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Why Boeing Numbers Their Planes 7_7  
User currently offlineDstefanc From United States of America, joined Dec 2001, 63 posts, RR: 3
Posted (9 years 2 months 3 weeks 1 day 5 hours ago) and read 4913 times:

Hi. I don't know if this question was asked before; I couldn't find anything in the search. Sorry if this circled through the forums before. Anyways, do any of You know how the whole 7_7 numbering of Boeing planes started, what the significance behind that is, ect. Also, at the same time the whole Airbus thing with 3_0 (usually, excluding 319, 318, ....). Thx a lot in advance for the replies.

Damian

22 replies: All unread, jump to last
 
User currently offlineAeroWesty From United States of America, joined Oct 2004, 20322 posts, RR: 63
Reply 1, posted (9 years 2 months 3 weeks 1 day 5 hours ago) and read 4897 times:

It was derived from the registration number of the prototype: N70700


International Homo of Mystery
User currently offlineGoboeing From United States of America, joined Jun 2000, 2679 posts, RR: 14
Reply 2, posted (9 years 2 months 3 weeks 1 day 4 hours ago) and read 4779 times:

I do not remember where I read this, but 700 was the series of Boeing's commercial aircraft. Maybe 300 could be missiles, 400 could be space equipment, etc. Bill Boeing added 7 to 700 for good luck and that was the 707.

Nick


User currently offlineLeanOfPeak From United States of America, joined Oct 2004, 509 posts, RR: 1
Reply 3, posted (9 years 2 months 3 weeks 1 day 4 hours ago) and read 4752 times:

Hearsay has it that 707 is derived from one-half the square root of 2, which is the sine and cosine of 45 degrees, which may or may not have been the originally-intended wing sweep angle. Then they liked the 7's and stuck with them.

Whether any of this makes any sense is up to you.


User currently offlineAeroWesty From United States of America, joined Oct 2004, 20322 posts, RR: 63
Reply 4, posted (9 years 2 months 3 weeks 1 day 3 hours ago) and read 4738 times:

Bah, the cobwebs in my brain need sweeping.
Airline interest was somewhat slow in coming, however, so Boeing officials looked to give the project a new, more memorable name. The Model 367-80 had never been intended as anything more than an internal designation. Models in the 500s had been reserved for gas turbine engines and the 600 series for missiles. The 700 series was again intended for aircraft, so the company board decided to officially christen the Dash-80 as the Model 707.

There's more here:

http://www.aerospaceweb.org/question/planes/q0134.shtml



International Homo of Mystery
User currently offlineHAWK21M From India, joined Jan 2001, 31573 posts, RR: 57
Reply 5, posted (9 years 2 months 3 weeks 1 day 3 hours ago) and read 4722 times:

Bill Boeing added 7 to 700 for good luck and that was the 707.


Arn't We glad he did  Smile
regds
MEL



Think of the brighter side!
User currently offlineNewark777 From United States of America, joined Dec 2004, 9348 posts, RR: 30
Reply 6, posted (9 years 2 months 3 weeks 1 day 3 hours ago) and read 4707 times:

Hearsay has it that 707 is derived from one-half the square root of 2, which is the sine and cosine of 45 degrees, which may or may not have been the originally-intended wing sweep angle. Then they liked the 7's and stuck with them.

That's pretty interesting. The numbers work out, but I'm not sure if that is why they chose 707.

Harry



Why grab a Heine when you can grab a Busch?
User currently offlineSkydrol From Canada, joined Oct 2003, 931 posts, RR: 10
Reply 7, posted (9 years 2 months 3 weeks 1 day 3 hours ago) and read 4704 times:

Seems this series of numbers is popular elsewere too...

Swingline has a series of common staplers numbered 747, 767 etc.

Solomon made ski bindings 727, 737, 747, 757, 777 etc.

Sharp made a series of boomboxes GF-767, GF-777, GF-787



Boeing isn't the only company with product line model numbers like this!


