The Douglas DC-8 (sometimes McDonnell Douglas DC-8) is a narrow-body airliner
built by the American Douglas Aircraft Company
After losing the May 1954 US Air Force tanker competition to the Boeing KC-135
, Douglas announced in July 1955 its derived jetliner project.
In October 1955, Pan Am
made the first order along with the competing Boeing 707
, and many other airlines followed.
The first DC-8 was rolled out in Long Beach Airport
on 9 April 1958 and flew for the first time on 30 May.
certification was achieved in August 1959 and the DC-8 entered service with Delta Air Lines
on September 18.
The six-abreast, low wing airliner was a four-engined jet aircraft
, the initial variants are long.
The DC-8-10 was powered by Pratt & Whitney JT3C
turbojets and had a MTOW
, the DC-8-20 had more powerful JT4A
turbojets for a MTOW.
models had more fuel capacity and up to MTOW, powered JT4As for the Series 30 and by Rolls-Royce Conway
turbofans for the Series 40.
The Pratt & Whitney JT3D
powered the later DC-8-50 and freighter
s versions reached a MTOW of .
The improved Series 60 was announced in April 1965.
The DC-8-61 was stretched by for 180–220 seats in mixed-class and a MTOW of .
It first flew on March 14, 1966, was certified on September 2, 1966, and entered service with United Airlines
in February 1967.
The long-range DC-8-62 followed in April 1967, stretched by , could seat up to 189 passengers over with a larger wing for a MTOW up to .
The DC-8-63 had the long fuselage and the enlarged wing, freighters MTOW reached .
The DC-8 was produced until 1972 with 556 aircraft built. It was superseded by larger wide-body airliner
s including Douglas' DC-10
In 1975, the Series 70 retrofit was proposed with the quieter and more fuel-efficient CFM56
Some re-engined freighters are still in use.
After World War II Douglas had a commanding position in the commercial aviation
had pointed the way to the modern all-metal airliner in 1933 with its Model 247
, but Douglas, more than any other company, made commercial air travel a reality. Douglas produced a succession of piston-engined aircraft (DC-2
, and DC-7
) through the 1930s, 1940s, and 1950s. When de Havilland
flew the first jet airliner, the Comet
, in 1949, Douglas felt no need to rush into anything new.
De Havilland's pioneering Comet entered airline service in 1952. Initially, it was a success, but it was grounded in 1954 after two fatal accidents which were subsequently attributed to rapid metal fatigue
failure of the pressure cabin. The aircraft industry as a whole gained considerable benefit from what was learned and resulted in considerable attention to detail design in the DC-8 pressure cabin. In 1952 Douglas remained the most successful of the commercial aircraft manufacturers. They had almost 300 orders on hand for the piston-engined DC-6 and its successor, the DC-7, which had yet to fly. The Comet disasters, and the airlines' subsequent lack of interest in jets, seemed to show the wisdom of their staying with propeller
Boeing took the bold step of starting to plan a pure-jet airliner as early as 1949. Boeing's military arm
had gained experience with large, long-range jets through the B-47 Stratojet
(first flight 1947) and the B-52 Stratofortress
(1952). With thousands of jet bombers on order or in service, Boeing had developed a close relationship with the US Air Force
's Strategic Air Command
(SAC). Boeing also supplied the SAC's refueling aircraft, the piston-engined KC-97 Stratofreighter
s, but these were too slow and low flying to easily work with the new jet bombers. The B-52, in particular, had to descend from its cruising altitude and then slow almost to stall speed to work with the KC-97.
Believing that a requirement for a jet-powered tanker was a certainty, Boeing started work on a new jet aircraft for this role that could be adapted into an airliner. As an airliner, it would have similar seating capacity
to the Comet, but its swept wing
would give it higher cruising speed and better range. First presented in 1950 as the Model 473-60C, Boeing failed to generate any interest in the airlines. Boeing remained convinced that the project was worthwhile, and decided to press ahead with a prototype, the Boeing 367-80
("Dash-80"). After spending $16 million of their own money on construction, the Dash-80 rolled out on May 15, 1954, and flew the next month. Boeing's plans became obvious, despite the misleading older model number.
