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Thread: Boeing 7's?

  1. #31
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    Quote Originally Posted by F-3guy View Post
    Can you find and post a picture of the 5-engine version? I have heard about it but have not seen a photo.

    Boeing's website says that the center engine was mounted on the original (Dash 80) protoype to carry out systems testing for the 727. As for the origin of the 707 desingation, Boeing had gotten into the 400s with its previous aircraft. Designations in the 500s and 600s were reserved for missiles and other stuff like that, while the 700s remained open. Boeing had had commercial success in connection to the number 7, with the models 247, 307, 367, 377, and a few others. I hope this clears up the issue.
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  2. #32

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    Thanks. 1 question, though: Did they fit an S-duct (727 style), or did the engine just go straight through the tail fin (DC-10 style)?.

  3. #33

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    The Dash 80 was not the only 5-engined design to fly. In World War I, the Germans built a series of massive 5- and 6-engine bombers. A modified B-17 also flew with a turboprop engine in place of the bombardier's position, just to test the engine systems. One B-47 engine testbed even flew with a 7th engine tacked onto the rear fuselage.

  4. #34

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    The DC-5 actually did fly. Although Douglas only got 12 orders (because of WWII), the airplane did get off the ground and into operational use. As for measuring its commercial success, it went over like a lead balloon (or a hydrogen-filled zeppelin).

  5. #35
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    At the time the 700 series of Boeing aircraft were on the table, there were a whole slew of them for different purposes.
    As Darrell said, it had to start somewhere. I understand that since they would be jet powered they wanted to get away from the DC numbers such as the DC-3, DC-4, DC-5 (which did not fly), DC-6, DC-7, all with different models in each catagory.
    I am rather curious about how Boeing was getting away from using Douglas designations...

    Larry N.

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    Easy. They just crossed out "MD-95" on all the documentation and replaced it with "717".

  7. #37
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    Quote Originally Posted by BobK View Post
    Easy. They just crossed out "MD-95" on all the documentation and replaced it with "717".
    I think Larry was refering to the fact that Boeing and Douglas were a loooong way off from the merger when the B-700 series was born...
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  8. #38

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    This http://www.boeing.com/news/frontiers...i_history.html gives the Boeing explanation.

  9. #39
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    Quote Originally Posted by fxsttcb View Post
    I think Larry was refering to the fact that Boeing and Douglas were a loooong way off from the merger when the B-700 series was born...
    Exactly, Don. And even the McDonnell merger hadn't happened yet at that time.

    Larry N.

    As Skylab would say:
    Remember: Aviation is NOT an exact Science!

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