What is Boeing Monomail?
{|{{Infobox Aircraft Begin |name = Model 200 and 221 Monomail |image = Image:Monomail.jpg |caption = A United Airlines Model 221 }}{{Infobox Aircraft Type |type = [[Airliner]] |manufacturer = [[Boeing]] |designer = |first flight = 6 May 1930 |introduced = |retired = 1933 |status = Retired |primary user = [[United Airlines]] |more users = <!--up to three more. please separate with <br/>.--> |produced = <!--years in production, e.g. 1970-1999, if still in active use but no longer built--> |number built = 2 |unit cost = |developed into=[[Boeing YB-9]] |variants with their own articles = }} |} The '''Boeing Model 200 Monomail''' was an [[United States|American]] [[mail plane]]. It was built in the 1930s by [[Boeing]]. It flew for the first time on 6 May 1930. The Boeing Monomail was a [[monoplane]] instead of a [[biplane]]. The wing was strong and did not need bracing. Its wheels could be [[:en:wikt:retract|retract]]ed. 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 [[airliner]]s ==Users== ;{{USA}} *[[Boeing Air Transport]] *[[United Air Lines]] ==Details (Model 221)== {{aircraft specs |ref= |prime units?=imp |genhide= |crew= One pilot |capacity = 6 passengers |length m = 12.75 |length ft = 42 |span m = 18 |span ft = 59 |height m= |height ft= |airfoil=Boeing 106 |empty weight kg= |empty weight lb= |gross weight kg= |gross weight lb= 8000 |m