Grumman C-1 Trader


The Grumman C-1 Trader (TF prior to 1962) is a carrier onboard delivery (COD) variant of the Grumman S-2 Tracker. It was replaced by a similar version of the Northrop Grumman E-2 Hawkeye, the Grumman C-2 Greyhound.

C-1 (TF) Trader
Grumman C-1 flying side view.jpg
A C-1A Trader from Naval Air Station, Willow Grove, Pennsylvania in 1987
Role Carrier onboard delivery
National origin United States
Manufacturer Grumman
First flight 19 January 1955
Introduction 1956
Retired 1988
Primary user United States Navy
Number built 87
Developed from Grumman S-2 Tracker
Developed into Grumman E-1 Tracer

Design and developmentEdit

The C-1 Trader grew out of a need by the United States Navy for a new anti-submarine airplane. In response to this Grumman began development on a prototype twin-engine, high-wing aircraft which it designated the G-89. In 1952 the Navy designated this aircraft the XS2F-1 and flew it for the first time on December 4 that year. During the rest of the 1950s three major variants emerged, the C-1 Trader being one of them. The C-1 (originally the TF-1, for "Trainer", a secondary role)[1] was outfitted to carry nine passengers or 3,500 pounds (1,600 kg) of cargo and first flew in January 1955.

Operational historyEdit

Throughout the 1960s and 1970s the C-1 Trader carried mail and supplies to aircraft carriers on station in the Pacific Ocean during the Vietnam War and also served as a trainer for all-weather carrier operations. Over its production life 87 C-1 Traders were built, of which four were converted into EC-1A Tracer electronic countermeasures aircraft.[2] The last C-1 was retired from USN service in 1988; it was the second-to-last radial-engine aircraft in U.S military service (The last C-131 wasn't retired until 1990). As of 2010, approximately ten were still airworthy in civil hands, operating as warbirds.[citation needed]

In 1956 the U.S. Marine Corps Test Unit Number 1 (MCTU #1) tested the concept of using the TF-1 variant as a vehicle for inserting reconnaissance teams behind enemy lines. “On 9 July 1956 MCTU Recon Marines became the first to parachute from a TF-1. Less than three weeks later, four recon parachutists launched from the USS Bennington, which was 70 miles at sea, and jumped on a desert drop zone near El Centro California, some 100 miles inland. For the first time in Marine Corps and Naval Aviation history, the technique of introducing recon personnel off a carrier sea base to an inland objective had successfully been tested.”[3]

In August 2010, Brazilian Naval Aviation announced that it would buy and modernize eight C-1 airframes to serve in carrier onboard delivery (COD) and aerial refueling roles for use on its aircraft carrier São Paulo.[4] In 2011 contract was signed with Marsh Aviation to convert four ex-US Navy C-1A Trader airframes into KC-2 Turbo Traders.[5] The first KC-2 prototype flight was expected for November 2017 and the delivery of the first operational aircraft was scheduled for December 2018.[citation needed]


Grumman C-1 at Willow Grove
C-1A on board USS Coral Sea
Carrier Onboard Delivery version of the S-2 Tracker with enlarged fuselage for nine passengers, redesignated C-1A in 1962, 87 built.
Electronic Countermeasures conversion of the TF-1, redesignated EC-1A in 1962, four conversions.
Airborne Early Warning project that was developed in the WF-2 Tracer.
TF-1 redesignated in 1962.
TF-1Q redesignated in 1962.
KC-2 Turbo Trader
Marsh Aviation modernization project for Air-to-Air Refueling, requested for the Brazilian Navy.[6]
proposed 10-12 seat passenger variant
proposed tanker variant


  United States
  Brazil (Retired)

Surviving aircraftEdit

On display

Specifications (C-1A)Edit

Data from Grumman aircraft since 1929.[23]

