de Havilland Canada DHC-4 Caribou

de Havilland Canada DHC-4 Caribou
DHC-4 Caribou
A U.S. Army De Havilland Canada DHC-4 Caribou in flight.
Role STOL Transport
Manufacturer de Havilland Canada
First flight 30 July 1958
Introduction 1961
Primary users United States Army
United States Air Force
Royal Australian Air Force
Number built 307
Variants de Havilland Canada DHC-5 Buffalo

The de Havilland Canada DHC-4 Caribou (designated by the United States military as the CV-2 and later C-7 Caribou) is a Canadian-designed and produced specialized cargo aircraft with short takeoff and landing (STOL) capability. The Caribou was first flown in 1958 and although mainly retired from military operations, is still in use in small numbers as a rugged "bush" aircraft.

Contents

Design and development

A C-7 Caribou in the U.S. Army Transportation Museum, Fort Eustis, Virginia

The de Havilland Canada company's third STOL design was a big step up in size compared to its earlier DHC Beaver and DHC Otter, and was the first DHC design powered by two engines. The Caribou, however, was similar in concept in that it was designed as a rugged STOL utility. The Caribou was primarily a military tactical transport that in commercial service found itself a small niche in cargo hauling. The United States Army ordered 173 in 1959 and took delivery in 1961 under the designation AC-1, which was changed to CV-2 Caribou in 1962.

The majority of Caribou production was destined for military operators, but the type's ruggedness and excellent STOL capabilities requiring runway lengths of only 1200 feet (365 metres)[1] also appealed to some commercial users. US certification was awarded on 23 December 1960. Ansett-MAL, which operated a single example in the New Guinea highlands, and AMOCO Ecuador were early customers, as was Air America, (a CIA front in South East Asia during the Vietnam War era for covert operations). Other civil Caribou aircraft entered commercial service after being retired from their military users.

Today only a handful are in civil use.

Operational history

A C-7 Caribou painted in a USAF SEA camouflage scheme and marked as a 457th TAS transport, at Dover AFB Air Mobility Command Museum in July 2007.

In response to a US Army requirement for a tactical airlifter to supply the battlefront with troops and supplies and evacuate casualties on the return journey, de Havilland Canada designed the DHC-4. With assistance from Canada's Department of Defence Production, DHC built a prototype demonstrator that flew for the first time on 30 July 1958.

Impressed with the DHC4's STOL capabilities and potential, the US Army ordered five for evaluation as YAC-1s and went on to become the largest Caribou operator. The AC-1 designation was changed in 1962 to CV-2, and then C-7 when the US Army's CV-2s were transferred to the US Air Force in 1967. US and Australian Caribous saw extensive service during the Vietnam War.

The U.S. Army purchased 159 of the aircraft and they served their purpose well as a tactical transport during the Vietnam War, where larger cargo aircraft such as the C-123 Provider and the C-130 Hercules could not land on the shorter landing strips. The aircraft could carry 32 troops or two Jeeps or similar light vehicles. The rear loading ramp could also be used for parachute dropping (also, see Air America).

Under the Johnson-McConnell agreement of 1966, the Army relinquished the fixed wing Caribou to the United States Air Force in exchange for an end to restrictions on Army rotary wing operations. On 1 January 1967, the 17th, 57th, 61st, 92nd, 134th, and 135th Aviation Companies of the U.S. Army were inactivated and their aircraft transferred respectively to the newly-activated 537th, 535th, 536th, 459th, 457th, and 458th Troop Carrier Squadrons of the USAF. On 1 August 1967 the "troop carrier" designations were changed to "tactical airlift".

Some US Caribou were captured by North Vietnamese forces and remained in service with that country through to the late 1970s. Following the war in Vietnam, all USAF Caribous were transferred to Air Force Reserve and Air National Guard airlift units pending their replacement by the C-130 Hercules in the 1980s.

All C-7s have since been phased out of the US military, with the last example serving again under US Army control through 1985 in support of the US Army's Golden Knights parachute demonstration team. Other notable military operators included Australia, Brazil, Canada, India, Malaysia and Spain.

