Gulfstream III

Gulfstream III

C-20 Gulfstream III operated by the United States Navy
Role	Business jet
Manufacturer	Gulfstream Aerospace
First flight	2 December 1979^[1]
Introduction	1980
Primary users	United States Gabon India Italy
Produced	1979–1986
Number built	202
Unit cost	US$37M
Developed from	Grumman Gulfstream II
Variants	Gulfstream IV/G400/G450

The Gulfstream III, a business jet produced by Gulfstream Aerospace, is an improved variant of the Grumman Gulfstream II.

Design and development

The Gulfstream III was built at Savannah, Georgia in the United States and was designed as an improved variant of the Grumman Gulfstream II. Design studies were performed by Grumman Aerospace Corporation in collaboration with Gulfstream American Corporation. Design of the Gulfstream III started with an effort to synthesize a completely new wing employing NASA supercritical airfoil sections and winglets. Optimization studies considering weight, drag, fuel volume, cost, and performance indicated that a substantial portion of the new wing benefit could be secured with modifications to the existing wing. As a result, the new wing concept was canceled and work began on design modifications that would retain the Gulfstream II wing box structure and trailing edge surfaces.^[2]

Compared to the G-1159 Gulfstream II, the wing has 6 ft (1.8 m) more span and 5 ft (1.5 m) winglets added, the leading edge is longer and its contour is modified. The fuselage is 2 ft (0.6 m) longer aft of the main door, the radome is extended and there is a new curved windshield. Maximum takeoff weight is increased to 68,200 lb (30,935 kg) or 69,700 lb (31,615 kg) and there are various changes to the autopilot, flight instruments, and engine instruments. The aircraft received its type certificate from the American Federal Aviation Administration on 22 September 1980.^[3] A total of 202 Gulfstream IIIs were built, with the last example built in 1986.^[4]

In 2013, the FAA modified 14 CFR part 91 rules to prohibit the operation of jets weighing 75,000 pounds or less that are not stage 3 noise compliant after December 31, 2015. The Gulfstream III is listed explicitly in Federal Register 78 FR 39576. Any Gulfstream III's that have not been modified by installing Stage 3 noise compliant engines or have not had "hushkits" installed for non-compliant engines will not be permitted to fly in the contiguous 48 states after December 31, 2015. 14 CFR §91.883 Special flight authorizations for jet airplanes weighing 75,000 pounds or less - lists special flight authorizations that may be granted for operation after December 31, 2015.

Variants

Civil variants

Gulfstream III in 1981

Model G-1159A Gulfstream III - Two or three-crew executive, corporate transport aircraft, powered by two Rolls-Royce Spey turbofan engines.

Military variants

C-20A - United States Air Force variant configured for 14 passengers and five crew; phased out of USAF service in 2002, one example transferred to NASA for use at the Neil A. Armstrong Flight Research Center at Edwards Air Force Base as a test aircraft.^[5]^[6]^[7]
C-20B - United States Air Force and United States Coast Guard variant with upgraded electronics, used for Operational Support Airlift (OSA) and Special Assignment Airlift Missions (SAAM); the single Coast Guard C-20B was used by the Commandant of the Coast Guard and other senior USCG officials as well as the Secretary of Homeland Security.^[5]
C-20C - United States Air Force C-20B with upgraded and "hardened" secure communications, often utilized as backup aircraft accompanying the VC-25A aircraft when it is operating as Air Force One^[5]
C-20D - United States Navy Operational Support Airlift (OSA) aircraft with modified communications equipment for use by the Navy, normally in support of high-ranking naval officials^[5]
C-20E - Stretched fuselage/redesigned wing variant for use by the United States Army as an Operational Support Airlift (OSA) aircraft^[5]^[8]
Gulfstream III SRA-1 - Special reconnaissance and surveillance version for export.
Gulfstream III SMA-3 - Export model for Denmark, fitted with a Texas Instruments APS-127 search radar. Three maritime reconnaissance and patrol, fisheries protection, search and rescue, and VIP transport aircraft were built for the Royal Danish Air Force in 1983. No longer in service.