General characteristics

  • Crew: 1
  • Capacity: 9 pax / 8,500 lb (3,856 kg) payload
  • Length: 42 ft (13 m)
  • Wingspan: 69 ft 8 in (21.23 m)
  • Height: 16 ft 3.5 in (4.966 m)
  • Wing area: 485 sq ft (45.1 m2)
  • Airfoil: root: NACA 63A420; tip: NACA 63A415[24]
  • Empty weight: 16,631 lb (7,544 kg)
  • Gross weight: 23,031 lb (10,447 kg)
  • Max takeoff weight: 24,600 lb (11,158 kg)
  • Powerplant: 2 × Wright R-1820-82WA Cyclone 9-cylinder air-cooled radial piston engines, 1,525 hp (1,137 kW) each
  • Propellers: 3-bladed constant-speed fully-feathering reversible-pitch propellers


  • Maximum speed: 280 mph (450 km/h, 240 kn) at 4,000 ft (1,219 m)
  • Cruise speed: 167 mph (269 km/h, 145 kn)
  • Range: 1,110 mi (1,790 km, 960 nmi)
  • Service ceiling: 24,800 ft (7,600 m)
  • Rate of climb: 1,950 ft/min (9.9 m/s)
  • Wing loading: 47.5 lb/sq ft (232 kg/m2)
  • Power/mass: 0.1315 hp/lb (0.2162 kW/kg)

See alsoEdit

Related development

Aircraft of comparable role, configuration, and era


  1. ^ Bishop, Chris; Chant, Chris (2004). Aircraft Carriers. London: Summertime Publishing Ltd. p. 168. ISBN 0-7603-2005-5.
  2. ^ Donald, David; Daniel J. March (2001). Carrier Aviation Air Power Directory. Norwalk, CT: AIRtime Publishing. ISBN 1-880588-43-9.
  3. ^ Lanning and Stubbe, Michael, Ray (1989). Inside Force Recon. Ivy Books. p. 34. ISBN -08041-0301-1.
  4. ^ "Brazilian navy buys Traders".
  5. ^ "Brazilian Navy restarts KC-2 Turbo Trader contract".
  6. ^ "Brazilian Traders set for modernisation" Fight Global, 14 Dec 2011 Retrieved: 23 December 2011
  7. ^ "Grumman C-1 Trader/136752." Lauridsen Aviation Museum. Retrieved: 6 August 2021.
  8. ^ "FAA Registry/N71456." Retrieved: 6 August 2021.
  9. ^ "FAA Registry/N6193Z." Retrieved: 6 August 2021.
  10. ^ "FAA Registry/N6193N." Retrieved: 6 August 2021.
  11. ^ "Grumman C-1 Trader/136778." Champaign Aviation Museum. Retrieved: 6 August 2021.
  12. ^ "FAA Registry/N778SR." Retrieved: 6 August 2021.
  13. ^ "Grumman C-1A Trader/136781." Pacific Coast Air Museum. Retrieved: 6 August 2021.
  14. ^ "FAA Registry/N475AM." Retrieved: 6 August 2021.
  15. ^ "FAA Registry/N927BN." Retrieved: 6 August 2021.
  16. ^ "FAA Registry/N189G." Retrieved: 6 August 2021.
  17. ^ "FAA Registry/N7171M." Retrieved: 6 August 2021.
  18. ^ "FAA Registry/N81193." Retrieved: 6 August 2021.
  19. ^ "Grumman C-1A Trader/136754." National Naval Aviation Museum. Retrieved: 27 April 2016.
  20. ^ "Grumman C-1A Trader/136790." Grissom Air Museum. Retrieved: 27 April 2016.
  21. ^ "Grumman C-1A Trader/146034." Wings of Freedom Museum. Retrieved: 27 April 2016.
  22. ^ "Grumman C-1A Trader/146036." USS Midway Museum. Retrieved: 27 April 2016.
  23. ^ Francillon, René Jacquet (1989). Grumman aircraft since 1929 (1st ed.). London: Putnam. pp. 387–393. ISBN 0851778356.
  24. ^ Lednicer, David. "The Incomplete Guide to Airfoil Usage". Retrieved 16 April 2019.

External linksEdit

  Media related to Grumman C-1 Trader at Wikimedia Commons