Stearman XA-21

Stearman XA-21

Infobox Aircraft
name=XA-21
type=Ground attack
manufacturer=Stearman


caption= Stearman XA-21 (Streamlined Cockpit)
designer=
first flight=1938
introduced=
retired=
status=Prototype
primary user=U.S. Army Air Corps
more users=
produced=
number built=1
unit cost=
variants with their own articles=
The Stearman Model X-100 was a competitor in an United States Army Air Corps competition for a twin-engined attack aircraft which (after redesigns) led to the A-20 Havoc, A-22 Maryland and B-25 Mitchell.

Design and development

The X-100, designated XA-21 following purchase by the Army Air Corps, was a twin engined high-winged monoplane of all metal construction. It featured an unusual cockpit arrangement with a streamlined greenhouse canopy enclosing both the pilot and bombardier stations. Bowers 1989, p.273] This was found to restrict the pilot's forward vision, and the aircraft was rebuilt with a conventional (stepped) nose and cockpit structure. Although this did not significantly affect performance, the XA-21 was not ordered into production.

The sole XA-21 had serial number "40-141".

Operators

;flag|United States|1912
*United States Army Air Corps

pecifications (XA-21)

aircraft specifications
plane or copter?=plane
jet or prop?=prop

ref=J. Baugher [cite web
url=http://home.att.net/~jbaugher4/a21.html
title=Stearman XA-21
last=Baugher
first=J
date=August 20, 2000
accessdate=2006-10-25
work=
publisher=
]
crew=3
capacity=
length main=53 ft 1 in
length alt=16.18 m
span main=65 ft 0 in
span alt=19.81 m
height main=14 ft 2 in
height alt=4.32 m
area main=607 ft²
area alt=56.39 m²
airfoil=
empty weight main=12,760 lb
empty weight alt=5,789 kg
loaded weight main=18,230 lb
loaded weight alt=8,269 kg
useful load main=5,560 lb
useful load alt=2,520 kg
max takeoff weight main=
max takeoff weight alt=
more general=

engine (prop)=Pratt & Whitney R-2180-7
type of prop=radial engines
number of props=2
power main=1,400 hp
power alt=1,030 kW
max speed main=223 knots
max speed alt=257 mph, 414 km/h
cruise speed main=174 knots
cruise speed alt=200 mph, 322 km/h
never exceed speed main=
never exceed speed alt=
stall speed main=
stall speed alt=
range main=
range alt=
ceiling main=
ceiling alt=
climb rate main=
climb rate alt=
loading main=30.0 lb/ft²
loading alt=147 kg/m²
power/mass main=0.15 hp/b
power/mass alt=250 W/kg
more performance=

guns=
**4× wing-mounted 0.30 in (7.62 mm) M1919 Browning machine guns
**1× nose-mounted 0.30 in machine gun
**4× aft-firing 0.30 in machine guns
bombs=2,700 lb (1,200 kg)

avionics=

References

* Bowers, Peter M. "Boeing Aircraft since 1916". London:Putnam, Second edition, 1989. ISBN 0-85177-804-6.

ee also

aircontent

related=

similar=
*Junkers Ju 88
*Bristol Blenheim

lists=
* List of military aircraft of the United States

see also=


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