The Royal Australian Air Force retired its last Caribou, A4-140, on 27 November 2009.[2] The aircraft, which was manufactured in 1964, was donated to the Australian War Memorial, Canberra.[3]

Brazil's Caribous are slowly being replaced by more modern EADS CASA C-295 turboprop cargo airplanes.[citation needed]

Variants

US Army DHC-4A
DHC-4 Caribou
STOL tactical transport, utility transport aircraft.
CC-108
Royal Canadian Air Force designation for the DHC-4 Caribou.
YAC-1
This designation was given to five DHC-4 Caribous, sold to the United States Army for evaluation.
AC-1
United States Army designation for the first production run of 56 DHC-4 Caribou. Later redesignated CV-2A in 1962.
CV-2A
United States Army AC-1 redesignated in 1962.
CV-2B
This designation was given to a second production run of 103 DHC-4 Caribous, which were sold to the US Army, with reinforced internal ribbing.
C-7A/B
These designations were applied to all 144 Caribous transferred to the US Air Force by the US Army.
DHC-4A Caribou
Similar to the DHC-4, but this version had an increased takeoff weight.
DHC-4T Turbo Caribou
A conversion of the baseline DHC-4 Caribou powered by the PWC PT6A-67T turboprop engines designed, test flown and certified by the Pen Turbo Aviation company.

Operators

Military operators

 Abu Dhabi/  United Arab Emirates
RAAF DHC-4 Caribou (A4-299) from No. 38 Squadron.
 Australia
 Brazil
 Cambodia
 Canada
 Cameroon
 Costa Rica
 Ghana
 India
 Iran
  • Imperial Iranian Air Force
 Kenya
 Kuwait
 Liberia[citation needed]
  • Two refurbished aircraft were delivered to the Liberian Army's, Air Reconnaissance Unit in 1989. The aircraft were destroyed during the civil war.
RMAF Caribou on display at the Malaysian Army Museum, Port Dickson.
 Malaysia
  • Malaysian Air Force retired their Caribous from active service.[7]
 Oman
 Spain
 South Vietnam
 Sweden
 Tanzania
  • Tanzanian Air Force[9]
 Thailand
 Uganda
 United States
 Vietnam
 Zambia
  • Zambian Air Force operated four Caribou.[12]

Civil operators

 Australia
 Canada
  • La Sarre Air Services
 Costa Rica
 Ecuador
  • AMOCO Ecuador
  • Anglo-Ecuador Oilfields
  • Aerolíneas Cóndor of SA
 Gabon
  • Air Inter Gabon
 Indonesia
  • Trigana Air
 Malta
  • New Cal Aviation
 Papua New Guinea
  • Garamut Exploration Services
  • Vanimo Trading
 Taiwan
 United States

Incidents and accidents

On 27 August 1992 a Caribou which had modified to turboprop specification by NewCal Aviation crashed on takeoff at Gimli Industrial Park Airport in Gimli, Manitoba. 3 people aboard were killed.[14]

Aircraft on display

United States

C-7 on display at the museum, once used by the Golden Knights parachute team
de Havilland AC-1/C-7A, AF Serial No. 60-3767
Exhibited at Jimmy Doolittle Air & Space Museum, Travis Air Force Base, Fairfield, California
de Havilland AC-1A/C-7A, AF Serial No. 62-4188
On display at New England Air Museum, Bradley International Airport, Connecticut
de Havilland CV-2B/C-7B Caribou, AF Serial No. 63-9756
Exhibited at Museum of Aviation, Robins AFB, Georgia
de Havilland C-7A Caribou, AF Serial No. 63-9760
Exhibited at the Air Mobility Command Museum, Dover AFB, Delaware.
de Havilland C-7A Caribou, AF Serial No. 62-4193
Exhibited at the 82nd Airborne Division War Memorial Museum, Fort Bragg, North Carolina.
de Havilland C-7A Caribou, AF Serial No. 57-3083
Exhibited at the National Museum of the United States Air Force, Wright-Patterson AFB, Ohio
de Havilland CV-2B, AF Serial No. 62-4149
Exhibited at Cavanaugh Flight Museum in Dallas, Texas. (fully restored to flying condition, only one in North America)[15]

Australia

DHC-4 Caribou A4-140
Gifted to the Australian War Memorial in November 2009.[3]
DHC-4 Caribou A4-152
Gifted to the Royal Australian Air Force Museum in November 2009.[3]
DHC-4 Caribou A4-159, Nose section only.
Queensland Air Museum, Caloundra.
DHC-4 Caribou A4-173
Queensland Air Museum, Caloundra.

