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Check Out This Pic  
User currently offlineIndianGuy From , joined Dec 1969, posts, RR:
Posted (13 years 7 months 3 weeks 5 days 4 hours ago) and read 1897 times:


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Photo © Bernard Charles



Do 747's really rotate this much? This one has barely missed striking its rear-end!

8 replies: All unread, jump to last
 
User currently offlineCfalk From , joined Dec 1969, posts, RR:
Reply 1, posted (13 years 7 months 3 weeks 5 days 2 hours ago) and read 1732 times:

If you watch a takeoff, the rotation angle clears the runway, the plane lifts off, and the plane can increase the angle imediately afterwords. This is especially true for long aircraft like a 737-800, which is long and low to the ground. I flew one today - liftoff is at a mild angle, which gets significantly steeper immediately afterwards.

Charles


User currently offlineBoeing727 From United States of America, joined May 1999, 954 posts, RR: 0
Reply 2, posted (13 years 7 months 3 weeks 5 days ago) and read 1694 times:

I guess so...

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Boeing727


User currently offlineXFSUgimpLB41X From United States of America, joined Aug 2000, 4200 posts, RR: 37
Reply 3, posted (13 years 7 months 3 weeks 5 days ago) and read 1657 times:

jets always rotate like that. The DC-10, for example, if it is light will rotate to 22 degrees. By the time you reach maximum rotation angle you are already a ways into the air.


Chicks dig winglets.
User currently offline747-600X From United States of America, joined Jan 2000, 2790 posts, RR: 14
Reply 4, posted (13 years 7 months 3 weeks 4 days 23 hours ago) and read 1625 times:

Does anyone know the rotation angle of jets on the ground before they have a tailscrape - the 777-300 or 757-300 perhaps? (I would ask about the 737-900 but that's probably about 2 degrees...)


"Mental health is reality at all cost." -- M. Scott Peck, 'The Road Less Traveled'
User currently offlineAJ From Australia, joined Nov 1999, 2391 posts, RR: 24
Reply 5, posted (13 years 7 months 3 weeks 4 days 18 hours ago) and read 1525 times:

If the angle of rotation of an aircraft is limited by the aircraft fuselage it is known as 'geometrically limited'. Boeing has installed higher undercarriage on the B737NG and B767-400 to allow a higher rotation attitude. Boeing has suffered from this before, the Boeing 707 could not be stretched further due to being geometrically limited, whereas the competition, Douglas' DC-8, had the p[otential to be stretched, and it was!
 Smile/happy/getting dizzy


User currently offlineThomacf From United States of America, joined Sep 2000, 542 posts, RR: 0
Reply 6, posted (13 years 7 months 3 weeks 4 days 17 hours ago) and read 1509 times:

I saw evidence of a 727 scraping the ground at Cleveland Burke-Lakefront. The tailscrape looked pretty beat-up and the co-pilot said it had been hit the week before when it took-off out Cleveland Burke-Lakefront.

User currently offlineGmonney From Canada, joined Jan 2001, 2159 posts, RR: 20
Reply 7, posted (13 years 7 months 3 weeks 4 days 17 hours ago) and read 1497 times:

WOW, I never knew it was soo close, is there not something to prevent the tail from hitting or not. There should be, it could be potentialy dangerous,

Nice pics though!!




Drive it like you stole it!
User currently offlineCfalk From , joined Dec 1969, posts, RR:
Reply 8, posted (13 years 7 months 3 weeks 4 days 8 hours ago) and read 1431 times:

Gmonney,

Yes it can be dangerous, but generally not immediately disasterous. A hard tail strike can bend the frame and pop some rivits. If a pressurized part of the aircraft is struck, then the pilots will soon know when their pressurization systems start giving funny readings, and they can turn around. Otherwise, if the tailstrike is not properly fixed, the bent components and popped rivits and welds will cause rapid fatigue and possible failure sometime in the future. I have never heard of a tailstrike causing a disaster on the same flight. The important thing is that is reported and fixed.

The JAL 123 accident, as I recall, was caused by some damage done previously to the tail (I think it was a tailstrike). The repair job was not properly done, and the new rivits were put in places where they would fatigue rapidly, which is eventually what happened, killing over 500 people

Many planes have some sort of rudementary tail skid, made of hardwood or maybe metal. It will protect the plane from damage from very slight tailstrikes, but generally, if there is a tailstrike, however minor, the airlines are required to make a close inspection of the tail.

Cheers,

Charles


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