Early design phase
Douglas secretly began jet transport project definition studies in mid-1952. By mid-1953 these had developed into a form similar to the final DC-8; an 80-seat, low-wing aircraft with four Pratt & Whitney JT3C turbojet
engines, 30° wing sweep, and an internal cabin diameter of to allow five-abreast seating. Maximum weight was to be 190,000 lb (86 metric tons), and range was estimated to be about .
Douglas remained lukewarm about the jet airliner project but believed that the Air Force tanker contract would go to two companies for two different aircraft, as several USAF transport contracts in the past had done. In May 1954, the USAF circulated its requirement for 800 jet tankers to Boeing, Douglas, Convair, Fairchild, Lockheed, and Martin. Boeing was just two months away from having its prototype in the air. Just four months after issuing the tanker requirement, the USAF ordered the first 29 KC-135
s from Boeing. Besides Boeing's ability to provide a jet tanker promptly, the flying-boom air-to-air refueling system was also a Boeing product from the KC-97.
was shocked by the rapidity of the decision which, he said, had been made before the competing companies even had time to complete their bids. He protested to Washington, but without success. Having started on the DC-8 project, Douglas decided that it was better to press on than give up. Consultations with the airlines resulted in several changes: the fuselage was widened by to allow six-abreast seating. This led to larger wings and tail surfaces and a longer fuselage. The DC-8 was announced in July 1955. Four versions were offered to begin with, all with the same long airframe with a wingspan, but varying in engines and fuel capacity, and with maximum weights of about 240,000–260,000 lb (109–118 metric tons). Douglas steadfastly refused to offer different fuselage sizes. The maiden flight was planned for December 1957, with entry into revenue service in 1959. Well aware that they were lagging behind Boeing, Douglas began a major marketing push.
Douglas' previous thinking about the airliner market seemed to be coming true; the transition to turbine power looked likely to be to turboprops rather than turbojets. The pioneering 40–60-seat Vickers Viscount
was in service and proving popular with passengers and airlines: it was faster, quieter, and more comfortable than piston-engined types. Another British rival was the 90-seat Bristol Britannia
, and Douglas's main rival in the large airliner market, Lockheed, had committed to the short to medium range 80–100-seat turboprop Electra
, with a launch order from American Airlines
for 35 and other orders flowing in. Meanwhile, the Comet remained grounded, the French 90-passenger twin jet Sud Aviation Caravelle
prototype had just flown for the first time, and the 707 was not expected to be available until late 1958. The major airlines were reluctant to commit themselves to the huge financial and technical challenges of jet aircraft. However, no one could afford ''not'' to buy jets if their competitors did.
There the matter rested until October 1955, when Pan American World Airways
placed simultaneous orders with Boeing for 20 707s and Douglas for 25 DC-8s. To buy one expensive and untried jet-powered aircraft type was brave: to buy both was, at the time, unheard of. In the closing months of 1955, other airlines rushed to follow suit: Air France
, American Airlines, Braniff International Airways
, Continental Airlines
, and Sabena
ordered 707s; United Airlines
, National Airlines
, Eastern Air Lines
, Japan Air Lines
, and Scandinavian Airlines System
(SAS) chose the DC-8. In 1956, Air India, BOAC
, and TWA added over 50 to the 707 order book, while Douglas sold 22 DC-8s to Delta, Swissair, TAI, Trans Canada
, and UAT. By the start of 1958, Douglas had sold 133 DC-8s compared to Boeing's 150 707s.
Production and testing
Donald Douglas proposed to build and test the DC-8 at Santa Monica Airport
, which had been the birthplace of the DC-3 and home to a Douglas plant that employed 44,000 workers during World War II
. To accommodate the new jet, Douglas asked the city of Santa Monica, California
to lengthen the airport's 5,000-foot runway. Following complaints by neighboring residents, the city refused, so Douglas moved its airliner production line to Long Beach Airport
. The first DC-8 ''N8008D'' was rolled out of the new Long Beach
factory on 9 April 1958 and flew for the first time, in Series 10 form, on 30 May for two hours seven minutes with the crew being led by A.G. Heimerdinger.
