Leading up to its famous stable of World War 2 heavy bombers, Boeing undertook a variety of projects to further existing technologies and enhance qualities for long endurance flight of heavy airframes. For a year beginning in mid-1935 it was designated the XBLR-1.When it first flew in 1937, it was the most massive and voluminous aircraft ever built in the US. provide more power, the Model 316 was to have been powered by four

Model 316 was offered to the Army in several different forms.

the basic design, the Boeing company offered a more advanced version Model 316D version, which featured a high-winged design with an 80,000 Please direct all other inquiries to militaryfactory AT gmail.com. Despite their cancellation, the XB-15 and Y1B-20 laid the groundwork for the Boeing B-29 Superfortress.[1]. * Ribbons not necessarily indicative of actual historical campaign ribbons. or carrying capability beyond those of the B-17. (Showcased structural dimension values pertain to the. Ribbons are clickable to their respective campaigns/operations. feet Armed with seven machine guns.

approximately the same size as the XB-15. examples were ordered by the Army in June of 1938 under the The Y1B-20 was essentially an evolved, dimensionally larger version designed around use of more powerful engines - 4 x Wright GR-2600-A73 rated at 1,350 horsepower being the intended type. It was presented to the Army in early 1938, and two orders were placed soon after. 4 x Wright GR-2600-A73 radial piston engines developing 1,350 horsepower each driving three-bladed propeller units. Material presented throughout this website is for historical and entertainment value only and should not to be construed as usable for hardware restoration, maintenance, or general operation. The Boeing Y1B-20 (Boeing 316) was designed as an improvement on the Boeing XB-15 (Y1- indicates a funding source outside normal fiscal year procurement.) On February 18, 1943, the second of Boeing's top-secret XB-29 prototype Superfortress bombers catches fire 20 minutes after takeoff from Boeing Field and crashes into the Frye Packing Plant. The order was reversed before construction began. The sole aircraft nicknamed `Grandpappy’, served with the 2nd BG at Langley Field and later, after being re-designated as the XC-105 transport, with the 20th TCS (Troop Carrier Squadron).

Articles incorporating text from Wikipedia, Cancelled military aircraft projects of the United States, List of military aircraft of the United States, https://military.wikia.org/wiki/Boeing_Y1B-20?oldid=3018150. As such, no examples were ever completed by Boeing and the project was lost to aviation history. It was known by the company as the Model 316, and was Airborne 10.09.20: Supersonic XB-1, ACJ TwoTwenty, Starliner Crew Shakeup Also: Honeywell Forecast, NBAA Airmanship Award, Fortress UAV, True Blue Power for PC-12 1400 hp Pratt & Whitney R-2180 Twin Hornet air cooled radials. pound gross weight, 152-foot wingspan, seven machine guns, and a It was known by the company as the Model 316, and was approximately the same size as the XB-15. However, in an attempt to It was presented to the Army in early 1938, and two orders were placed soon after.The order was reversed before construction began. At 12:26 PM, only 3 miles from Boeing Field, the #2 XB-29 crashed into the Frye Meat Packing Plant killing pilots Eddie Allen, Bob Dansfield, and the other 6 crew members on board. The Boeing Y1B-20 (Boeing 316) was designed as an improvement on the Boeing XB-15 (Y1-indicates a funding source outside normal fiscal year procurement.)

(Showcased powerplant information pertains to the, (Showcased performance values pertain to the, (Showcased armament details pertain to the. too expensive and that they really did not require bombers with range It was slightly larger than its predecessor, and was intended to use much more powerful engines. Authored By: Staff Writer | Last Edited:

On June 8, 1966, an accident during a photo flight took the lives of two pilots and destroyed two airplanes—the XB-70A-2 and an F-104 that had been captured by the Valkyrie’s vortex wake. of the XB-15. One such program became the Y1B-20 (Boeing Model 316), an offshoot of the experimental XB-15.