pilotaydin
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How The Boeing 707 Was Named...

Fri Dec 10, 2004 6:00 am

Does anyone know how this came about? I heard during my school days that the 707 was named after the COSINE of the wing root angle with the body, which seems to be 45 degrees... and the cosine of 45 is 0.707

anybody know if this is true or not?
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spacecadet
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Joined: Thu Sep 20, 2001 3:36 am

RE: How The Boeing 707 Was Named...

Fri Dec 10, 2004 7:04 am

anybody know if this is true or not?

Definitely not.

Boeing has internal product numbers for all of their products, from 100 to I think 900. The 700 series is the series number for passenger aircraft. The 707 was the 7th design that they produced, hence 707.

Boeing liked the sound of "7X7" so they later kept it going for marketing purposes.

I couldn't tell you how the 720 name came about as a variation of the 707 (I probably knew at one point but forgot). But the 707 was the plane's literal Boeing product number, just based on Boeing's product coding system that had been in place for many years previous to its development.
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APFPilot1985
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RE: How The Boeing 707 Was Named...

Fri Dec 10, 2004 7:11 am

If thats the case then why was the kc-135 the original 717?
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invicta
Posts: 64
Joined: Thu Mar 14, 2002 12:56 pm

RE: How The Boeing 707 Was Named...

Fri Dec 10, 2004 9:57 am

Spacecadet - I think the 720 was orginally envisioned as 707-020, but it was shortened to 720.
 
TradewindL1011
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Joined: Wed Dec 10, 2003 2:41 pm

RE: How The Boeing 707 Was Named...

Fri Dec 10, 2004 10:41 am

Just to clarify a little bit. But the 700 range of numbers was actually reserved for passenger JET powered aircraft. Therefore making the 707 the first design of the new series of aircraft that Boeing offered. The gun was jumped to 707 from 700 because Boeing wanted to keep the same number tradition that they had been using, ending the model numbers with a 7 (e.g. 247, 307, 367, 377). Don't ask me why that was the case. Yes the internal designation for the KC-135 is in fact 717, but as the term was never used outside of Boeing, it was reused for Boeing's adopted 100 seater. As far as the 720 is concerned I heard that it was originally meant to be called the 707-200 (noting that the actual 707 series jumps from -100 to -300). I think (and correct me if I'm wrong) that Boeing finalized on the 720 because the aircraft had enough differences between itself and the true 707, that it should be distinguished as a different design, but not a full fledged new design, thus reserving the model 727 for a completely different aircraft.
 
L.1011
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RE: How The Boeing 707 Was Named...

Fri Dec 10, 2004 10:48 am

As far as the 720 is concerned I heard that it was originally meant to be called the 707-200 (noting that the actual 707 series jumps from -100 to -300). I think (and correct me if I'm wrong) that Boeing finalized on the 720 because the aircraft had enough differences between itself and the true 707, that it should be distinguished as a different design, but not a full fledged new design, thus reserving the model 727 for a completely different aircraft.

Right in most areas, wrong on 707-200. The 707-200 was a 707-100 with more powerful engines for hot and high operations. 5 were sold to Braniff.
 
57AZ
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Joined: Tue Nov 02, 2004 2:55 pm

RE: How The Boeing 707 Was Named...

Fri Dec 10, 2004 10:57 am

One thing that is true is the background behind the 367-80's designation. Boeing wanted to have as much of a lead on the competition in the development of a jet tanker and airliner as possible over its rivals-namely Douglas. To keep the project low profile as long as possible, they assigned it the 367-80 designation. Internal design number 367 was assigned to the airframe design for the 377/KC-97. By adding the -80 designation, anyone accidentally overhearing the model designation would naturally assume that the airplane was simply another variation of the 377/KC-97. It served its purpose, keeping the folks at Douglas blissfully unaware of Boeing's plans until it was too late.
"When a man runs on railroads over half of his lifetime he is fit for nothing else-and at times he don't know that."
 
GdJet16
Posts: 41
Joined: Fri Oct 29, 2004 5:52 am

RE: How The Boeing 707 Was Named...

Fri Dec 10, 2004 11:15 am

Also, i thoguth that the 707's wing sweep was 35 degrees, not 45...
I like the name 707 better then the Boeing 819  Smile (cos 35 =.819)
Ive heard that the 500 series was the designation for missles, and 600 for gas turbines...so 700 was reserved for commercial jets

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