^^^^^ I believe it's capable to actually TAKE OFF on one engine. As in, the other engine isn't even running. I believe I saw that some time ago on a documentary about the 777 engines...
"If you’re a leader, you lead the way. Not just on the easy ones; you take the tough ones too…” – MAJ Richard D. Winters (1918-2011), E Company, 2nd Battalion, 506th Parachute Infantry Regiment, 101st Airborne "Woe to those who call evil good, and good evil... Therefore, as tongues of fire lick up straw and as dry grass sinks down in the flames, so their roots will decay and their flowers blow away like dust; for they have rejected the law of the Lord Almighty and spurned the word of the Holy One of Israel." - Isaiah 5:20,24
January 27, 2020, 02:24 PM
P250UA5
Also, IIRC, in the development of the engines, they put one on the inboard pylon of a 747 and were able to fly the plane (cruise) on the single engine. I don't fully recall if the other 3 were shut down, or just idled.
The Enemy's gate is down.
January 27, 2020, 02:41 PM
rscalzo
quote:
two GE9X engines are the biggest and most powerful turbine engines in operation.
The one of their factory's is here in Hooksett, NH.
Originally posted by erj_pilot: ^^^^^ I believe it's capable to actually TAKE OFF on one engine. As in, the other engine isn't even running. I believe I saw that some time ago on a documentary about the 777 engines...
That's incredible! Thanks for the info.
God's mercy: NOT getting what we deserve! God's grace: Getting what we DON'T deserve!
"If the enemy is in range, so are you." - Infantry Journal
Bob P239 40 S&W Endowment NRA Viet Nam '69-'70
January 27, 2020, 03:59 PM
comet24
Wingtips automatically fold up below 50 knots. Hmmmm. I hope they have the bug worked out of that system.
_____________________________________
Because in the end, you won’t remember the time you spent working in the office or mowing your lawn. Climb that goddamn mountain. Jack Kerouac
January 27, 2020, 04:15 PM
229DAK
I wonder if it has/had the same or modified flight control system as the 737 Max?
_________________________________________________________________________ “A man’s treatment of a dog is no indication of the man’s nature, but his treatment of a cat is. It is the crucial test. None but the humane treat a cat well.” -- Mark Twain, 1902
January 27, 2020, 04:45 PM
P250UA5
quote:
Originally posted by comet24: Wingtips automatically fold up below 50 knots. Hmmmm. I hope they have the bug worked out of that system.
Curious what the flight performance is with the wingtips folded? Can it maintain altitude/nominal flight performance with them folded?
The Enemy's gate is down.
January 27, 2020, 05:12 PM
LS1 GTO
quote:
Originally posted by P250UA5:
quote:
Originally posted by comet24: Wingtips automatically fold up below 50 knots. Hmmmm. I hope they have the bug worked out of that system.
Curious what the flight performance is with the wingtips folded? Can it maintain altitude/nominal flight performance with them folded?
One thing’s for sure, it ain’t flying if it’s doing 50 knots. It’s either stalled and about to do a lot faster than 50 knots or it’s on the ground.
Life moves pretty fast. If you don't stop and look around once in a while, you could miss it.
"If dogs don't go to Heaven, I want to go where they go" Will Rogers
The definition of the words we used, carry a meaning of their own...
January 27, 2020, 05:26 PM
r0gue
quote:
Originally posted by aileron:
quote:
Originally posted by r0gue: Did you see that chase plane? P-80 Shooting Star? Are they really flying Korean War era aircraft?
I only watched the video once but it looked like a T-33 to me.
Makes sense. I Googled the T-33 (I'd never heard of it), and it turns out they're the same thing.
The Lockheed T-33 Shooting Star (or T-Bird) is a subsonic American jet trainer. It was produced by Lockheed and made its first flight in 1948. The T-33 was developed from the Lockheed P-80/F-80 starting as TP-80C/TF-80C in development, then designated T-33A. It was used by the U.S. Navy initially as TO-2, then TV-2, and after 1962, T-33B. The last operator of the T-33, the Bolivian Air Force, retired the type in July 2017, after 44 years of service."
January 27, 2020, 06:20 PM
P250UA5
quote:
Originally posted by LS1 GTO:
quote:
Originally posted by P250UA5:
quote:
Originally posted by comet24: Wingtips automatically fold up below 50 knots. Hmmmm. I hope they have the bug worked out of that system.
Curious what the flight performance is with the wingtips folded? Can it maintain altitude/nominal flight performance with them folded?
One thing’s for sure, it ain’t flying if it’s doing 50 knots. It’s either stalled and about to do a lot faster than 50 knots or it’s on the ground.
I was thinking more along the lines of inadvertent wingtip folding in normal cruise conditions; how it would affect flight performance.
The Enemy's gate is down.
January 27, 2020, 07:13 PM
sigcrazy7
quote:
Originally posted by 229DAK: I wonder if it has/had the same or modified flight control system as the 737 Max?
Unlikely. The MCAS system is there to compensate for the oversized engines on an aircraft that is too short (landing gear) for them. They were moved forward and up, so the MCAS system was developed.
