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Grumman American AA-1 Trainer / Lynx / T-Cat

 

grumaa1c
AA-1


During 1964, the American Aviation Corporation was formed to bring new life to the promising BD-1 design. The prototype AA-1 Yankee N888M first flew on March 2nd, 1967. The AA-1 was a little larger than the original BD-1 with a more powerful 108hp Lycoming 0-235-C2C engine. It made use of metal-to-metal bonding of components, which was a technique not previously used to and great degree in general aviation aircraft. Also, the construction used a large amount of high-strength aluminium honeycomb material within the fuselage structure and fibreglass in the undercarriage legs. This side-by-side trainer first entered production in 1968 as the American Aviation AA-1 Yankee.


The type went into production at Cuyahoga County Airport, Cleveland, Ohio. In all production of the AA-1 Yankee totalled 461 units plus the prototype.


The American Yankee was followed by the American Trainer, which incorporated a new wing section designed for more docile handling. 680 Trainers were built.
The AA-1 Yankee design was progressively developed into the AA-1B Trainer and the AA-1C Lynx.


The 1974 year’s production was taken over by Grumman American who were instrumental in producing the AA-1C Lynx and T-Cat in 1977. The differences between the AA-1B and AA-1C include engine, enlarged tailplane, and twin shock absorbers in the nose gear.


The T-Cat's closest sibling, the Lynx, is nearly its twin. The only substantial difference between the two airplanes is the propeller: the former has a climb prop, which provides an extra 50 feet per minute; the latter has a cruise prop, which offers an additional five knots at cruise.


Production of the type ceased in December 1978 after 211 Lynx were built.

 

Gallery

 

1971 Grumman American Trainer AA-1A
Engine: Lycoming O-235, 108 hp
TBO: 2000 hr
Fuel type: 100
Propeller: Fixed
Landing gear: Fixed nose
Max ramp weight: 1500 lb
Gross weight: 1500 lb
Max landing weight: 1500 lb
Empty weight: 1007lb
Useful load: 1007 lb
Payload, full fuel: 349 lb
Usable fuel: 24 USgal
Wingspan: 25 ft 5 in
Overall length: 19 ft. 3 in
Height: 6 ft. 8 in.
Wing area:100.9 sq. ft
Wing loading: 12.6 lbs./sq. ft
Power loading: 15 lb/hp
Wheel track: 8 ft. 3 in.
Seating capacity: 2
Cabin width: 41 in
Cabin height: 45 in
Baggage capacity: 100 lb  
Cruise speed 55% power: 100 kt
Max range (w/ reserve) 65% power: 399 nm
Fuel consumption 55% power: 4.2 USgph
Stall speed (flaps up): 55 kt
Stall speed (flaps down): 51 kt
Best rate of climb: 765 fpm
Service ceiling: 13,750 ft
Takeoff ground roll: 700 ft
Landing ground roll: 395 ft

AA-1B TR-2 Trainer
Engine: Lycoming O-235-C2C, 108 hp.
Seats: 2.

AA-1C Lynx
Engine: 1 x Lycoming O-235-L2C, 115 hp.
Seats: 2.
Wing loading: 15.9 lb/sq.ft.
Pwr loading: 13.9 lb/hp.
Gross wt: 1600 lb.
Empty wt: 1066 lb.
Equipped useful load: 507 lb.
Payload max fuel: 375 lb.
Range max fuel/75% pwr: 326nm/2.7hr.
Range max fuel / 55% pwr: 350 nm/ 3.7 hr.
Service ceiling: 11,500 ft.
75% cruise: 117 kt.
55% cruise: 96 kt.
Stall: 52-54 kt. 1.3
Vso: 68 kt.
ROC: 700 fpm.
Min field length: 1590 ft.
Fuel cap: 132 lb.

AA-1C T-Cat
Engine: Lycoming O-235-L2C, 115 hp.
TBO: 2,000 hrs.
Prop: Sensenich fixed-pitch, 72-inch diameter.
Length: 19 ft. 3 in.
Height: 7 ft. 7 in.
Wingspan: 24 ft. 5 in.
Wing area: 100.9 sq.ft.
Wing loading: 15.85 lb/sq.ft.
Power loading: 13.91 lb/hp.
Seats: 2.
Empty weight: 1,075 lbs.
Useful load: 525 lbs.
Payload with full fuel: 382 lbs.
Gross weight: 1,600 lbs.
Usable fuel capacity: 22 USG/132 lbs.
Maximum landing weight: 1,600 lbs.
Maximum rate of climb: 750 fpm.
Service ceiling: 11,900 ft.
Maximum speed: 125 kts.
Max cruise, 74% power (2,700 rpm) at 5,000 ft: 112 kts.
Econ cruise, 55 % power at 6,000 ft: 93 kts.
Duration at max cruise: 3.4 hrs.
Duration at econ cruise: 4.4 hrs.
Stalling speed, clean  57 kts.
Stalling speed, full flaps: 53 kts.

 

 


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