PeopleMover

I have always wondered why the main landing gear trucks on the 767 are "tilted" forward instead of "backward" having the front mains touch before the rear. On all other aircraft that have more than one row of wheels on their mains, they are positioned so the rear wheels touch first. It would seem that having the back wheels touch first would reduce the stress on the main struts vs. having the front touch first. Does anyone know why the 767 main gear are positioned like this.

KALITTADXR

Its for CG..

UAL T38 Phlyer

On the 747, the "tilt" was soley designed so the gear wuold clear the rear-spar of the wing upon retraction.

It had the unintended benefit of making the wheels touch one-two-three instead of all at once, and made for smoother landings, even when I botched it...

I don't know if that is the case with the 767, but I would suspect it is--if not the wing-spar, then perhaps a fuselage structure--or even to fit within the wing-body fairing.

aa73

Actually, the gear tilt on the 767 is set up so that ALL main gear tires touch together. Think about it, with the aircraft in a nose up flare for landing and the main gear tilted downwards, results in a more or less level truck because the forward tilt is eliminated by the nose up attitude.

At least it results in pretty consistently smooth landings... The 757 is never as consistent.

73

IFlyEm

Is that why the 747 gear tilts?

UAL T38 Phlyer

Read my post above...they specifically said in 747 ground school it was to clear the rear spar, and a hydraulic damper held it in place to do so. If the hydraulic system failed, you could end up with hung gear or gear that would not retract.

I had to guess on the 767, as I was supposed to fly it, but haven't been to school yet..and now it looks like the Bus, if I'm lucky.

III Corps

You are correct. The 'dangle' is a factor of the gear wells thus they are different on the 757 and 767.

And it will take a while but you will enjoy the 'bus.

__________________
Simple solutions are seldom either.

UAL T38 Phlyer

III Corps:

Re: Different thread arguing Bus vs 737.

Got recalled last year and assigned the 767/757. Didn't go to school due to mil-leave. Previous airplane was the Bus, and I really like flying it. If I survive this furlough, will undoubtedly get the Bus.

And that is fine with me.

III Corps

I enjoyed the 757/767. Never thought about the gear but always tried to make sure I remembered whether to step up or down. It always un-nerves the pax when the Capt falls entering the cockpit.

I only flew domestic but a few times we took a 767-200ER to the coast. BANG! Right to max altitude! Both were remarkably easy to land. Shot a number of IIIBs into various fields and always amazed at the precision. Did it once at LAX and it took more time to get to the gate after landing that it did from the time we checked in on approach to touchdown.

Into every life comes a bit of pain. Never got furloughed but did lose my pension. Friend of mine never got furloughed, walked out with pension and wife hauled on him with just about everything. ??? some sort of cosmic balance???

Question. Is the FIRST EP in Section III still "STOP, THINK, COLLECT YOUR WITS" or has it been rewritten/deleted? When I started flying it was the cockpit. Now everyone calls it a flight deck. Back then they were 'drones'. Now they are UAVs. Seems the first thing is every generation needs new terms.

Best of luck dodging the bullet.

__________________
Simple solutions are seldom either.

afterburn81

Back when I was going to college I had a professor that had worked on some of the production of the 767 with Boeing (yup he was old). This was one of his trivia questions for the day.

His answer to the question was that back when the 1st 767's were designed, they were originally set with the mains tilting backwards just like the rest of the fleet. However, when they started flying the aircraft it had problems with the footprint and stresses on the taxi ways as well as runways specifically at NY's JFK. So the team re engineered the gear to sit a bit wider and the end result caused the gear to have to tilt forward for retraction/extension purposes.

Now this is just what we were told in class. The guy had nothing to gain by telling us false stories so I trust his credibility. But take it how you want.