Engineering:Boeing XAT-15

AT-15

Role	Bomber-crew trainer
National origin	United States
Manufacturer	Boeing Wichita
First flight	April 9th, 1942
Primary user	United States Army Air Corps
Number built	2

The Boeing AT-15 was an American twin-engined bomber crew trainer designed and built by Boeing's Wichita Division. Only two prototypes, designated XAT-15, were built. Plans to build over 1,000 were cancelled on the United States' entry into the Second World War.

Development

One of the first projects for the former Stearman Aircraft Company which in 1939 had become the Wichita Division of Boeing was a twin-engined trainer for bomber crews. Designated X-120 by the company, two examples were ordered by the United States Army Air Corps as the XAT-15. The AT-15 was a high-wing cantilever monoplane with two wing-mounted Pratt & Whitney R-1340 Wasp radial engines. It had a retractable tailwheel landing gear and an extended glazed fuselage nose for the trainee bomb-aimer. Due to shortage of materials, the aircraft was built of welded steel tube covered with plywood, with wooden wings and tail unit. The two aircraft were delivered to the USAAC, but after the country's entry into the war a change in priorities resulted in the planned order for more than 1,000 aircraft not being placed.

According to Edward H. Phillips, "The aircraft's specific purpose would be to teach prospective bomber crews how to work together as a team before they were assigned to an operational unit." On 19 May 1941, Boeing signed a contract to build two of the aircraft. On 9 April 1942, the first flight occurred. In October 1942, the first XAT-15 was delivered. However, special schools for gunners, bombardiers, navigators, and pilots developed during the war, and the need for the XAT-15 disappeared. As a result, production was halted and materials salvaged.^[1]

Operator

United States

United States Army Air Corps

Specifications (XAT-15)

Data from ^[2]

General characteristics

Length: 42 ft 4 in (12.90 m)
Wingspan: 59 ft 8 in (18.19 m)
Height: 13 ft 1 in (3.99 m) ^[3]
Wing area: 457 sq ft (42.5 m²)
Empty weight: 10,640 lb (4,826 kg)
Gross weight: 14,355 lb (6,511 kg)
Powerplant: 2 × Pratt & Whitney R-1340-AN-1 Wasp radial piston engine , 600 hp (450 kW) each

Performance

Maximum speed: 207 mph (333 km/h, 180 kn) at 5,000 ft (1,500 m)^[3]
Cruise speed: 185 mph (298 km/h, 161 kn) ^[3]
Range: 850 mi (1,370 km, 740 nmi)
Service ceiling: 18,900 ft (5,800 m)
Time to altitude: 11.9 minutes to 10,000 ft (3,000 m)^[3]

Armament

4 x 0.3in (7.62mm) machine-gun
10 x 100lb (45kg) bomb

References

Notes

↑ Phillips, Edward (2006). Stearman Aircraft: A Detailed History. North Branch, MN: specialtypress. pp. 160–168. ISBN 9781580070874.
↑ Orbis 1985, page 815
↑ ^3.0 ^3.1 ^3.2 ^3.3 Bowers 1989, p. 275

Bibliography

Bowers, Peter M. (1989). Boeing Aircraft since 1916. London: Putnam Aeronautical Books. ISBN 0-85177-804-6.
Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions.
The Illustrated Encyclopedia of Aircraft (Part Work 1982–1985). Orbis Publishing.

External links

Aerofiles

Template:Stearman

v t e Boeing military aircraft
Fighters/attack aircraft:	PW-9/FB F2B F3B F4B XF6B P-29/XF7B XF8B P-12 P-26 818 F-15E F-22 AV-8B F-15SE F/A-18E/F EA-18G
Bombers	YB-9 XB-15 B-17 Y1B-20 B-29 XB-38 XB-39 YB-40 XB-44 B-47 B-50 B-52 B-54 XB-55 XB-56 XB-59 B-1
Piston-engined transports	C-73 C-75 C-97 C-98 C-108
Jet transports	C-135 C-137 CC-137 YC-14 C-17 C-22 VC-25 C-32 C-40
Tanker-transports	KB-29 KB-50 KC-97 KC-135 KC-137 KC-10 KC-46 KC-767
Trainers	PT-13 PT-17 PT-18 PT-27 XAT-15 T-43 T-45 T-7
Patrol and surveillance	XPB XPBB XP3B P-8 EC-135 EC-18 E-3 E-4 E-6 E-8 E-10 E-767 737 AEW&C
Reconnaissance	NC-135 OC-135B RC-135 WC-135
Drones/UAVs	ATS CQM-121 MQ-18 MQ-25 MQ-27 X-50 ScanEagle
Experimental/prototypes	X-20 X-32 X-36 X-37 X-40 X-45/Phantom Ray X-48 X-50 X-51 X-53 YAL-1 Phantom Eye Bird of Prey

United States trainer aircraft designations, Army/Air Force and Tri-Service systems

Advanced trainer
(1925–1948)

Basic combat
(1936–1940)

Basic trainer
(1930–1948)

Primary trainer
(1924–1948)

Main sequence
(1948–present)

1948 redesignations	T-6 T-7 T-11 T-13² T-13A T-13B/D T-17 T-19
New designations	T-28 T-29 T-30 T-31 T-32 T-33 T-34 T-35 T-36 T-37 T-38 T-39 T-40 T-41² Grumman T-41 Cessna T-41 T-42 T-43 T-44 T-45 T-46 T-47² T-47A OT-47B T-48² YT-48 T-48TS T-49 T-50 T-51 T-52 T-53 T-54

Alternate sequences

1962 redesignations	T-1 T-2
Since 1990	T-1 T-2¹ T-3 T-4¹ T-5¹ T-6 T-7

¹ Not assigned

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