/ Ryan ST / PT-22 Recruit
Ryan ST / PT-22 Recruit
The Ryan STs were a series of two seat, low-wing monoplane aircraft built in the United States by the Ryan Aeronautical Company.
They were used as sport aircraft, as well as trainers by flying schools and the militaries of several countries.
The Ryan PT-22 Recruit, the main military version of the Ryan ST, is a military trainer aircraft used by the United States Army Air Corps during WWII for primary pilot training.
Prototype and first model, fitted with a Menasco B4 engine of 95 hp; five built.
Improved ST designed for aerobatics, fitted with a Menasco C4 engine of 125 hp; 73 built.
Improved ST-A, fitted with a super-charged Menasco C4S engine of 150 hp; 10 built.
Single-seat variant of ST-A with extra fuel tank in place of front cockpit; one built, later converted to ST-A.
Military version of ST-A Special, some with provision for a machine gun; 22 built for various South American air-forces.
Variant of STM for Netherlands East Indies Army and Navy; 95 built.
Variant of STM delivered to China, fitted with a Menasco C4S2 engine of 165 hp; 48 built.
Single-seat variant of the STM-2E with provision for a machine gun, also delivered to China; 2 built.
Variant of STM-2 with interchangeable wheel landing gear or floats for Netherlands East Indies Navy; 13 built.
Experimental conversions, with a Warner Scarab radial engine; one converted from USAAC YPT-16 with Scarab of 125 hp; one converted from USAAC PT-20A with Super Scarab of 160 hp.
Variant with new fuselage shape and a Kinner B-5 radial engine of 125 hp; one built.
Variant of ST-3 with a Kinner R-5 radial engine of 160 hp, one built.
Variant of ST-3 manufactured with wooden fuselage; one built.
US military designations
A single ST-A bought by the USAAC for evaluation.
XPT-16 re-engine with Kinner R-440 radial engine of 125 hp.
A total of 15 aircraft similar to the ST-M ordered for service trials.
14 YPT-16s re-engine with Kinner R-440 engine.
Production version of PT-16,
Designation of PT-20s that were re-engine with Kinner R-440 engines.
Military production version of ST-3; 100 built.
Military production version of ST-3KR with Kinner R-540-1 engine, 1,048 built, including PT-22As.
Designation for 25 examples of ST-3KR built for the Royal Netherlands Air Force but not delivered, aircraft subsequently taken by the USAAF.
Aircraft re-engine with Kinner R-540-3 engines, 250 aircraft modified.
Military version of ST-4, ordered for evaluation; five built.
Naval production version of ST-3, 100 built.
21 ft 5 in (6.53 m)
29 ft 11 in (9.12 m)
6 ft 11 in (2.11 m)
124 sq ft (11.5 m2)
1,023 lb (464 kg)
1,575 lb (714 kg)
24 US gal (20 imp gal; 91 L)
1 × Menasco C4 inverted four-cylinder air-cooled inline-engine, 125 hp (93 kW)
150 mph (240 km/h, 130 kn)
127 mph (204 km/h, 110 kn)
42 mph (68 km/h, 36 kn) (with flaps)
350 mi (560 km, 300 nmi)
17,500 ft (5,300 m)
Rate of climb
1,200 ft/min (6.1 m/s).
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