Anyone know any others?


LD4



∙ ---{--« ∙ ----{--« ∙ --{-« ∙ ---{--« ∙ --{--« ∙ --{-« ∙ ----{--« ∙
User currently offlineLincoln From United States of America, joined Nov 2004, 3887 posts, RR: 8
Reply 8, posted (9 years 2 months 3 weeks 1 day 3 hours ago) and read 4645 times:

So I'm not the only one who noticed the Swingline 767  Smile

Every time I have to (*shudder*) manually staple something (usually when the photocopier is out of staples) I wonder if it's just a coincidence Big grin

Lincoln

[Edited 2005-01-29 08:03:15]


CO Is My Airline of Choice || Baggage Claim is an airline's last chance to disappoint a customer || Next flts in profile
User currently offlineDstefanc From United States of America, joined Dec 2001, 63 posts, RR: 3
Reply 9, posted (9 years 2 months 3 weeks 1 day 2 hours ago) and read 4633 times:

Thank You so much for all the feedback.

Damian


User currently offlineMoose135 From United States of America, joined Oct 2004, 2243 posts, RR: 11
Reply 10, posted (9 years 2 months 3 weeks 15 hours ago) and read 4403 times:

Hearsay has it that 707 is derived from one-half the square root of 2, which is the sine and cosine of 45 degrees, which may or may not have been the originally-intended wing sweep angle. Then they liked the 7's and stuck with them.

That's the story I heard 30-odd years ago, and never heard anything else that sounded remotely believable.

Moose



KC-135 - Passing gas and taking names!
User currently offlineThrust From United States of America, joined Sep 2003, 2686 posts, RR: 10
Reply 11, posted (9 years 2 months 3 weeks 14 hours ago) and read 4313 times:

GoBoeing is absolutely correct. In my "Boeing Jetliners" book, Boeing explicity states that they originally were going to call the 707 the 700, but since 7 is a mystical number and since it sounded better, the name 707 was substituted for 700. Thus came the 727, 737, 747, 757, 767, 777, and now 787  Smile/happy/getting dizzy


Fly one thing; Fly it well
User currently offlineOzzie From United States of America, joined Feb 2004, 338 posts, RR: 0
Reply 12, posted (9 years 2 months 3 weeks 14 hours ago) and read 4298 times:

When I was on the tour of Everett a couple of years back the tour guide driving the bus around the pre-delivery dock area was asked this same question, and she too gave the answer that 7 was seen as a mystical, and lucky number not necessarily by the engineers but the public as well.

Oz


User currently offlineOldAeroGuy From United States of America, joined Dec 2004, 3423 posts, RR: 67
Reply 13, posted (9 years 2 months 3 weeks 14 hours ago) and read 4256 times:

Goboeing's reply is correct.


Airplane design is easy, the difficulty is getting them to fly - Barnes Wallis
User currently offlineFCKC From France, joined Nov 2004, 2348 posts, RR: 4
Reply 14, posted (9 years 2 months 3 weeks 13 hours ago) and read 4190 times:

Nice to know the story behind this number 7.

For Airbus it's more simple.
The first plane was a 300 seats plane , so Airbus + 300 = A300





User currently offlineWilcharl From United States of America, joined Jun 2000, 1160 posts, RR: 3
Reply 15, posted (9 years 2 months 3 weeks 12 hours ago) and read 4123 times:

Every Boeing model has had the # 7 associted with it... I have brought this up many times before... its a mystical thing... even the military products...
B-52..... 5+2=7
B-29..... 9-2=7
KC-135..... 5+3-1=7 or its Boeing Int. Designation of 717
B-17
CH-47


User currently offlineLTBEWR From United States of America, joined Jan 2004, 12878 posts, RR: 12
Reply 16, posted (9 years 2 months 3 weeks 12 hours ago) and read 4103 times:

The number 7 is considered very lucky in many cultures, especially in Asia. As to the staplers, they just copied the names from the Boeing a/c models as sounded so 'jet age'. I have a '767' model Swingline stapler on my desk.

