Bishop. Vietnam Air War Debrief. London: Aerospace Publishing, 1996.  .
Drury, Richard S. My Secret War. Fallbrook, California: Aero Publishing Inc., 1979.  .
Faltum, Andrew. The Essex Aircraft Carriers. Baltimore, Maryland: The Nautical & Aviation Publishing Company of America, 1996.  .
Francillon, René J. McDonnell Douglas Aircraft since 1920. London: Putnam, 1979.  .
Grossnick, Roy A. and William J. Armstrong. United States Naval Aviation, . Annapolis, Maryland: Naval Historical Center, 1997.  .
Hobson, Chris. Vietnam Air Losses, USAF/USN/USMC, Fixed-Wing Aircraft Losses in Southeast Asia, . North Branch, Minnesota: Specialty Press, 2001.  .
McCarthy, Donald J. Jr. MiG Killers: A Chronology of US Air Victories in Vietnam . North Branch, Minnesota: Specialty Press, 2009.  .
Mersky, Peter B. U.S. Marine Corps Aviation: 1912 to the Present. Annapolis, Maryland: The Nautical and Aviation Publishing Company of America, 1983.  .
"Skyraider". , September 2008, Volume 136, Number 9; Cover and p. 38.
Smith, Peter C., Douglas AD Skyraider - Crowood Aviation Series. Marlborough Great Britain: Crowood Press, 1999,  .
Swanborough, Gordon and Peter M. Bowers. United States Navy Aircraft since 1911. London: Putnam, Second edition 1976.  .
United States Air Force Museum Guidebook. Wright-Patterson AFB Ohio: Air Force Museum Association, 1975.
Wikimedia Commons has media related to .
Wikisource has several original texts related to:
from Air Force Magazine
The short film
is available for free download at the
military aircraft
United States
designations, Army/Air Force and
attack aircraft designations
by manufacturer
/ bomber designations
: Hidden categories: