RF-6B
Main Fournier production series with Rolls-Royce-built Continental O-200 100 hp (75 kW) engine (43 built)
RF-6B/120
RF-6B with Lycoming O-235 120 hp (89 kW) engine, one built
RF-6C
Four-seat version of RF-6B built by Sportavia with Lycoming O-320 engine, four built, developed into Sportavia RS-180
T67A
Slingsby-built RF-6B/120 certified on 1 October 1981, O-235 118hp engine, wooden construction, 2 blade fixed prop, fuel in firewall tank, single piece canopy, ten built
T67M Firefly
First flown on 5 December 1982 and certified on 2 August 1983, the T67M was developed from the T67A as a glass-reinforced plastic aircraft for a role as a military trainer.
The T67M has a 160 hp (120 kW) fuel-injected Lycoming AEIO320-D1B and a two-blade Hoffman HO-V72L-V/180CB constant-speed propellor, single piece canopy, fuel in firewall tank.
The fuel-injected engine with inverted fuel and oil systems allowed the aircraft to perform sustained negative-G (inverted) aerobatics, although inverted spins were never formally approved.
A total of 32 T67Ms (including the later T67M MkII) were produced.

T67B
First flown on 16 April 1981 and certified on 18 September 1984, the T67B was effectively the T67A made, like the T67M, in glassfibre reinforced plastic, but without the up-rated engine and propeller.
O-235 118hp engine, 2 blade fixed prop, fuel in firewall tank, single piece canopy.
A total of 14 T67Bs were produced.

T67M MkII Firefly
Certified on 20 December 1985, AEIO-320 fuel injected 160hp engine, 2 blade constant speed prop, inverted fuel and oil systems.
The T67M MkII replaced the single-piece canopy of the T67M with a two-piece design, and the single fuselage fuel tank with two, larger tanks in the wings.

T67M200 Firefly
Certified on 19 June 1987, the T67M200 was had a more powerful 200 hp (149 kW) Lycoming AEIO360-A1E with a three-bladed Hoffman propellor, inverted fuel and oil systems.
A total of 26 T67M-200s were produced.

T67C Firefly
Certified on 15 December 1987, the T67C was the last of the "civilian" variants, based on the T67B with an uprated 160 hp (120 kW) Lycoming O-320 engine, but without fuel injection and inverted-flight systems found on the T67M variants.
Two blade constant speed prop.
Two further sub-versions of the T67C copied the two-piece canopy (T67C-2) and wing tanks (T67C-3, sometimes known as the T67D) from the T67M MkII.
A total of 28 T67Cs were produced across the three versions.

T67M260 Firefly
Certified on 11 November 1993, the T67M260 added even more power from the six-cylinder, 260 hp (190 kW) Lycoming AEIO540-D4A5 engine, three blade constant speed prop.
Unusually for side-by-side light aircraft, the T67M260 was built to be flown solo from the right-hand seat to allow student pilots to immediately get used to the left-hand throttle found in most military aircraft – earlier models of the T67M had a second throttle on the left-hand sidewall of the cabin.
A total of 51 T67M-260s were produced.
They were used to successfully train hundreds of RAF, RN, British Army, and foreign and Commonwealth pilots through Joint Elementary Flying Training School until late 2010.

T67M260-T3A Firefly
Certified on 15 December 1993, the last military version of the T67 family was the T67M260-T3A, of which the entire production run of 114 was purchased by the United States Air Force, where it was known as the T-3A. The T-3A was basically the T67M260 with the addition of air conditioning.
Although the US media claimed the aircraft was to blame after four aircraft were destroyed in accidents, no engine stoppages or vapour-lock problems with the fuel system were found during very thorough tests at Edwards AFB.
All three instructors killed in the accidents came from the C-141, a large-transport aircraft.
Their only prior aerobatic experience was in Air Force pilot training in the T-37 and T-38 jet trainers.
This, combined with thinner air at the higher density altitude of the Academy airfield and training areas, meant spin recovery was delayed and/or improper spin prevent/recovery techniques were used.
Parachutes were not worn o
RF-6B
Main Fournier production series with Rolls-Royce-built Continental O-200 100 hp (75 kW) engine (43 built)
RF-6B/120
RF-6B with Lycoming O-235 120 hp (89 kW) engine, one built
RF-6C
Four-seat version of RF-6B built by Sportavia with Lycoming O-320 engine, four built, developed into Sportavia RS-180
T67A
Slingsby-built RF-6B/120 certified on 1 October 1981, O-235 118hp engine, wooden construction, 2 blade fixed prop, fuel in firewall tank, single piece canopy, ten built
T67M Firefly
First flown on 5 December 1982 and certified on 2 August 1983, the T67M was developed from the T67A as a glass-reinforced plastic aircraft for a role as a military trainer. The T67M has a 160 hp (120 kW) fuel-injected Lycoming AEIO320-D1B and a two-blade Hoffman HO-V72L-V/180CB constant-speed propellor, single piece canopy, fuel in firewall tank. The fuel-injected engine with inverted fuel and oil systems allowed the aircraft to perform sustained negative-G (inverted) aerobatics, although inverted spins were never formally approved. A total of 32 T67Ms (including the later T67M MkII) were produced.
T67B
First flown on 16 April 1981 and certified on 18 September 1984, the T67B was effectively the T67A made, like the T67M, in glassfibre reinforced plastic, but without the up-rated engine and propeller. O-235 118hp engine, 2 blade fixed prop, fuel in firewall tank, single piece canopy. A total of 14 T67Bs were produced.
T67M MkII Firefly
Certified on 20 December 1985, AEIO-320 fuel injected 160hp engine, 2 blade constant speed prop, inverted fuel and oil systems. The T67M MkII replaced the single-piece canopy of the T67M with a two-piece design, and the single fuselage fuel tank with two, larger tanks in the wings.
T67M200 Firefly
Certified on 19 June 1987, the T67M200 was had a more powerful 200 hp (149 kW) Lycoming AEIO360-A1E with a three-bladed Hoffman propellor, inverted fuel and oil systems. A total of 26 T67M-200s were produced.
T67C Firefly
Certified on 15 December 1987, the T67C was the last of the "civilian" variants, based on the T67B with an uprated 160 hp (120 kW) Lycoming O-320 engine, but without fuel injection and inverted-flight systems found on the T67M variants. Two blade constant speed prop. Two further sub-versions of the T67C copied the two-piece canopy (T67C-2) and wing tanks (T67C-3, sometimes known as the T67D) from the T67M MkII. A total of 28 T67Cs were produced across the three versions.
T67M260 Firefly
Certified on 11 November 1993, the T67M260 added even more power from the six-cylinder, 260 hp (190 kW) Lycoming AEIO540-D4A5 engine, three blade constant speed prop. Unusually for side-by-side light aircraft, the T67M260 was built to be flown solo from the right-hand seat to allow student pilots to immediately get used to the left-hand throttle found in most military aircraft – earlier models of the T67M had a second throttle on the left-hand sidewall of the cabin. A total of 51 T67M-260s were produced. They were used to successfully train hundreds of RAF, RN, British Army, and foreign and Commonwealth pilots through Joint Elementary Flying Training School until late 2010.
T67M260-T3A Firefly
Certified on 15 December 1993, the last military version of the T67 family was the T67M260-T3A, of which the entire production run of 114 was purchased by the United States Air Force, where it was known as the T-3A. The T-3A was basically the T67M260 with the addition of air conditioning. Although the US media claimed the aircraft was to blame after four aircraft were destroyed in accidents, no engine stoppages or vapour-lock problems with the fuel system were found during very thorough tests at Edwards AFB. All three instructors killed in the accidents came from the C-141, a large-transport aircraft. Their only prior aerobatic experience was in Air Force pilot training in the T-37 and T-38 jet trainers. This, combined with thinner air at the higher density altitude of the Academy airfield and training areas, meant spin recovery was delayed and/or improper spin prevent/recovery techniques were used. Parachutes were not worn o
Slingsby T67 Firefly