Later that year an enlarged version of the Comet finally returned to service, but too late to take a substantial portion of the market: de Havilland had just 25 orders. In August Boeing had begun delivering 707s to Pan Am. Douglas made a massive effort to close the gap with Boeing, using no fewer than ten aircraft for flight testing to achieve FAA
certification for the first of the many DC-8 variants in August 1959. Much needed to be done: the original air brakes on the lower rear fuselage were found ineffective and were deleted as engine thrust reversers had become available; unique leading-edge slots
were added to improve low-speed lift; the prototype was 25 kn (46 km/h) short of its promised cruising speed and a new, slightly larger wingtip had to be developed to reduce drag. Also, a recontoured wing leading edge was later developed to extend the chord 4% and reduce drag at high Mach numbers.
On August 21, 1961, a Douglas DC-8 broke the sound barrier
at Mach 1.012 (660 mph/1,062 km/h) while in a controlled dive through and maintained that speed for 16 seconds. The flight was to collect data on a new leading-edge design for the wing, and while doing so, the DC-8 became the first civilian jet – and the first jet airliner – to make a supersonic flight. The aircraft was DC-8-43 registered CF-CPG later delivered to Canadian Pacific Air Lines
. The aircraft, crewed by Captain William Magruder, First Officer Paul Patten, Flight Engineer Joseph Tomich and Flight Test Engineer Richard Edwards, took off from Edwards Air Force Base
, and was accompanied to altitude by an F-104 Starfighter
supersonic chase aircraft flown by Chuck Yeager
"I Was There: When the DC-8 Went Supersonic, The day a Douglas DC-8 busted Mach 1"
Air & Space/Smithsonian, August 2011, pp. 56–57.
Entry into service
On September 18, 1959, the DC-8 entered service with Delta Air Lines and United Airlines.
According to the Delta Air Lines website, the air carrier was the first to operate the DC-8 in scheduled passenger service. By March 1960, Douglas had reached their planned production rate of eight DC-8s a month. Despite a large number of DC-8 early models available, all used the same basic airframe, differing only in engines, weights and details; in contrast, Boeing's rival B707
range offered several fuselage lengths and two wingspans: the original 707-120, a version that sacrificed space to gain longer range, and the stretched 707-320, which at overall had more cabin space than the DC-8. Douglas' refusal to offer different fuselage sizes made it less adaptable and forced Delta and United to look elsewhere for short to medium range types. Delta ordered Convair 880
s, and United chose the newly developed short-fuselage 707-020. United prevailed on Boeing to rename the new variant the "Boeing 720
" in case the public thought they were dissatisfied with the DC-8. Pan Am never reordered the DC-8 and Douglas gradually lost market share to Boeing. In 1962 DC-8 sales dropped to just 26, followed by 21 in 1963 and 14 in 1964; many were for the Jet Trader rather than the more prestigious passenger versions. In 1967, Douglas merged with the McDonnell Aircraft Corporation
, becoming McDonnell Douglas
In April 1965, Douglas announced belated fuselage stretches for the DC-8 with three new models known as the ''Super Sixties''. The DC-8 program had been in danger of closing with fewer than 300 aircraft sold, but the Super Sixties brought fresh life to it. By the time production ceased in 1972, 262 of the stretched DC-8s had been made. With the ability to seat 269 passengers, the DC-8 Series 61 and 63 had the largest passenger-carrying capacity available. That remained so until the Boeing 747
arrived in 1970. The DC-8-62 featured a shorter fuselage when compared with the Series 61 and 63 but was capable of nonstop long-range operations.
All the earlier jetliners were noisy by modern standards. Increasing traffic densities and changing public attitudes led to complaints about aircraft noise and moves to introduce restrictions. As early as 1966 the Port Authority of New York and New Jersey
expressed concern about the noise to be expected from the then still-unbuilt DC-8-61, and operators had to agree to operate it from New York at lower weights to reduce noise. By the early 1970s, legislation for aircraft noise standards was being introduced in many countries, and the 60 Series DC-8s were particularly at risk of being banned from major airports.
In the early 1970s, several airlines approached McDonnell Douglas for noise reduction modifications to the DC-8 but nothing was done. Third parties had developed aftermarket hushkits
but there was no real move to keep the DC-8 in service. Finally, in 1975, General Electric
began discussions with major airlines to fit the new and vastly quieter Franco-American CFM56
engine to both DC-8s and 707s. MDC remained reluctant but eventually came on board in the late 1970s and helped develop the Series 70.
The Super Seventies were a great success: roughly 70% quieter than the 60 Series and, at the time of their introduction, the world's quietest four-engined airliner. As well as being quieter and more powerful, the CFM56 was up to 23% more fuel-efficient than the JT3D, which reduced operating costs and extended the range.
