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B-52 Front Wheel Steering  
User currently offlineScooter01 From Norway, joined Nov 2006, 1202 posts, RR: 8
Posted (7 years 4 months 2 days 7 hours ago) and read 3996 times:
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After studying all the head on pictures in the database of the B-52 making a turn while taxiing, something seems wrong with the wheel alignment. Normally on a vehicle with 2 front wheels, the inner one in a turn will be turned sharper than the outer one since the outer one will have a slightly larger turn-radius or covering a larger circumference (what is called toe-out in cars)
Most of the pics of the B-52s seem to show that the outer front wheelset is turned sharper than the inner one, (toe-in) therefore creating quite a bit of tire-scrubbing and the wheelsets working against each other.

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Photo © Gerhard Plomitzer


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Photo © Stuart Haigh - topjetpix


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Photo © Mark McEwan



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Photo © Rez Manzoori - FlightLineImages


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Photo © John Powell



Any comments?

Scooter


"We all have a girl and her name is nostalgia" - Hemingway
7 replies: All unread, jump to last
 
User currently offlineBoeingFixer From Canada, joined Jul 2005, 530 posts, RR: 0
Reply 1, posted (7 years 4 months 2 days 7 hours ago) and read 3972 times:

EDIT: I just re-read your post and you were commenting on the appearance of toe-in on the outside gear. I believe the steering angles are the same between both gear so this is most likely an optical illusion.

Cheers,

John

[Edited 2007-05-02 00:38:29]


Cheers, John YYC
User currently offlineScooter01 From Norway, joined Nov 2006, 1202 posts, RR: 8
Reply 2, posted (7 years 4 months 2 days 6 hours ago) and read 3955 times:
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To BoeingFixer.

I read your reply before the edit and I agree 100% with the "no toe-out on the front wheel sets during a cross-wind crab-landing", but I find it hard to believe that in the 50+ years since the design was conceived they haven't come up with some kind of computerised wheel control to rectify this problem.

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Photo © Justin Cederholm



Then again, why spend any money on a plane that will de retired in the next 25-30 years.  duck 

Scooter



"We all have a girl and her name is nostalgia" - Hemingway
User currently offlineStarlionblue From Greenland, joined Feb 2004, 17030 posts, RR: 67
Reply 3, posted (7 years 4 months 2 days 3 hours ago) and read 3910 times:

Quoting Scooter01 (Reply 2):

I read your reply before the edit and I agree 100% with the "no toe-out on the front wheel sets during a cross-wind crab-landing", but I find it hard to believe that in the 50+ years since the design was conceived they haven't come up with some kind of computerised wheel control to rectify this problem.

Well, every ten years or so they say the BUFFs will be retired "real soon now". And yet here they still are. So maybe that's the reason. And maybe scrubbing the tires is just less money that fixing the problem with a computer.



"There are no stupid questions, but there are a lot of inquisitive idiots."
User currently offline2H4 From United States of America, joined Oct 2004, 8955 posts, RR: 60
Reply 4, posted (7 years 4 months 2 days 1 hour ago) and read 3860 times:
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Quoting Scooter01 (Reply 2):

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Photo © Justin Cederholm


Why did they mount brand-new tires on a museum aircraft?



Signed,

The Russians





Intentionally Left Blank
User currently offlineDH106 From United Kingdom, joined Jun 2005, 626 posts, RR: 1
Reply 5, posted (7 years 4 months 1 day 16 hours ago) and read 3781 times:

Quoting Scooter01 (Reply 2):
"no toe-out on the front wheel sets during a cross-wind crab-landing"

Yes - just to clarify, there's 2 different modes for wheel pivoting on the B-52:- conventional steering for taxiing etc. which presumably just turns the fronts and thus should logically be designed to have each front turn at a slightly different angle - a la car setup, - and secondly, the 'crabbed crosswind' landing capability in which both fronts and rears pivot - all to the same angle so that they're aligned to approximately the ground track direction with the fus. at a crab angle at touchdown.



...I watched c-beams glitter in the dark near the Tanhauser Gate....
User currently offlineScooter01 From Norway, joined Nov 2006, 1202 posts, RR: 8
Reply 6, posted (7 years 4 months 1 day 4 hours ago) and read 3648 times:
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Quoting 2H4 (Reply 4):
Why did they mount brand-new tires on a museum aircraft?

Or should we say: Why would they re-tire a retired aircraft?
Big version: Width: 1024 Height: 1536 File size: 1106kb

MIG-25 in Riga


Scooter



"We all have a girl and her name is nostalgia" - Hemingway
User currently offlineRwy04LGA From United States of America, joined Jul 2005, 3176 posts, RR: 8
Reply 7, posted (7 years 3 months 4 weeks 1 day 1 hour ago) and read 3442 times:

Quoting DH106 (Reply 5):
the 'crabbed crosswind' landing capability in which both fronts and rears pivot - all to the same angle so that they're aligned to approximately the ground track direction with the fus. at a crab angle at touchdown.

The cross-wind crabbed landing gear was a military secret for many years. My Dad flew BUFFs and never told me about them until after that information was declassified.



Just accept that some days, you're the pigeon, and other days the statue
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