Grumman F-9 Cougar

The Grumman F9F/F-9 Cougar was an aircraft carrier-based fighter aircraft for the United States Navy. Based on Grumman's earlier F9F Panther, the Cougar replaced the Panther's straight wing with a more modern swept wing. The Navy considered the Cougar an updated version of the Panther, despite having a different official name, and thus Cougars started off from F9F-6 upward.


Grumman F-9 Cougar
Class Aircraft
Type Fighter
Manufacturer Grumman
Origin United States of America
Country Name Origin Year
United States of America 1951
Country Name Operational Year Retirement Year
Argentina View
United States of America 1951 1974 View
ManufacturerName Production From Production To Quantity
Grumman 1392 View

Prototypes were quickly produced by modifying Panthers, and the first (XF9F-6) flew on 20 September 1951. The aircraft was still subsonic, but the critical Mach number was increased from 0.79 to 0.86 at sea level and to 0.895 at 35,000 ft (10,000 m), improving performance markedly over the Panther. The Cougar was too late for Korean War service, however, and thus combat effectiveness estimates of the Cougar against potential foes such as the (likewise subsonic, but not carrier-rated) Soviet Mikoyan-Gurevich MiG-15 necessarily remain in the sphere of conjecture.

Initial production (646 airframes) was the F9F-6, delivered from mid-1952 through July 1954. Armament was four 20 mm (.79 in) M2 cannons in the nose and provision for two 1,000 lb (450 kg) bombs or 150 US gal (570 l) drop tanks under the wings. Most were fitted with a UHF homing antenna under the nose, and some were fitted with probes for inflight refuelling. Later redesignated F-9F in 1962. Sixty were built as F9F-6P reconnaissance aircraft with cameras instead of the nose cannon.

This is one of a small percentage of aircraft that does not have ailerons; it uses spoilers for roll control.

After withdrawal from active service, many F9F-6s were used as unmanned drones for combat training, designated F9F-6K, or as drone directors, designated F9F-6D. The F9F-6K and the F9F-6D were redesignated the QF-9F and DF-9F, respectively.

F9F-7 referred to the next batch of Cougars that were given the Allison J33 engine instead of the Pratt & Whitney J48, a licensed-built Rolls-Royce Tay. A total of 168 were built, but the J33 proved both less powerful and less reliable than the J48. Almost all were converted to take J48s, and were thus indistinguishable from F9F-6s. These were redesignated F-9H in 1962.

The F9F-8 was the final fighter version. It featured an 8 in (20 cm) stretch in the fuselage and modified wings with greater chord and wing area, to improve low-speed, high angle of attack flying and to give more room for fuel tanks. 601 aircraft were delivered between April 1954 and March 1957; most were given inflight refuelling probes, and late production were given the ability to carry four AIM-9 Sidewinder air-to-air missiles under the wings. Most earlier aircraft were modified to this configuration. A number were given nuclear bombing equipment. These were redesignated F-9J in 1962.

The F9F-8B aircraft were F9F-8s converted into single-seat attack-fighters, later redesignated AF-9J.

A total of 110 F9F-8Ps were produced with an extensively modified nose carrying cameras. They were withdrawn after 1960 to reserve squadrons. In 1962, surviving F9F-6P and F9F-8P aircraft were re-designated RF-9F and RF-9J respectively.

Modifications of F9F-8 to convert to F9F-8P:

  • The modification to eliminate the guns and related equipment and incorporate the photographic equipment and automatic pilot and their controls and instruments has resulted in the following changes:
  • Rearrangement of electronics equipment installed in the area enclosed by the fuselage nose section, lengthening of this section by 12 inches, and shortening of the sliding nose section.
  • Rearrangement of the left and right consoles and the main instrument panel to provide space for the controls associated with the additional equipment.
  • Some minor changes of the fuselage structure and equipment installations to provide for the necessary ducting control for hot air from the engine compressor, which is used for defrosting the camera windows and heating the camera compartment.
  • Removal of all armament and the Armament Control System, removal of AN/APG-30 system and installation of an additional armor plate bulkhead.

The Navy acquired 377 two-seat F9F-8T trainers between 1956 and 1960. They were used for advanced training, weapons training and carrier training, and served until 1974. They were armed with twin 20 mm (.79 in) cannon and could carry a full bombs or missiles load. In the 1962 redesignation, these were called TF-9J.

United States

F9F-8s were withdrawn from front-line service in 1958–59, replaced by F11F Tigers and F8U Crusaders. The Naval Reserves used them until the mid-1960s, but none of the single-seat versions were used in the Vietnam War.

The only version of the Cougar to see combat was the TF-9J trainer (until 1962, F9F-8T). Detachments of four Cougars served with US Marines Headquarters and Maintenance Squadrons H&MS-11 at Da Nang and H&MS-13 at Chu Lai, where they were used for fast-Forward Air Control and the airborne command role, directing airstrikes against enemy positions in South Vietnam during 1966 and 1968. The TF-9J had a long service with the U.S. Navy, but the proposed Cougar modification (reengined with a J52 engine) was rejected, and the Navy selected the TA-4F Skyhawk. The last Cougar was phased out when VT-4 re-equipped on February 1974. A F9F-8T, BuNo 14276, is displayed at the National Museum of Naval Aviation, Pensacola.

Argentina

The only foreign air arm to use the F9F Cougar was the Argentine Naval Aviation, who used the F9F Panther as well. Two F9F-8T trainers were acquired in 1962, and served until 1971. The Cougar was the first jet to break the sound barrier in Argentina.[5] One aircraft (serial 3-A-151) is on display at the Naval Aviation Museum (MUAN) at Bahía Blanca, while the other was sold to an owner in United States.

Role Fighter aircraft
National origin United States
Manufacturer Grumman
First flight 20 September 1951
Retired 1974, US Navy
Status Retired
Primary users United States Navy
United States Marine Corps
Argentine Navy
Number built 1392
Developed from Grumman F9F Panther


General characteristics

  • Crew: 1
  • Length: 42 ft 1½ in (12.85 m)
  • Wingspan: 34 ft 6 in (10.51 m)
  • Height: 12 ft 3 in (3.73 m)
  • Wing area: 337 ft² (31.3 m²)
  • Empty weight: 11,866 lb (5,382 kg)
  • Loaded weight: 20,098 lb (9,116 kg)
  • Max. takeoff weight: 24,763 lb (11,232 kg)
  • Powerplant: 1 × Pratt & Whitney J48-P-8A turbojet, 8,500 lbf (38 kN) with water injection

Performance

  • Maximum speed: 647 mph (562 knots, 1,041 km/h) at 2,000 ft (610 m)
  • Range: 1,050 mi (913 nmi, 1,690 km)
  • Service ceiling: 42,000 ft (12,800 m)
  • Rate of climb: 5,750 ft/min (29.2 m/s)

Armament

  • Guns: 4 × 20 mm (0.79 in) M3 cannon, 190 rounds per gun
  • Rockets: 6 × 5 in (127 mm) rockets
  • Missiles: 4× AIM-9 Sidewinder air-to-air missiles
  • Bombs: 2 × 1,000 lb (454 kg) bombs

End notes