1. Design and development

2. Variants
    Civil variants  Military variants 

3. Special mission variants

4. Operators
    Military and government operators 

5. Accidents and incidents

6. Specifications (Gulfstream III)

7. See also

8. References

9. External links

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 {{convert|6|ft|m|1|abbr=on}} more span and {{convert|5|ft|m|1|abbr=on}} winglets added, the leading edge is longer and its contour is modified. The fuselage is {{convert|2|ft|m|1|abbr=on}} longer aft of the main door, the radome is extended and there is a new curved windshield. Maximum takeoff weight is increased to {{convert|68200|lb|kg|0|abbr=on}} or {{convert|69700|lb|kg|0|abbr=on}} 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.

By 2018, prices for a used 1982 GIII started at $695,000.^[4]

Variants

Civil variants

• 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

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

A NASA Gulfstream III (N992NA cn 309) has also been fitted with a centerline pylon to allow it to carry the Airborne Microwave Observatory of Subcanopy and Subsurface (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]

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

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

{{DZA}}

{{CMR}}

• Cameroon Air Force (phased out)

{{CIV}}

{{DEN}}

• Royal Danish Air Force^[20]

{{GAB}}

{{GHA}}

• Ghana Air Force

{{ITA}}

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

{{IND}}

• Indian Air Force

{{IRL}}

• Irish Air Corps - leased aircraft

{{MEX}}

• Mexican Air Force - (former operator)

{{MAR}}

• Royal Moroccan Air Force

{{OMA}}

{{KSA}}

{{TOG}}

{{UGA}}

• Ugandan Air Force

{{USA}}

• United States Air Force
• United States Navy
• United States Army
• United States Coast Guard
• National Aeronautics and Space Administration

{{VEN}}

• Venezuelan Air Force

{{ZIM}}

• 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.
• July 4, 2017 - On the outskirts of Margarita Island, a Gulfstream III YV-2896^[22] of the Venezuelan Vice-Presidency crashed into the sea with nine people on board. Two bodies were later recovered, with the remaining seven occupants believed to have been killed.^[23]

Specifications (Gulfstream III)

|crew=two or three
|capacity=19 passengers (standard seating)
|length main=83 ft 1 in
|length alt=25.32 m
|span main=77 ft 10 in
|span alt=23.72 m
|height main=24 ft 4½ in
|height alt=7.43 m
|area main=934.6 sq ft
|area alt=86.83 m²
|aspect ratio=6.0:1
|airfoil=
|empty weight main=38,000 lb
|empty weight alt=17,236 kg
|loaded weight main=
|loaded weight alt=
|useful load main=
|useful load alt=
|max takeoff weight main=69,700 lb
|max takeoff weight alt=31,615 kg
|more general=
|engine (jet)=Rolls-Royce Spey RB.163 Mk 511-8
|type of jet=Turbofan
|number of jets=2
|thrust main=11,400 lbf
|thrust alt=50.7 kN
|thrust original=

|max speed main=576 mph
|max speed alt=501 knots, 928 km/h
|max speed more=(max cruise)
|cruise speed main=508 mph
|cruise speed alt=442 knots, 818 km/h
|cruise speed more=(long range cruise)
|never exceed speed main=
|never exceed speed alt=
|stall speed main= 121 mph
|stall speed alt=105 knots, 194 km/h
|range main= 4,200 mi
|range alt=3,650 nmi, 6,760 km
|range more=(eight passengers, IFR reserves)
|ceiling main=45,000 ft
|ceiling alt=13,716 m
|climb rate main=3,800 ft/min
|climb rate alt=19.3 m/s
|loading main=
|loading alt=
|thrust/weight=
|power/mass main=
|power/mass alt=
|more performance=
|armament=
|avionics=
}}

See also

• Grumman Gulfstream II
• Gulfstream IV/G400/G450

• List of active United States military aircraft

References

Notes

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

• {{commons category-inline|Gulfstream III}}

• TM4SF5
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• TMA award
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