boeingb40

7 photos tagged boeingb40, from 1 member of Flickr Commons.

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4
2013

 

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AL13_Air Mail Pioneers Photo_000094

from SDASM Archives

  • embarrassed squirrel said:
    Modified Model 40.
  • TVL1970 said:
    This is the first Boeing Model 40 as originally powered by the (US Government-specified) Liberty L-12 engine.

AL13_Air Mail Pioneers Photo_000070

from SDASM Archives

  • embarrassed squirrel said:
    Modified Model 40.
  • TVL1970 said:
    This is a (relatively rare) photo of the original Boeing Model 40 powered by a (by 1925, heavy and inefficient) Liberty Engine - as specified by the US government, which had hundreds of surplus Liberty L-12 engines from World War I production. The aircraft was designed and built to compete for US Post Office Air Mail service contract for 50 aircraft. Ultimately, the Douglas M-2 would get the contract. However, an improved Boeing Model 40, the Boeing Model 40A, would provide the impetus for the development and production of the Pratt & Whitney Wasp radial engine, as well as representing Boeing's start in building airliners. See: www.avsim.com/pages/0809/GAS/B40.htm en.wikipedia.org/wiki/Boeing_Model_40

AL13_Air Mail Pioneers Photo_000087

from SDASM Archives

  • TVL1970 said:
    The first Boeing Model 40.