Boeing Model 40

__NOTOC__infobox Aircraft
name = Boeing Model 40
type = Mail plane
manufacturer = Boeing



caption =
designer =
first flight = 20 July 1925
introduced = 1 July 1927
retired =
status =
primary user =
more users =
produced =
number built = ca. 80
unit cost =
variants with their own articles = The Boeing Model 40 was a United States mailplane that became the first aircraft built by the Boeing company to carry passengers. It was of conventional biplane configuration with a combination of standard and warren-truss style interplane struts. Originally designed to compete for a US Mail contract in 1925, it was rejected in favour of the Douglas M-2.

The design was revived in 1927 as part of Boeing's tender for newly-privatised airmail routes. Designated the Model 40A, this variant was powered by an air-cooled Pratt & Whitney Wasp radial engine, which offered a 200 lb weight saving over the water-cooled Liberty specified by the postal service in 1925. Although the primary purpose of the aircraft was to carry mail, two passengers could be accommodated in the small cabin, allowing Boeing to operate it on any of the routes that the firm might bid for. The original fuselage design was changed to one using welded steel tubing.

Boeing successfully bid on the San Francisco-Chicago route, and "Boeing Air Transport" commenced operations on 1 July 1927 with 24 Model 40As.

urvivors

As of February 17 2008, Boeing 40C S/N 1043 became the only airworthy example in the world. It also holds the title of the oldest flying Boeing in the world. In 1928, the aircraft was substantially damaged in a crash and was totally rebuilt by Pemberton and Sons Aviation in Spokane, Washington. [www.pembertonandsons.com] .

The Henry Ford Museum in Dearborn, Michigan, contains a 1927 Boeing 40B-2, number 285.

The Museum of Science and Industry in Chicago, Illinois has a 1928 Boeing Model 40-B on display in its Transportation Gallery. (N288)

Variants

* Model 40 - original 1925 design with Liberty engine
* Model 40A - revised 1927 design for BATC (25 built)
* Model 40B - Model 40As re-engined with Pratt & Whitney Hornet (19 converted). Redesignated 40B-2
** Model 40B-4 - revised Model 40B with seating for four passengers and other improvements (38 built)
*** Model 40B-4A - one Model 40B used as engine testbed by Pratt & Whitney
*** Model 40H-4 - four Model 40B-4s built by Boeing Canada
* Model 40C - Similar to Model 40B-4 but with Pratt & Whitney Wasp engine of Model 40A. (10 built, all later converted to Model 40B-4 standard) [http://www.vintageaircraft.org/news/2008%20-%2002_21%20-%20Boeing%2040C%20Flies%20For%20the%20First%20Time%20in%2080%20Years.html Boeing 40C Flies For the First Time in 80 Years] [http://www.leebottom.com/nordo/Archives/Feb%202008.htm This Just In]
* Model 40X - unique special-order machine similar to Model 40C with only two-passenger cabin and extra open cockpit forward of pilot's cockpit
* Model 40Y - unique special-order machine similar to Model 40X, but with Pratt & Whitney Hornet engine

pecifications (Model 40A)

aircraft specification
plane or copter?=plane
jet or prop?=prop
crew=1
capacity=2 passengers
length main=33 ft 2 in
length alt=10.12 m
span main=44 ft 2 in
span alt=13.47 m
height main=12 ft 3 in
height alt=3.73 m
area main=547 sq ft
area alt=50.82 m²
airfoil=
empty weight main=3,531 lb
empty weight alt=1602 kg
loaded weight main=
loaded weight alt=
useful load main=
useful load alt=
max takeoff weight main= 6000 lb
max takeoff weight alt=2722 kg
more general=
engine (jet)=
type of jet=
number of jets=
thrust main=
thrust alt=
thrust original=
afterburning thrust main=
afterburning thrust alt=
engine (prop)=Pratt & Whitney Wasp
type of prop=
number of props=1
power main= 420 hp
power alt=313 kW
power original=
max speed main= 128 mph
max speed alt=206 km/h
cruise speed main= 105 mph
cruise speed alt=169 km/h
stall speed main=
stall speed alt=
never exceed speed main=
never exceed speed alt=
range main= 650mi
range alt=1046 km
ceiling main= 14,500 ft
ceiling alt=4420 m
climb rate main=
climb rate alt=
loading main=
loading alt=
thrust/weight=
power/mass main=
power/mass alt=
more performance=

References

*
* [http://www.boeing.com/history/boeing/40a.html Boeing History - Boeing Model 40A Commercial Transport] Retrieved June 17 2006.

ee also

* [http://www.airventure.org/2008/news/080417_boeing40.html One-of-a-Kind Restored Boeing 40 Flying To AirVenture (2008, Oshkosh, Wi. Photos included)]
* [http://link.brightcove.com/services/player/bcpid1184434145?bclid=1184431670&bctid=1618638475 Prelude to AirVenture appearance, 7 minute video, accessed 8 August 2008]
* [http://www.barnstormers.com/eFLYER/2008/031-eFLYER-FA01-Sept10.html Pemberton-Tobin-Scott transcontinental air mail re-enactment]

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