By 2002, of the 1,032 Boeing 707
s and 720s
manufactured for commercial use, just 80 remained in service – though many of those 707s were converted for USAF
use, either in service or for spare parts. Of the 556 DC-8s made, around 200 were still in commercial service in 2002, including about 25 50-Series, 82 of the stretched 60-Series, and 96 out of the 110 re-engined 70-Series. Most of the surviving DC-8s are now used as freighters. In May 2009, 97 DC-8s were in service following UPS's
decision to retire their remaining fleet of 44. In January 2013, an estimated 36 DC-8s were in use worldwide. As a result of aging, increasing operating costs and strict noise and emissions regulations, the number of active DC-8s continues to decline, with the youngest airframes nearing a half-century of age.
For domestic use, powered by 13,500 lb (60.5 kN) Pratt & Whitney JT3C
-6 turbojets with water injection. The initial DC-8-11 model had the original wingtips used on the prototype, and all were upgraded to DC-8-12 standard. The DC-8-12 featured the new low-drag wingtips and leading-edge slots
, 80 inches long between the engines on each wing and 34 inches long inboard of the inner engines. These unique devices were covered by doors on the upper and lower wing surfaces that opened for low-speed flight and closed for cruise. The maximum weight increased from . This model was originally named "DC-8A" until the series 30 was introduced.
30 DC-8-10s were built: 23 for United and 6 for Delta, plus the prototype. By the mid sixties United had converted 16 of its 21 surviving aircraft to DC-8-20 standard and the other 5 to -50s. Delta converted its 6 to DC-8-50s. (The prototype was itself also converted to a DC-8-50.)
Higher-powered 15,800 lb (70.8 kN) thrust Pratt & Whitney JT4A
-3 turbojets (without water injection) allowed a weight increase to . 33 DC-8-20s were built plus 16 converted DC-8-10s.
This model was originally named "DC-8B" but was renamed when the series 30 was introduced.
For intercontinental routes, the three Series 30 variants combined JT4A engines with a one-third increase in fuel capacity and strengthened fuselage and landing gear. The DC-8-31 was certified in March 1960 with 16,800 lb (75.2 kN) JT4A-9 engines for maximum takeoff weight. The DC-8-32 was similar but allowed weight. The DC-8-33 of November 1960 substituted 17,500 lb (78.4 kN) JT4A-11 turbojets, a modification to the flap linkage to allow a 1.5° setting for more efficient cruise, stronger landing gear, and maximum weight. Many -31 and -32 DC-8s were upgraded to this standard. A total of 57 DC-8-30s were produced (five of which were later upgraded to DC-8-50 standard).
The DC-8-40 was essentially the -30 but with 17,500 lb (78.4 kN) Rolls-Royce Conway
engines for better efficiency, less noise and less smoke. The Conway was an improvement over the turbojets that preceded it, but the Series 40 sold poorly because of the traditional reluctance of U.S. airlines to buy a foreign product and because the still-more-advanced Pratt & Whitney JT3D
turbofan was due in early 1961. The DC-8-41 and DC-8-42 had weights of respectively, the DC-8-43 had the 1.5° flap setting of the -33 and introduced a 4% leading-edge wing extension to reduce drag and increase fuel capacity slightly – the new wing improved range by 8%, lifting capacity by 6,600 lb (3 metric tons), and cruising speed by better than . It was used on all later DC-8s. The first DC-8-40 was delivered in 1960; 32 were built (of which three would eventually be converted to DC-8-50s).
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The definitive short-fuselage DC-8 came with the same engine that powered the vast majority of 707s, the [[Pratt & Whitney JT3D">JT3D. Twenty earlier DC-8s were converted to this standard. All but the -55 were certified in 1961. The DC-8-51, DC-8-52 and DC-8-53 all had 17,000 lb (76.1 kN) JT3D-1 or 18,000 lb (80.6 kN) JT3D-3B engines, varying mainly in their weights: , and respectively. The DC-8-55 arrived in June 1964, retaining the JT3D-3B engines but with strengthened structure from the freighter versions and maximum weight. 142 DC-8-50s were built plus the 20 converted from Series 10/30/40.