NOTE: United States Army C-20F and C-20J, United States Navy/United States Marine Corps C-20G, and United States Air Force C-20H aircraft are all Gulfstream IV variants

Special Mission Variants

Detail of the custom right cargo door of the Royal Danish Air Force SMA-3's and similar to those found on US military C-20 variants

A NASA Gulfstream C-20B (83-0502 cn 389) has been fitted with a centerline pylon to allow it to carry the UAVSAR pod.^[9]

A NASA Gulfstream III (N992NA cn 309) has also been fitted with a centerline pylon to allow it to carry the AIRMOSS pod, a modification of the UAVSAR pod.^[10]

The Phoenix Air Group operates two former Royal Danish Air Force SMA-3 aircraft (N173PA cn 313, N163PA cn 249) and a Gulfstream III (N186PA cn 317).^[11] One aircraft provides airborne maritime range surveillance for the Missile Defense Agency (MDA) and other Department of Defense range facilities using a high definition Texas Instruments APS-127 Surface Search Radar system.^[12] All three are configured with a large cargo door. In 2008 Phoenix Air developed an Airborne Biomedical Containment System with the CDC. In 2014, the system was deployed during the Ebola virus epidemic in Liberia to fly 12 ebola missions to the United States.^[13]

N30LX (cn 438) has been modified by the addition of a ventral canoe and sensor turret as the "Dragon Star" Airborne Multi-Intelligence Laboratory for use by Lockheed Martin.^[14] This has been leased by Italy since 2012.^[15]

Calspan operates N710CF (cn 448), which has been modified as an airborne test bed. Modifications include a centerline pylon ^[16] and a dorsal satcom radome ^[17]

Two Gulfstream IIIs, K2961 (cn 494) and K2962 (cn 495), equipped with long-range oblique photography cameras mounted in the fuselage, were delivered to the Indian Air Force.^[18]^[19]

Operators

Military and government operators

Cockpit of a C-20A

Military and government operators of the Gulfstream III and C-20 include:

Algeria
Cameroon

Cameroon Air Force (phased out)

Ivory Coast
Denmark

Royal Danish Air Force^[20]

Gabon
Ghana

Ghana Air Force

Italy

Italian Air Force operated two Gulfstream III from 1985 until 2003.^[21]

India

Indian Air Force

Ireland

Irish Air Corps - leased aircraft

Mexico

Mexican Air Force - (former operator)

Morocco

Royal Moroccan Air Force

Oman
Saudi Arabia
Togo
Uganda

Ugandan Air Force

United States

Venezuela

Venezuelan Air Force

Zimbabwe

Air Force of Zimbabwe

Accidents and incidents

August 3, 1996 - Flew into mountain during final approach to Vagar Airport on Faroe Islands. The Gulfstream III (F-330) from RDAF - Royal Danish Air Force was destroyed killing all nine people on board, including the Danish Chief of Defence Jørgen Garde.
March 29, 2001 - While trying to land at Aspen-Pitkin County Airport, an Avjet Gulfstream III crashed into a hill, killing all 18 people on board.

Specifications (Gulfstream III)

Data from Jane's Civil and Military Aircraft Upgrades 1994–95^[4]

General characteristics

Crew: two or three
Capacity: 19 passengers (standard seating)
Length: 83 ft 1 in (25.32 m)
Wingspan: 77 ft 10 in (23.72 m)
Height: 24 ft 4½ in (7.43 m)
Wing area: 934.6 sq ft (86.83 m²)
Aspect ratio: 6.0:1
Empty weight: 38,000 lb (17,236 kg)
Max. takeoff weight: 69,700 lb (31,615 kg)
Powerplant: 2 × Rolls-Royce Spey RB.163 Mk 511-8 Turbofan, 11,400 lbf (50.7 kN) each

Performance

Maximum speed: 576 mph (501 knots, 928 km/h) (max cruise)
Cruise speed: 508 mph (442 knots, 818 km/h) (long range cruise)
Stall speed: 121 mph (105 knots, 194 km/h)
Range: 4,200 mi (3,650 nmi, 6,760 km) (eight passengers, IFR reserves)
Service ceiling: 45,000 ft (13,716 m)
Rate of climb: 3,800 ft/min (19.3 m/s)

