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Landing Gear  
User currently offlineLeigh Pilgrim From United Kingdom, joined Dec 2000, 392 posts, RR: 0
Posted (14 years 3 weeks 22 hours ago) and read 1221 times:

Dear all,

Why does the 757 main landing gear tilt one way, and the 767 main gear tilt the other way?

Also, Why does the A321 have 4 wheel main undergarage and the 757 which I think is the equivelent have eight?, is it something to do with the weight?




4 replies: All unread, jump to last
User currently offline777236ER From , joined Dec 1969, posts, RR:
Reply 1, posted (14 years 3 weeks 22 hours ago) and read 1181 times:

757 is heavier than the A321

There are lots of topics on the other subject, go search for them. The reason is due to the touch-down characteristics of the aircraft, NOT to the size and position of the gear bays (as some think)

User currently offlineFDXmech From United States of America, joined Mar 2000, 3251 posts, RR: 30
Reply 2, posted (14 years 3 weeks 21 hours ago) and read 1161 times:

Actually, it allows the gear to fit into the wheelwell during retraction.

You're only as good as your last departure.
User currently offlineShaun3000 From United States of America, joined Mar 2002, 445 posts, RR: 0
Reply 3, posted (14 years 3 weeks 10 hours ago) and read 1106 times:

Yup. The tilt of landing gear bogies usually has alot to do with how it fits in the wheel well.

And A321 is much lighter than the B757, thus it only needs two wheels on its mains instead of four. As a general rule, the more wheels you have, the heavier a plane is. Weight limits at airports are per tire. So if you are very heavy, all you need do is put on lots of wheels so as to distribute the weight over a larger area, thus reducing the weight at any given point. This is the same principle as laying on a bed of nails. If you lay on one nail, it impales you. However, the more nails you lay on, the less pressure each individual nail applies on you skin, eventually reaching the point where they won't even puncture the skin.

Get it? Good.  Smile

User currently offlineLuzezito From Spain, joined May 2001, 270 posts, RR: 0
Reply 4, posted (14 years 3 weeks 8 hours ago) and read 1080 times:

Shaun. Perfect explanation!

Quoniam Vita Brevis Est, Propera!
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