User currently offlineAv8trxx From United States of America, joined Nov 2001, 657 posts, RR: 6
Reply 17, posted (9 years 2 months 3 weeks 10 hours ago) and read 3978 times:

The Boeing historian Mike Lombardi replied to my Email about this very subject a few years ago. He told me that the marketing department was responsible for the 7x7 designators with the birth of the "707" as they thought the illiteration of the format was very favorable, in addition to sevens being 'lucky' and -700 series for commercial a/c concepts. The mathematics idea about the 707s wing was nice, but someone showed how it didn't truly work out and it's an urban legend. (Can't find it right now.) However, here's an excerpt about this topic-

Whatever happened to the 717?
by Ed Brown
Fortune magazine; 2/2/1998

Boeing announced in early January that it is rechristening the McDonnell Douglas MD-95 as the Boeing 717-200. But why wasn't there already a 717 in the skies? There's the 707, the 727, the 737.... The gap hints of an Edsel-like disaster in the company's past. But it's not that. The first 717 had its day--as a military cargo and airborne-refueling plane called the KC-135.

In the early days, says Boeing historian Mike Lombardi, the company numbered its products sequentially, starting with 1. Boeing kept this up until the 1950s, when it assigned a set of numbers to each of its product lines--600 for missiles, 700 for commercial jets, etc. Every significant initiative within a given series, even if it was just a sketch, got a number, which explains why Boeing's first commercial airliner, unveiled in 1954, was not the 700 but the 707. Then the marketers decided they liked the palindromic ring of "707" so much that every 700-series jet name would end with 7.

The prototype that produced the 707 also spawned a military jet, which was marketed as the 717. Once the U.S. Air Force renamed the plane according to its own classification system, however, everyone--including the folks at Boeing--started calling it the KC-135. Boeing stopped making the plane in 1965, but about 550 of them are still in use by the Air Force. "



User currently offlineSolnabo From Sweden, joined Jan 2008, 847 posts, RR: 2
Reply 18, posted (9 years 2 months 3 weeks 10 hours ago) and read 3932 times:


So when do we see B 7-11 in the sky?

F/a s w junkfood : peanutbuttersanwiches and cold coffee maybe some KoolAid  Big thumbs up

Micke  Smokin cool *kidding*



Airbus SAS - Love them both
User currently offlineFrontiers4ever From United States of America, joined Dec 2003, 173 posts, RR: 0
Reply 19, posted (9 years 2 months 3 weeks 10 hours ago) and read 3654 times:

yeah the Boeing 7-11 could becalled the Quicky Mart.

-Frontiers4ever



Until you prove, your right, your wrong
User currently offlineJulius2005 From Cuba, joined Sep 2004, 18 posts, RR: 0
Reply 20, posted (9 years 2 months 3 weeks 7 hours ago) and read 2869 times:

Its been very interesting hear about the meaning of 707 designations for boeing`s a/c


JRHAV
User currently offlineVirgin747 From Canada, joined Oct 1999, 317 posts, RR: 0
Reply 21, posted (9 years 2 months 3 weeks 7 hours ago) and read 2763 times:

I heard the 707 was called because it was the 707th design of the plane. How the rest was is a mystery to me...

User currently offlineAreopagus From United States of America, joined Sep 2001, 1368 posts, RR: 1
Reply 22, posted (9 years 2 months 3 weeks 6 hours ago) and read 2724 times:

Every Boeing model has had the # 7 associted with it... I have brought this up many times before... its a mystical thing... even the military products...
B-52..... 5+2=7
B-29..... 9-2=7
KC-135..... 5+3-1=7 or its Boeing Int. Designation of 717

Oh, come now.

B-17
CH-47

Also the 307 airliner, the B-47 bomber, the KC-97 tanker, and the Vertol 107 (=CH-46) helicopter.


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