747400sp From United States of America, joined Aug 2003, 3914 posts, RR: 2 Posted (5 years 2 weeks 1 day 6 hours ago) and read 7481 times:
The T-7 looks like it could be a sibling to the Boeing twin 757/767, but I know it a different a/c, but I have reed that a 777 wings is similar to the 757/767 wings, and I know It has the same section 41 as a 767. So what parts of the 777 is related to the 757/767?
As far as I know, section 41 is the only major section shared with the 767, but not the 757. I would guess that there are at least some minor bits (fasteners, wires, etc) that are shared, and of course a good deal of the knowledge from previous projects made it to the 777 as well.
Why do Aerospace Engineering students have to turn things in on time?
MD11Engineer From Philippines, joined Oct 2003, 14476 posts, RR: 62
Reply 5, posted (5 years 2 weeks 18 hours ago) and read 7197 times:
Even the 757 and the 767 only have superficial similarity (the cockpits look similar and the indication systems and flight control input levers look the same), but at system level they are quite different and only share some avionics boxes.
KELPkid From United States of America, joined Nov 2005, 6554 posts, RR: 3
Reply 10, posted (5 years 1 week 3 days 10 hours ago) and read 6435 times:
Quoting FX772LRF (Reply 9): No, the type ratings would be different since the 767 is a predominately analog cockpit, while the 777 is a complete glass cockpit setup.
I'd love to know how you are claiming that one of the first civil aircraft to feature a glass cocpkit (the 767) is "a predominately analog cockpit" It does have a few more analog backup instruments than the T7, though...
Although it has an analog mach meter/airspeed indicator and altimeter, the PFD is probably the primary for normal flight. Note, too, that the combined HSI/Radio Magnetic Indicator is actually a CRT display.
The Engine instruments are all digital in the 767, too, and it has an electronic flight management system.
So no, all in all, not "predominately analog."
Celebrating the birth of KELPkidJR on August 5, 2009 :-)
In comparison to the 777 cockpit, I think most people would go "Oh hey, that's got a lot more analog instruments than the 777." if they'd looked into a 767 cockpit.
I think I didn't really get my point across. I meant to touch more on the fact that the 777 is a complete (minus some backup instruments) glass cockpit. All of your normal instruments, indicators, maps, checklists (not sure if this is used by itself or in addition to the paper checklists), and other cockpit instruments are included into the screens on the 777. The 767 doesn't have that. The two cockpits aren't necessarily worlds apart, they're more like countries apart, but they still are two separate type ratings. Which is all that c5load wanted to know.
Thank you KELPkid for the correction.
Cleared to IAH via CLL 076 radial/BAZBL/RIICE3, up to 3k, 7k in 10, departure on 134.3, squawk 4676, Colgan 9581.
DALMD88 From United States of America, joined Jul 2000, 2692 posts, RR: 14
Reply 12, posted (5 years 1 week 3 days 7 hours ago) and read 6395 times:
The 777 and the 767-400 have very similar cockpit configs. If an operator wanted to they could spend the money and make the 767-300 digital cockpit look like the 777 digital cockpit. The big change is from CRT to LCD screens. Even with simlar cockpit setups they would still be different type ratings. The -400 requires a differences class from the -300 type.
From an avionics standpoint the 777 has a larger databus system. I think it is twice as big as the 767. It was also the first Boeing to use fiber optic wiring in some systems. I've heard they moved away from fiber optic with the 787. It is just too hard to repair in the field.
On the airframe I think the only other common is the cabin windows were also used on the 767-400. My guess is the fuel tank plates are the same as used on the 767. Other than that I doubt there are many true major common parts.
LMP737 From United States of America, joined May 2002, 4743 posts, RR: 22
Reply 13, posted (5 years 1 week 2 days 18 hours ago) and read 6205 times:
Quoting DALMD88 (Reply 12): It was also the first Boeing to use fiber optic wiring in some systems. I've heard they moved away from fiber optic with the 787. It is just too hard to repair in the field.
I'm not a 100% sure about this but later model 777's have the fiber optics deleted. Like you said, to hard to fix in the field.