Boeing Unveils Its Jumbo Killer

[PBRstreetgang]

ETOPS change?

 

[Microclimates]

on the plus side it should be fairly obvious when a wing-folding mechanism needs mx!

 

[zawillif]

I'm pretty sure the engineering team at Boeing Commercial Airplanes knows a good deal more about the pros and cons of folding wings than the likes of us.

Also, the engine will have a higher bypass ratio due to a much smaller core. I believe the outer dimensions will be close to the GE90. Although I don't have the figures in front of me.

 

[Secret Squirrel]

I'm pretty sure the engineering team at Boeing Commercial Airplanes knows a good deal more about the pros and cons of folding wings than the likes of us.

I would have thought the same about lithium-ion batteries.

 

[DUBLINFLYER]

GE 90 engine Info

The following is mindless information for those who have nothing to do today. (I'm having a slow day too)
The first General Electric-powered Boeing 777 was delivered to British Airways on November 12, 1995;[11] the aircraft, with two GE90-77Bs, entered service five days later.[12] Initial service was affected by gearbox bearing wear issues, which caused the airline to temporarily withdraw its 777 fleet from transatlantic service in 1997.[12] British Airways' aircraft returned to full service later that year,[13] and General Electric subsequently announced engine upgrades.
Records[edit]

According to the Guinness Book of Records, at 127,900 pounds-force (569 kN)f, the engine holds the record for the highest thrust (although rated at 115,300 pounds-force (513 kN)f). This thrust record was accomplished inadvertently as part of a one-hour, triple-red-line engine stress test. In order to accommodate the increase in torsional stresses an entirely new steel alloy (GE1014) had to be created and then machined to extreme tolerances.[14] The new record was set during testing of a GE90-115B development engine at GE Aviations' Peebles Test Operation, which is an outdoor test complex outside Peebles, Ohio. It eclipsed the engine's previous Guinness world record of 122,965 pounds-force (546.98 kN).[15]
On November 10, 2005, the GE90 entered the Guinness World Records for a second time. The GE90-110B1 powered a 777-200LR during the world's longest flight by a commercial airliner, though there were no fare-paying passengers on the flight, only journalists and invited guests. The 777-200LR flew 13,422 miles (21,601 km) in 22 hours, 42 minutes, flying from Hong Kong to London "the long way": over the Pacific, over the continental U.S., then over the Atlantic to London.[16] (The longest flight by a commercial airliner with passengers is 18.5 hours, flown by an Airbus A340-500 aircraft on a daily non-stop flight from New York to Singapore on Singapore Airlines. See Singapore Airlines Flight 21)
Variants
GE90-76B rated at 76,000 lbf (338.1 kN)
GE90-77B rated at 77,000 lbf (342.5 kN)
GE90-85B rated at 85,000 lbf (378.1 kN)
GE90-90B rated at 90,000 lbf (400.3 kN)GE90-92B rated at 92,000 lbf (409.2 kN)
GE90-94B rated at 93,700 lbf (417 kN)
GE90-110B1 rated at 110,100 lbf (489.3 kN)
GE90-115B rated at 115,300 lbf (514 kN)Specifications (GE90-115B)[edit]


General characteristics

• Type: axial flow, twin-shaft, bypass turbofan engine
• Length: 287 in (7,290 mm)[19]
• Diameter: overall: 135 in (3.429 m);[19] fan: 128 in (3.251 m)
• Dry weight: 18,260 lb (8,283 kg)[19]

Components

• Compressor: axial: 1 wide chord swept fan, 4 low pressure stages, 9 high pressure stages
• Turbine: axial: 6 low pressure stages, 2 high pressure stages

Performance

• Maximum thrust: max at sea level: 115,300 lbf (514 kN) ; world record set at 127,900 lbf (568,9 kN) 827 feet above sea level
• Overall pressure ratio: 42:1
• Thrust-to-weight ratio: approx. 6.3:1

 

[JetMonkey]

This is Boeing's last chance to....

GET RID OF THE FREAKIN YOKE!!!

 

[uba757]

The YOKE on the B777 works just fine!

 

[BornAgainPagan]

This is Boeing's last chance to....

GET RID OF THE FREAKIN YOKE!!!

Are the meals that important to you?

 

[GogglesPisano]

Yes. Yokes are an anachronistic appeal to a bygone era. But the old-timers seem to like them.

 

[Green]

I think the yoke would have saved Air France 447. The FO was holding full back side stick all the way until impact. The other FO in the left seat and the CA back from the bunk had no idea he was holding full aft until just prior to impact. When the CA realized what he was doing he said "no, no, no." If the 330 had a yoke then the other pilot would have seen the FO with the yoke in his gut and might have been clued into the fact that they were in a deep stall. Any thoughts?

 

[bri5150]

Easy fix. Force feedback on the stick. If one is moved, a motor moves the other one.

 

[ackattacker]

Pay and QOL?

 

[jws717]

I think the yoke would have saved Air France 447. The FO was holding full back side stick all the way until impact. The other FO in the left seat and the CA back from the bunk had no idea he was holding full aft until just prior to impact. When the CA realized what he was doing he said "no, no, no." If the 330 had a yoke then the other pilot would have seen the FO with the yoke in his gut and might have been clued into the fact that they were in a deep stall. Any thoughts?

Power at idle for 30 mins, and you hit the ocean no matter what you do with the stick. (or yoke)

 

[ackattacker]

Power at idle for 30 mins, and you hit the ocean no matter what you do with the stick. (or yoke)

That might be true, except in the AF case the power was at TOGA the whole time so I'm not sure what your point is. What the IRO did with the stick was very relevant in that case.

This whole conversation is utterly pointless. We don't get any input. The 777X is still a 777 at heart and it's going to have a yoke and a common type rating. Period, end of story. All I want to know is when I can bid it and how much does it pay.

 

[dicko]

Power at idle for 30 mins, and you hit the ocean no matter what you do with the stick. (or yoke)

Yes, thirty minutes is a long time. On a bad day, I can't even hold my breath for that long.

The power setting was 100% or TOGA for almost the entire accident sequence. What they did "with the stick" really did matter, since that's what killed everybody on board. The accident sequence was around four minutes.

Other than that, great post.