Boeing Y1B-20

Infobox Aircraft
name=Boeing Y1B-20


caption=
type=Heavy bomber
manufacturer=Boeing
designer=
first flight=n/a
introduced=
retired=
status=Cancelled
primary user=United States Army Air Forces
more users=
produced=
number built=0
unit cost=
variants with their own articles=The Boeing Y1B-20 (Boeing 316) was designed as an improvement on the Boeing XB-15. ("Y1B-" indicates a funding source outside normal fiscal year procurement.) It was slightly larger than its predecessor, and was intended to use much more powerful engines. It was presented to the Army in early 1938, and two orders were placed soon after. The order was reversed before construction began.

Despite their cancellation, the XB-15 and Y1B-20 laid the groundwork for the B-29 Superfortress, one of the most famous and most successful World War II bombers.

pecifications (as designed)

aircraft specifications

plane or copter?=plane
jet or prop?=prop

crew=10
length main=109 ft 2 in
length alt=33.3 m
span main=157 ft 0 in
span alt=47.8 m
height main=23 ft 4 in
height alt=7.1 m
area main= ft²
area alt= m²
empty weight main=87,500 lb
empty weight alt=39,700 kg
loaded weight main=91,500 lb
loaded weight alt=41,500 kg
max takeoff weight main=105,100 lb
max takeoff weight alt=47,700 kg

number of props=4
type of props=geared radials
engine (prop)=Wright GR-2600-A73
power main=1,350 hp
power alt=1,000 kW

max speed main=258 mph
max speed alt=224 knots, 415 km/h
cruise speed main=242 mph
cruise speed alt=210 knots, 389 km/h
range main=4,000 mi
range alt=3,500 nm, 6,400 km
ceiling main=
ceiling alt=
climb rate main=
climb rate alt=
loading main=
loading alt=
power/mass main=0.059 hp/lb
power/mass alt=97 W/kg

guns=
** 3× .30 in (7.62 mm) machine guns
** 4× .50 in (12.7 mm) machine guns
bombs=17,600 lb (6,620 kg)

External links

* [http://home.att.net/~jbaugher2/b20.html Encyclopedia of American Aircraft]
* [http://www.wpafb.af.mil/museum/research/bombers/b2-28.htm USAF Museum description of Y1B-20]

ee also

aircontent
related=
* Boeing XB-15

similar aircraft=
* Douglas XB-19
* Martin XB-16
* B-29 Superfortress

sequence=

lists=
* List of bomber aircraft
* List of military aircraft of the United States

see also=