* DC-8 Jet Trader: Douglas approved the development of freighter versions of the DC-8 in May 1961, based on the Series 50. An original plan to fit a fixed bulkhead separating the forward ⅔ of the cabin for freight, leaving the rear cabin for 54 passenger seats was soon replaced by a more practical one to use a movable bulkhead and allow anywhere between 25 and 114 seats with the remainder set aside for cargo. A large cargo door was fitted into the forward fuselage, the cabin floor was reinforced and the rear pressure bulkhead was moved by nearly to make more space. Airlines could order a windowless cabin but only United did, ordering 15 in 1964. The DC-8F-54 had a maximum takeoff weight of and the DC-8F-55 . Both used 18,000 lb (80.6 kN) JT3D-3B powerplants. 62 aircraft built (plus one converted from a standard DC-8-50 and two of the three converted DC-8-40s).
* EC-24A: A single former United Airlines DC-8-54 (F) was used by the [[United States Navy]] as an [[electronic warfare]] training platform. It was retired in October 1998 and is now in storage with the [[309th Aerospace Maintenance and Regeneration Group]].
Super 60 Series
* DC-8 Series 61: The "Super DC-8" Series 61 was designed for high capacity and medium range. It had the same wings, engines and pylons as the -55, and sacrificed range to gain capacity. Having decided to stretch the DC-8, Douglas inserted a plug in the forward fuselage and a plug aft, taking overall length to . The added length required strengthening of the structure, but the basic DC-8 design already had sufficient ground clearance to permit the one-third increase in cabin size without requiring longer landing gear.
[ The variant first flew on March 14, 1966, and was certified on September 2, 1966, at a maximum weight of .] Deliveries began in January 1967 and it entered service with United Airlines in February 1967. It typically carried 180–220 passengers in mixed-class configuration, or 259 in high-density configuration. [ A cargo door equipped DC-8-61CF was also available. 78 -61s and 10 -61CFs were built.] [
* DC-8 Series 62: The long-range Series 62 followed in April 1967. It had a more modest stretch, two plugs fore and aft of the wing taking overall length to , and a number of modifications to provide greater range. wingtip extensions reduced drag and added fuel capacity, and Douglas redesigned the engine pods, extending the pylons and substituting new shorter and neater nacelles, all in the cause of drag reduction. The 18,000 lb JT3D-3B was retained but the engine pylons were redesigned to eliminate their protrusion above the wing and make them sweep forward more sharply, so that the engines were some further forward. The engine pods were also modified with a reduction in diameter and the elimination of the and bypass duct. The changes all improved the aircraft's aerodynamic efficiency. The DC-8 Series 62 is slightly heavier than the or at , and able to seat up to 189 passengers, the had a range with full payload of about , or about the same as the but with 40 extra passengers. Many late production had maximum takeoff weight and were known as the . Also available as the cargo door equipped convertible or all cargo . Production included 51 DC-8-62s, 10 , and 6 .] [
* DC-8 Series 63: The "Super DC-8" Series 63 was the final new-build variant and entered service in June 1968. It had the long fuselage of the , the aerodynamic refinements and increased fuel capacity of the and 19,000 lb (85.1 kN) JT3D-7 engines.] [ This allowed a maximum takeoff weight of .] [ Like the , the Series 63 was also available as a cargo door equipped or all cargo . The freighters had a further increase in Maximum Take Off Weight to . Eastern Air Lines bought six with the strengthened floor of the freighters but no cargo door. Production included 41 DC-8-63s, 53 , 7 , and 6 .] [ The Flying Tiger Line was a major early customer for the DC-8-63F.
Super 70 Series
The DC-8-71, DC-8-72, and DC-8-73 were straightforward conversions of the -61, -62 and -63 primarily involving the replacement of the JT3D engines with more fuel-efficient 22,000 lb (98.5 kN) CFM56-2 high-bypass turbofans with new nacelles and pylons built by Grumman Aerospace and fairing of the air intakes below the nose. The DC-8-71 achieved the same end but required more modification because the -61 did not have the improved wings and relocated engines of the -62 and -63. Maximum takeoff weights remained the same, but there was a slight reduction in payload because of the heavier engines. All three models were certified in 1982 and a total of 110 60-Series DC-8s were converted
by the time the program ended in 1988. DC-8-70 conversions were overseen by Cammacorp with CFMI, McDonnell Douglas, and Grumman Aerospace as partners. Cammacorp was disbanded after the last aircraft was converted.
