Boeing Y1B-20
From Free net encyclopedia
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.
Specifications (as designed)
{{airtemp
|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 kt, 415 km/h |cruise speed main=242 mph |cruise speed alt=210 kt, 389 km/h |range main=4,000 mi |range alt=3,500 nm, 6,400 km |ceiling main= ft |ceiling alt= m |climb rate main= ft/min |climb rate alt= m/s |loading main= lb/ft² |loading alt= kg/m² |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</ul>
|bombs=
- 17,600 lb (6,620 kg) of bombs
}}
External links
Related content
{{aircontent |sequence=
- Military: B-17 - B-18 - XB-19 - Y1B-20 - XB-21 - XB-22 - B-23
- Boeing: 299 - 307 - 314 - 316 - 341 - 345 - 367
|related=
|similar aircraft=
|lists=
|see also=
}}