The Model 21 was an aerodynamic cleaned up version of the Model 12/PT-3, one of the distinguishing features being curved instead of angular tail surfaces. The aircraft was a single-engined biplane with fixed tailwheel landing gear and accommodation for two in open cockpits.
Operational historyedit
Designated the PT-11 by the United States Army Air Corps it progressed through a number of trial variants but was not built in large numbers. 11 Examples of the model 21-C were built in Canada as the 21-M for Mexico but none were built for local use.
Variantsedit
XPT-933
(Model 21A). Prototype powered by 170 hp (130 kW) Kinner engine, first flew February 1931.[3]
YPT-11
Evaluation aircraft for US Army based on the Model 21A with a 165 hp (123 kW) Continental R-545-1 engine, four built.[3]
PT-11A
One YPT-11 was re-engined with a 175 hp (130 kW) Curtiss R-600-1 Challenger engine, originally as Y1PT-11A, later converted to PT-11C standard.[3]
Y1PT-11B
One YPT-11 was re-engined with a 210 hp (160 kW) Kinner YR-720-1 engine and designated Y1PT-11B. 5 production aircraft for US Army with another for the United States Coast Guard and designated N4Y-1.[4]
PT-11C
PT-11A re-engined with a 180 hp (130 kW) Lycoming YR-680-1 engine. One or two converted for US Army, with 18 new-build aircraft for Colombia.[5]
PT-11D
Production version with 220 hp (160 kW) R-680-3 engine, originally designated Y1PT-11D. 21 new-built, plus five conversions from Y1PT11-Bs and two from Y1PT-11s.[5]
PT-12
A version of the PT-11 with a 300hp R-985-1 engine and detailed changes, ten built later redesignated BT-7.
Y1BT-6
Y1BT-6
One YPT-11 was re-engined with a 300hp R-985-1
BT-6
Redesignation of Y1BT-6.
BT-7
BT-7
PT-12 aircraft redesignated.
XN4Y-1
Evaluation aircraft for the United States Coast Guard, three built.
N4Y-1
One YPT-11B for the USCG, later modified to the same standard as the XN4Y-1
Wegg, John (1990). General Dynamics Aircraft and their Predecessors. London: Putnam Aeronautical Books. ISBN0-85177-833-X.
April 12, 2024
consolidated, consolidated, model, american, seat, training, aircraft, built, consolidated, aircraft, company, used, united, states, army, corps, with, designation, united, states, coast, guard, under, designation, 11consolidated, y1pt, 11role, primary, traine. The Consolidated Model 21 was an American two seat training aircraft built by the Consolidated Aircraft Company It was used by the United States Army Air Corps with the designation PT 11 and the United States Coast Guard under the designation N4Y PT 11Consolidated Y1PT 11Role Primary trainerManufacturer Consolidated Aircraft Company Fleet AircraftIntroduction 1931Primary users United States Army Air CorpsUnited States Coast GuardNumber built 41 1 2 Contents 1 Design and development 2 Operational history 3 Variants 4 Operators 5 Specifications PT 11D 6 See also 7 ReferencesDesign and development editThe Model 21 was an aerodynamic cleaned up version of the Model 12 PT 3 one of the distinguishing features being curved instead of angular tail surfaces The aircraft was a single engined biplane with fixed tailwheel landing gear and accommodation for two in open cockpits Operational history editDesignated the PT 11 by the United States Army Air Corps it progressed through a number of trial variants but was not built in large numbers 11 Examples of the model 21 C were built in Canada as the 21 M for Mexico but none were built for local use Variants editXPT 933 Model 21A Prototype powered by 170 hp 130 kW Kinner engine first flew February 1931 3 YPT 11 Evaluation aircraft for US Army based on the Model 21A with a 165 hp 123 kW Continental R 545 1 engine four built 3 PT 11A One YPT 11 was re engined with a 175 hp 130 kW Curtiss R 600 1 Challenger engine originally as Y1PT 11A later converted to PT 11C standard 3 Y1PT 11B One YPT 11 was re engined with a 210 hp 160 kW Kinner YR 720 1 engine and designated Y1PT 11B 5 production aircraft for US Army with another for the United States Coast Guard and designated N4Y 1 4 PT 11C PT 11A re engined with a 180 hp 130 kW Lycoming YR 680 1 engine One or two converted for US Army with 18 new build aircraft for Colombia 5 PT 11D Production version with 220 hp 160 kW R 680 3 engine originally designated Y1PT 11D 21 new built plus five conversions from Y1PT11 Bs and two from Y1PT 11s 5 PT 12 A version of the PT 11 with a 300hp R 985 1 engine and detailed changes ten built later redesignated BT 7 nbsp Y1BT 6Y1BT 6 One YPT 11 was re engined with a 300hp R 985 1 BT 6 Redesignation of Y1BT 6 nbsp BT 7BT 7 PT 12 aircraft redesignated XN4Y 1 Evaluation aircraft for the United States Coast Guard three built N4Y 1 One YPT 11B for the USCG later modified to the same standard as the XN4Y 1Operators edit nbsp United StatesUnited States Army Air Corps United States Coast Guard nbsp ColombiaColombian Air Force PT 11C nbsp ParaguayParaguayan Air Arm Model 21 C nbsp MexicoMexican Air Force Model 21 M Specifications PT 11D editData from The Illustrated Encyclopedia of Aircraft Part Work 1982 1985 Orbis PublishingGeneral characteristicsCrew two Length 26 ft 11 in 8 20 m Wingspan 31 ft 7 in 9 63 m Height 9 ft 8 in 2 95 m Wing area 280 sq ft 26 01 m2 Empty weight 1 918 lb 870 kg Max takeoff weight 2 585 lb 1 173 kg Powerplant 1 Lycoming R 680A radial piston 200 hp 149 kW Performance Maximum speed 118 mph 190 km h 103 kn Service ceiling 13 700 ft 4 175 m See also editConsolidated PT 3References edit nbsp Wikimedia Commons has media related to Consolidated PT 11 U S Army Aircraft 1908 1946 by James C Fahey 1946 64pp Fleet a b c Wegg 1990 p 64 Wegg 1990 p 65 a b Wegg 1990 pp 64 65 The Illustrated Encyclopedia of Aircraft Part Work 1982 1985 Orbis Publishing Wegg John 1990 General Dynamics Aircraft and their Predecessors London Putnam Aeronautical Books ISBN 0 85177 833 X Retrieved from https en wikipedia org w index php title Consolidated PT 11 amp oldid 1081316557, wikipedia, wiki, book, books, library,
