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North American T-28D Trojan     ( BJF.13 )
1962 - 1984

The Royal Thai Air Force received forty North American T-28D Trojan armed trainers from the United States, designated Trainer Type 13. Since the T-28 had been used as attacker, its name was thus changed to Attacker / Trainer Type 13. An additional eighty T-28Ds were also acquired during 1964-1975.
Type: piston-engined trainer and COIN aircraft
Accommodation: two pilots seated in tandem
Service in RTAF: 1962 - 1984


T-28D Trojan No. 112/15, Sel. No. 54-137802 at the front of Wing 46, Phitsanulok Province

The T-28 was built by North American to fulfil am Army Air Force requcst for a training aircraft to replace the T-6 Texan, which had been used in the tuitional role for almost a decade. The resulting design featured a tricycle undercarriaqe, large frameless canopy and a powerful wright R-1300 radial engine, which gave the Trojan (as it was named) a top speed in excess of 280 mph. Some 1194 T-28As were duly procured and the type was also adopted by the US Navy/Marine Corps. The latter services reengined their Trojans with more powerful 1425 hp R-1820-86 Cyclones, which drove a three-bladed propeller as opposed the T-28A's 'two-blader'. Designated the T-28B, 489 were acquired, followed by 299 carrier-capable C-models. Foreign sales were also achieved in substantial numbers, with the French purchasing over 250 aircraft. In 1960 the USAF expressed an interest in acquiring an armed counter-insurgency (COIN) variant of the T-28 for use in the close-support role, and several hundred surplus T-28As were so modified by North American amd Fairchild in to AT-28D Nomads. These aircraft featured the R-1820 engine and three-bladed propeller, armour protection for the crew amd six underwing hardpoints. Sud Aviation in France carried out a similar conversion on Armee de I'Air T-28As, the resulting aircraft being renamed the Fennec. Both types would see much action in South-East Asia and North Africa respectively, and today only a handful remain in service.


North American T-28 Trojan/Fennec   USA and France

Dimensions :
Length:
Wingspan:
Height:

32 ft 10 in (10 m)
40 ft 0 in (12.19 m)
12 ft 8 in (8.36 m)


Weights :
Empty:
Max T/O:

7,750 lb (3,515 kg)
15,600 lb (7075 kg)


Performance :
Max Speed:
Range:
Powerplant:
Output:

360 mph (580 kmh)
2,760 miles (4,440 km) ferry range
Wright R-1300-1 (T-28A) or R-1820-86 Cyclone (T-28D)
800 hp (596 kW) and 1425 hp (1062 kW) respectively


First Flight Date: 26 September 1949


Surviving Airworthy Variant(s):

R-28A, GT-28A, T-28A Fennec, T-28B, T-28C, AT-28D and T-28R-2 Nomair

Jane's Historic Military Aircraft Recognition Giude, 1998, Page 376.


( T-28 D )  TROJAN





 T - 28 D

T - 28 D


NORTH AMERICAN T-28A "TROJAN"

The first T-28 made its initial flight on September 24, 1949. Designed as a replacement for the T-6 trainer, the "Trojan" went into production in 1950. The USAF version (T-28A) was powered by an 800-hp. engine, whereas later U.S. Navy versions (T-28B and C) were powered by 1,425-hp. engines. When production ended in 1957, a total of 1,948 of the three different versions had been built.

In 1962, the USAF began a program to modify more than 200 T-28s as tactical fighter-bombers for counterinsurgency warfare in Vietnam. Equipped with 1,425-hp. engines, these airplanes (redesignated the T-28D "Nomad") proved to be an effective weapon in close air support missions against enemy troops inside South Vietnam.

The T-28A on display was transferred to the U.S. Air Force Museum in September 1965.

SPECIFICATIONS
Span: 40 ft. 7 in.
Length: 32 ft.
Height: 12 ft. 8 in.
Weight: 7,812 lbs. without external load
Armament: Two .50-cal. machine guns in detachable pods under wing, two 100-lb. bombs, or six 2.25 in. rockets
Engine: Wright R-1300 of 800 hp.
Cost: $123,000
Serial Number: 49-1494
C/N: 159-6

PERFORMANCE
Maximum speed: 283 mph.
Cruising speed: 190 mph.
Range: 1,000 miles
Service Ceiling: 25,200 ft.


NORTH AMERICAN T-28B "TROJAN"

North American T-28B Trojan

The T-28 was originally designed to replace the T-6 trainer. It was first flown on September 24, 1949, and entered production in 1950. The U.S. Air Force version (T-28A) was powered by an 800 hp. engine, whereas the later U.S. Navy versions (T-28B and -C) were powered by a 1,425 hp. engine. When production ended in 1957, a total of 1,948 of these three versions had been built. A few Navy T-28Bs eventually went into the Air Force inventory and a few others were turned over to the U.S. Army.

In 1962, the Air Force began a program to modify more than 200 T-28As as T-28D "Nomad" tactical fighter-bombers for counter-insurgency warfare in Vietnam. Equipped with the larger 1,425 hp. engines and many other changes, the T-28Ds eventually proved to be an effective close air support weapon against enemy ground forces. The South Vietnamese Air Force (VNAF) used a number of USAF-supplied T-28Bs in a similar role until the -Ds became available.

The T-28B on display (Navy BuNo 140048) was flown to the Museum on March 12, 1987. It is painted as a VNAF T-28B assigned to Bien Hoa Air Base in 1962--where USAF pilots trained and flew combat missions with VNAF crews in Operation Farm Gate.

SPECIFICATIONS
Span: 40 ft. 7 in.
Length: 32 ft. 6 in.
Height: 12 ft. 7 in.
Armament: Two .50 cal. guns, plus 1,800 lbs. of bombs or rockets, all carried externally
Engine: One Wright R-1820 of 1,425 hp.
Crew: Two
Cost: $142,000
Serial number: BuNo 140048
C/N: 219-47
Displayed as: VNAF 38365

PERFORMANCE
Maximum speed: 346 mph.
Cruising speed: 230 mph.
Range: 1,060 miles
Service Ceiling: 37,000 ft.


การบินเฉลิมพระเกียรติ ๖๐ พรรษามหาราชินี, ทอ., หน้า ๗๙.
http://www.wpafb.af.mil/museum/modern_flight/mf12.htm
http://www.wpafb.af.mil/museum/annex/an26.htm

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