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Scooter01
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B-52 Front Wheel Steering

Wed May 02, 2007 6:45 am

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
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boeingfixer
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RE: B-52 Front Wheel Steering

Wed May 02, 2007 7:33 am

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
 
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Scooter01
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RE: B-52 Front Wheel Steering

Wed May 02, 2007 8:02 am

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
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Starlionblue
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RE: B-52 Front Wheel Steering

Wed May 02, 2007 10:39 am

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.
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2H4
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RE: B-52 Front Wheel Steering

Wed May 02, 2007 1:15 pm




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


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DH106
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RE: B-52 Front Wheel Steering

Wed May 02, 2007 10:24 pm

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....
 
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Scooter01
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RE: B-52 Front Wheel Steering

Thu May 03, 2007 9:38 am

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?
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MIG-25 in Riga


Scooter
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rwy04lga
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RE: B-52 Front Wheel Steering

Sat May 05, 2007 1:35 pm

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.
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