Aerodynamics question...

Rommey

Rommey

Well-Known Member
The commercial version of the 717 (similar in design to the DC-9/MD-8X) is actually the second airframe with that designation. The original Model 717 is actually the KC-135 (and all the C-135 variants).

In August 1954, the USAF announced that it intended to procure a number of tanker/transports developed from the prototype Boeing Model 387-80 which had first flown a few weeks earlier. These were allocated the designation KC-135A, and the first of them made its initial flight on 31 August 1956...[snip]...This military version of the Model 367-80 is identified as the Boeing Model 717
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When Boeing began the 707 project in the early 1950s, the company gambled on the expensive and ambitious program hoping that the US military would also purchase the design as a jet-powered refueling tanker. The gamble paid off when, in 1954, the US Air Force announced its decision to purchase the 707 as a tanker and transport. The resulting Boeing 717, better known as the KC-135 and C-135, has become one of the most widely used and flexible aircraft in the Air Force inventory since its inception in the mid-1950s.
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ylexot

ylexot

Super Genius
blacklabman said:
The Boeing 707 got designated that because the wing's aspect ratio is 7.07. The aspect ratio is based upon wing area, span, and chord. The higher the aspect ratio the more efficient the wing. This was a test question during aero-performance class.

The later series of Boeing liners were a logical progression of the 707.

I don't know what happened to the 717.
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Well then, your teacher was wrong too according to Boeing...
Boeing Frontiers Online
 
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