kidzsearch.com > wiki Explore:images videos games
|Model 200 and 221 Monomail|
|A United Airlines Model 221|
|First flight||6 May 1930|
|Primary user||United Airlines|
|Developed into||Boeing YB-9|
Design and development
The Boeing Monomail was a monoplane instead of a biplane. Its wheels could be retracted. Only one plane was made for the US Army to look at. The plane eventually began to fly main from San Francisco to Chicago.
Another version was made, the Model 221. It was made longer by 8 inches. This meant it could carry passengers, but less cargo. This version first flew on 18 August 1930.
There were no good engines for the Boeing Monomail to use. By the time good engines could be used, new planes had been made which were better than the Monomail. One of these was the Boeing 247.
Types of Boeing Monomail
- Model 200
- mailplane (one was built)
- Model 221
- mailplane which could carry six passengers (one was built)
- Model 221A
- Model 200 and 221 changed into airliners
Details (Model 221)
- Crew: 1
- Capacity: 6
- Length: 41 ft 10 in (12.75 m)
- Wingspan: 59 ft 1 in (18 m)
- Height: ()
- Max. takeoff weight: 8,000 lb (3,628.7 kg)
- Powerplant: 1 × Pratt & Whitney Hornet B, 575 hp (428.8 kW)
- Maximum speed: 158 mph (254 km/h)
- Cruise speed: 135 mph (217 km/h)
- Range: 575 mi (925 km)
- Service ceiling: 14,700 ft (4,480.5 m)
- Boeing History - Boeing Monomail Transport Retrieved June 17, 2006.
- Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions.
- World Aircraft Information Files. London: Bright Star Publishing.