References

Notes

↑ Taylor 1982, pp. 383–384.
↑ Boppe, Charles W., "Computational Aerodynamic Design: X-29, the Gulfstream Series and a Tactical Fighter", SAE paper 851789, 1985 Wright Brothers Award Paper, presented at the Aerospace Technology Conference & Exposition, Long Beach California, October 1985.
↑ "Type Certificate date Sheet NO. A12EA, revision 46" (PDF). FAA. February 22, 2016.
1 2 Michell 1994, p. 313.
1 2 3 4 5 Model Designation of Military Aerospace Vehicles, DoD 4120.15L, 2004-05-12
↑ http://www.af.mil/information/factsheets/factsheet.asp?id=87
↑ http://www.dfrc.nasa.gov/gallery/Photo/C-20A/HTML/EC02-0221-6.html
↑ The United States Military Aviation Directory, AIRTime Publishing, Norwalk, CT, c2000, ISBN 978-1-880588-29-1
↑ G-III UAVSAR Retrieved 31 July 2011.
↑ UAVSAR Installed on JSC G-III for AirMOSS Study Retrieved 13 March 2014.
↑ Full Details of Active Gulfstream IIIs Retrieved 31 July 2011.
↑ 'Military Ops Range Clearing' Retrieved 31 July 2011.
↑ Thomas A Horne (January 2015). "Mike Ott The Inside Story of a Ebola Evacuation Mission". AOPA Pilot: T-14.
↑
Enter The Dragon Retrieved 31 July 2011.
↑ Kington, Tom (11 July 2015). "Italy Renews Lease on SIGINT Aircraft". www.defensenews.com. TEGNA. Retrieved 13 July 2015.
↑ Flight testing N710CF with Centerline Pylon Capable of Carrying External Stores] Retrieved 22 August 2014.
↑ sensors airborne services-test-beds/ N710CF with Common Systems Radome on upper fuselage for SATCOM antenna testing] Retrieved 22 August 2014.
↑ Picture of the Gulfstream Aerospace G-1159A Gulfstream III aircraft Retrieved 31 July 2011.
↑ Picture of the Gulfstream Aerospace G-1159A Gulfstream III aircraft Retrieved 31 July 2011.
↑ Schrøder, Hans (1991). "Royal Danish Airforce". Ed. Kay S. Nielsen. Tøjhusmuseet, 1991, p. 1–64. ISBN 87-89022-24-6.
↑ "Italian Air Force Aircraft Types". aeroflight.co.uk. Retrieved 17 December 2015.

Bibliography

Michell, Simon. Jane's Civil and Military Aircraft Upgrades 1994–95. Coulsdon, UK:Jane's Information Group, 1994. ISBN 0-7106-1208-7.
Taylor, John W. R. (editor). Jane's All The World's Aircraft 1982–83. London:Jane's Yearbooks, 1982. ISBN 0-7106-0748-2.

External links

Media related to Gulfstream III at Wikimedia Commons

United States military transport aircraft designations, Army/Air Force and Tri-Service systems

Army/Air Force sequence (1925-1962)	C-1 C-2 C-3 C-4 C-5 C-6 C-7 C-8 C-9 C-10 C-11 C-12 C-13¹ C-14 C-15 C-16 C-17 C-18 C-19 C-20 C-21 C-22 C-23 C-24 C-25 C-26 C-27 C-28 C-29 C-30 C-31 C-32 C-33 C-34 C-35 C-36 C-37 C-38 C-39 C-40 C-41/A C-42 C-43 C-44 C-45 C-46 C-47/T C-48 C-49 C-50 C-51 C-52 C-53 C-54 C-55 C-56 C-57 C-58 C-59 C-60 C-61 C-62 C-63 C-64 C-65 C-66 C-67 C-68 C-69 C-70/A/B/C/D C-71 C-72 C-73 C-74 C-75 C-76 C-77/B-D C-78 C-79 C-80 C-81 C-82 C-83 C-84 C-85 C-86 C-87 C-88 C-89 C-90 C-91 C-92 C-93 C-94 C-95 C-96 C-97/KC-97 C-98 C-99 C-100 C-101 C-102 C-103 C-104 C-105 C-106 C-107 C-108 C-109 C-110 C-111 C-112 C-113 C-114 C-115 C-116 C-117 C-118 C-119 C-120 C-121/F C-122 C-123/A C-124 C-125 C-126 C-127 (I) C-127 (II) C-128 C-129 C-130/J C-131 C-132 C-133 C-134 C-135/KC-135 C-136 C-137 C-138¹ C-139¹ C-140 C-141 C-142

Tri-service sequence (1962-present)	C-1 C-2 C-3 C-4 C-5 C-6 C-7/B C-8 C-9 C-10 C-11 C-12 C-13¹ C-14 C-15 C-16¹ C-17 C-18 C-19 C-20A-D/F-H C-21 C-22 C-23 C-24 C-25 C-26 C-27/J C-28 C-29 C-30¹ C-31 C-32 C-33 C-34¹ C-35 C-36 C-37A/B C-38 C-39¹ C-40 C-41 C-42¹ C-43¹ C-44¹ C-45 C-46

Revived original sequence (2005-present)	C-143 C-144 C-145 C-146

Non-sequential designations	C-767 C-880

¹ Not assigned See also: AC-47 • AC-119 • AC-130 • DC-130 • EC-130 • HC-130 • KC-130 • LC-130 • MC-130 • WC-130 • CT-39 • CT-43

Gulfstream aircraft

Grumman	G-I G-II

American Jet Industries/ Gulfstream American	Hustler Peregrine 600 Peregrine

Gulfstream	G-III G-IV G-V Jetprop 840 Jetprop 900 Jetprop 980 Jetprop 1000 Jetprop 1200 Peregrine 600 Peregrine G100/G150 G200 G280 G300/G350/G400/G450 G550 G500/G600 G650

Military versions	C-4 C-11 C-20 C-20F/G/H C-37A C-37B C-38A X-54

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