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747s And 707s Have Same Wheels (! /?)  
User currently offline747-600X From United States of America, joined Jan 2000, 2829 posts, RR: 13
Posted (16 years 3 months 3 weeks 4 days 15 hours ago) and read 1342 times:

I heard that someone got an award for designing the 747's wheel arrangement, since no one had ever done anything on that scale before. I also heard that the 747s wheels are the same as those on the 707. 2 questions: If this is true, are the trucks the same as well? Who designed the 747's wheels, and what do you reckon he puts on his passport, "Landing Gear Designer"?

Thanks for any insights!!

5 replies: All unread, jump to last
User currently offlineAsqx From United States of America, joined Jun 1999, 630 posts, RR: 0
Reply 1, posted (16 years 3 months 3 weeks 4 days 14 hours ago) and read 1262 times:

The 747 landing gear was desgined to have the same pressure footprint as the 707. What this means is that each tire puts the same amount of pressure on the runway surface per square inch as on the 707. That way any runway that could withstand the 707 and not crack could support the 747 without being thickened.

I think the tires are the same, or pretty close, but the trucks are different becuase although the tires support the same load, the trucks have a much greater load to carry.

The guy who designed them probably put aerospace engineer on his passport.


User currently offlineLH423 From Canada, joined Jul 1999, 6501 posts, RR: 52
Reply 2, posted (16 years 3 months 3 weeks 4 days 10 hours ago) and read 1247 times:

I believe they are the same bogies, to keep similar commonality, especially when most of the initial customers for the 747 were already 707 customers, ie PanAm, TWA, American, BOAC, etc.


« On ne voit bien qu'avec le cœur. L'essentiel est invisible pour les yeux » Antoine de Saint-Exupéry
User currently offlineHmmmm... From Canada, joined May 1999, 2114 posts, RR: 5
Reply 3, posted (16 years 3 months 3 weeks 4 days 9 hours ago) and read 1242 times:

Hmmmm... . I understand the 747-400 to have about 3+ x the MGTOW of a 707 which is really just a slightly longer 727. And the 707 has 8 rear wheels. The 747 has only twice that number, 16 rear wheels. That would mean that it has twice the number of tires to support 3 x the load. Then the pressure per sq. inch could not be the same. It would be greater. What am I missing?


An optimist robs himself of the joy of being pleasantly surprised
User currently offlineVC-10 From United Kingdom, joined Oct 1999, 3727 posts, RR: 32
Reply 4, posted (16 years 3 months 3 weeks 1 day 13 hours ago) and read 1230 times:
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The -100 wheels are the same. -200 & on are bigger.

User currently offlineJetRanger2000 From United States of America, joined Feb 2000, 230 posts, RR: 0
Reply 5, posted (16 years 3 months 3 weeks 1 day 11 hours ago) and read 1224 times:

The Wings on the 747 are also modified 707 wings

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