, four DC-8s remain in commercial service, with three operating for Trans Air Cargo Service and one with CFS Air Cargo. Based in Lima, Peru, Skybus Cargo Charters lists three DC-8-70s in its fleet. Its Air operator's certificate was issued in August 2016. Disaster relief organization Samaritan's Purse operates a DC-8-72. NASA operates one DC-8 for research including archaeology, ecology, geography, hydrology, meteorology, oceanography, volcanology, atmospheric chemistry, cryospheric science, soil science, and biology projects.
Accidents and incidents
, the DC-8 had been involved in 146 incidents, including 84 hull-loss accidents, with 2,255 fatalities. The DC-8 has also been involved in 46 hijackings with 2 fatalities. The deadliest incident involving the DC-8 was Nigeria Airways Flight 2120 which crashed on July 11, 1991 with 261 fatalities.
Aircraft on display
The following museums have DC-8s on display or in storage:
* The forward section of a DC-8-32 operated by Japan Airlines, ''Fuji'', is on display at Haneda Airport, Tokyo. The first jet airliner used by the airline, it was retired from service in 1974 for use as a cockpit trainer.
* 45280 – DC-8-21 on display at the Chinese Aviation Museum in Datangshan, China. It is an ex-United Airlines aircraft formerly used as flying eye hospital by ORBIS International.
* 45570 – DC-8-33 on display at the Musée de l'Air at the Paris–Le Bourget Airport in Paris, France. It is an ex-French Air Force electronic warfare aircraft and has been on display since its retirement in 2001.
* 45850 – DC-8-52 on display at the California Science Center in Exposition Park, Los Angeles, California. It is an ex-United Airlines aircraft and is on display outside near Downtown LA.
* 45922 – DC-8-62CF on display at the Naval Air Museum Barbers Point at Kalaeloa Airport in Kapolei, Hawaii since 2013, ex- Air Transport International.
* 46160 – DC-8-61 on display at the Shanghai Aerospace Enthusiasts Centre, ex-Japan Airlines.
* There is a DC 8 displayed at Kenneth Kaunda International Airport in Lusaka Zambia. It was operated as a Cargo plane by MK Airlines.
* Cearley, George Walker. ''The Douglas DC-8: A Pictorial History''. Dallas: G.W. Cearley Jr., 1992.
* Douglas Aircraft Co. ''The DC-8 Story''. Long Beach, CA: Douglas Aircraft Company, 1972.
* Douglas Aircraft Co. ''Douglas DC-8 Maintenance Manual''. Long Beach, CA: Douglas Aircraft Company, 1959. OCLC 10621428.
* Hubler, Richard G. ''Big Eight: A Biography of an Airplane''. New York: Duell, Sloan, and Pearce, 1960.
* Lundkvist, Bo-Goran. ''Douglas DC-8''. Coral Springs, FL: Lundkvist Aviation Research, 1983. OCLC 62220710.
* McDonnell-Douglas. ''The DC-8 Super-Sixty''. Long Beach, CA: McDonnell Douglas Corp. Sales Engineering Div., 1968.
* McDonnell-Douglas. ''The DC-8 Handbook''. Long Beach, CA: McDonnell Douglas Corp. Sales Engineering Div., 1982.
* Proctor, Jon, Machat, Mike, Kodeta, Craig. ''From Props to Jets: Commercial Aviatin's Transition to the Jet Age 1952–1962''. North Branch, MN: Specialty Press. .
* Vicenzi, Ugo. ''Early American Jetliners: Boeing 707, Douglas DC-8 and Convair CV880''. Osceola, WI: MBI Publishing. .
* Waddington, Terry. ''Douglas DC-8''. Miami, FL: World Transport Press, 1996. .
* Wilson, Stewart. ''Airliners of the World''. Fyshwick, Australia, ACT: Aerospace Publications Pty Ltd., 1999. .
* Wilson, Stewart. ''Boeing 707, Douglas DC-8, and Vickers VC-10''. Fyshwick, Australia, ACT: Aerospace Publications Pty Ltd., 1998. .
Boeing: Historical Snapshot: DC-8 Commercial Transport
Category:1950s United States airliners
Category:Aircraft first flown in 1958