India

DHC-4 Caribou A4-146
Exhibited at the Indian Air Force Museum, Palam.

Malaysia

DHC-4 Caribou A4-248
Exhibited at the Royal Malaysian Air Force Museum, Sungai Besi, Kuala Lumpur.

Specifications (DHC-4A)

Data from MacDonald Aircraft Handbook.[16]

General characteristics

  • Crew: Three
  • Capacity:
    • 32 troops or
    • 24 fully equipped paratroops or
    • 14 casualty stretchers
  • Payload: 8,000 lb (3,628 kg)
  • Length: 72.58 ft (22.12 m)
  • Wingspan: 95.58 ft (29.13 m)
  • Height: 31.66 ft (9.65 m)
  • Wing area: 912 ft² (84.7 m²)
  • Empty weight: 16,920 lb (7,675 kg)
  • Loaded weight: 28,500 lb (12,927 kg)
  • Powerplant: 2 × Pratt and Whitney R-2000-7M2 Twin Wasp 14-cylinder, 1,450 hp (1,081 kW) each

Performance

See also

Related development
Aircraft of comparable role, configuration and era

References

Notes
  1. ^ "Caribou Sales Brochure – 1962" (PDF). http://www.c-7acaribou.com/history/images/Caribou_Brochure_Web.pdf. Retrieved 26 May 2011. 
  2. ^ "Defence 'workhorse' makes final flight." ABC News, 27 November 2009. Retrieved: 27 November 2009.
  3. ^ a b c Fitzgibbon, The Hon. Joel, (MP), Minister for Defence. "Honouring the Caribou's Service to Australia." Department of Defence, 9 March 2009. Retrieved: 9 March 2009.
  4. ^ "Fuerza Pública revive avión militar Caribú – SUCESOS – La Nación". Nacion.com. http://www.nacion.com/2010-07-30/Sucesos/UltimaHora/Sucesos2467068.aspx. Retrieved 26 May 2011. 
  5. ^ Andrade 1982, p. 141.
  6. ^ "',Kuwait Air Force (KAF)', entry at the ',Scramble', magazine website". Scramble.nl. http://www.scramble.nl/kw.htm. Retrieved 26 May 2011. 
  7. ^ "',Malaysian Forces Overview', entry at the ',Scramble', magazine website". Scramble.nl. http://www.scramble.nl/my.htm. Retrieved 26 May 2011. 
  8. ^ "',Royal Air Force of Oman', entry at the ',Scramble', magazine website". Scramble.nl. http://www.scramble.nl/om.htm. Retrieved 26 May 2011. 
  9. ^ a b Wayne Buser (4 September 2010). "',Caribou Roster',". Dhc4and5.org. http://www.dhc4and5.org/Roster.html. Retrieved 26 May 2011. 
  10. ^ Royal Thai Police
  11. ^ Andrade 1982, p. 231.
  12. ^ Taylor 1971, p. 19.
  13. ^ "Serial MSP002 C-7A MSN 149". Scramble.nl. http://www.scramble.nl/crbase.htm. Retrieved 26 May 2011. 
  14. ^ "ASN Aircraft accident de Havilland Canada DHC-4T Caribou N400NC Gimli, MB:". Aviation Safety Network. http://aviation-safety.net/database/record.php?id=19920827-1. Retrieved 28 March 2011. 
  15. ^ "De Havilland CV-2B Caribou". Cavanaugh Flight Museum. 20 June 1963. http://www.cavanaughflightmuseum.com/CV-2B.html. Retrieved 26 May 2011. 
  16. ^ Green 1964, p. 249.
Bibliography

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