The whole 737Max fiasco could have been avoided if they would have used the 757 airframe instead of taking the 737 so far beyond its initial design. Just my opinion, but I hate to see Boeing’s troubles. They should have let engineers in Seattle build aircraft instead of accountants in Chicago.
Demand not that events should happen as you wish; but wish them to happen as they do happen, and you will go on well. -Epictetus
January 27, 2020, 07:18 PM
sns3guppy
quote:
Originally posted by P250UA5: Also, IIRC, in the development of the engines, they put one on the inboard pylon of a 747 and were able to fly the plane (cruise) on the single engine. I don't fully recall if the other 3 were shut down, or just idled.
Given that there are four different hydraulic systems run off four different engines on the 747 and the big GE was only on board for experimental purposes and not there to run the aircraft...no.
The 747 won't fly on one engine low altitude, drift down. It doesn't do particularly well on two. At all.
January 27, 2020, 07:29 PM
erj_pilot
quote:
Originally posted by Yellow Jacket: That's incredible! Thanks for the info.
You are quite welcome! I believe this is the documentary that talked about the B777 engine and engine testing during design and production.
"If you’re a leader, you lead the way. Not just on the easy ones; you take the tough ones too…” – MAJ Richard D. Winters (1918-2011), E Company, 2nd Battalion, 506th Parachute Infantry Regiment, 101st Airborne "Woe to those who call evil good, and good evil... Therefore, as tongues of fire lick up straw and as dry grass sinks down in the flames, so their roots will decay and their flowers blow away like dust; for they have rejected the law of the Lord Almighty and spurned the word of the Holy One of Israel." - Isaiah 5:20,24
January 27, 2020, 07:40 PM
trapper189
quote:
Originally posted by r0gue:
quote:
Originally posted by aileron:
quote:
Originally posted by r0gue: Did you see that chase plane? P-80 Shooting Star? Are they really flying Korean War era aircraft?
I only watched the video once but it looked like a T-33 to me.
Makes sense. I Googled the T-33 (I'd never heard of it), and it turns out they're the same thing.
The Lockheed T-33 Shooting Star (or T-Bird) is a subsonic American jet trainer. It was produced by Lockheed and made its first flight in 1948. The T-33 was developed from the Lockheed P-80/F-80 starting as TP-80C/TF-80C in development, then designated T-33A. It was used by the U.S. Navy initially as TO-2, then TV-2, and after 1962, T-33B. The last operator of the T-33, the Bolivian Air Force, retired the type in July 2017, after 44 years of service."
The chase plane was a Canadair CT-133 Silver Star, a licensed copy of the T-33 built in Canada.
January 27, 2020, 07:50 PM
comet24
quote:
Originally posted by P250UA5:
quote:
Originally posted by LS1 GTO:
quote:
Originally posted by P250UA5:
quote:
Originally posted by comet24: Wingtips automatically fold up below 50 knots. Hmmmm. I hope they have the bug worked out of that system.
Curious what the flight performance is with the wingtips folded? Can it maintain altitude/nominal flight performance with them folded?
One thing’s for sure, it ain’t flying if it’s doing 50 knots. It’s either stalled and about to do a lot faster than 50 knots or it’s on the ground.
I was thinking more along the lines of inadvertent wingtip folding in normal cruise conditions; how it would affect flight performance.
That's was my point considering Boeing's recent track record with computers controlling flight surfaces.
Half joking, half not so sure.
They said the wingtip fold after landing when the plane slows below 50 knots.
_____________________________________
Because in the end, you won’t remember the time you spent working in the office or mowing your lawn. Climb that goddamn mountain. Jack Kerouac
January 27, 2020, 08:12 PM
P250UA5
Right. Just my curiosity on how vital they are to normal flight, if 1 or both were to fold at cruise speed.
The Enemy's gate is down.
January 27, 2020, 08:34 PM
erj_pilot
quote:
Originally posted by P250UA5: I was thinking more along the lines of inadvertent wingtip folding in normal cruise conditions; how it would affect flight performance.
The wingtip folding system would work off a sensor programmed with air/ground logic. If there is no weight on the wheels, those wingtips aren't going to fold. And I would imagine, the engineers designed them to "fail" in the down position. Those sensors are pretty reliable and I can only think of maybe one or two times in my 15-year career where an air/ground sensor failed. The Embraer Regional Jet is chock full of those things and that platform, in my experience, was EXTREMELY reliable.
"If you’re a leader, you lead the way. Not just on the easy ones; you take the tough ones too…” – MAJ Richard D. Winters (1918-2011), E Company, 2nd Battalion, 506th Parachute Infantry Regiment, 101st Airborne "Woe to those who call evil good, and good evil... Therefore, as tongues of fire lick up straw and as dry grass sinks down in the flames, so their roots will decay and their flowers blow away like dust; for they have rejected the law of the Lord Almighty and spurned the word of the Holy One of Israel." - Isaiah 5:20,24
January 27, 2020, 10:14 PM
sigcrazy7
After reading about the internet a bit, I’ve noticed people seem to be up in a knot about the safety of the folding wings. Why all the fuss? Haven’t there been folding wings on aircraft since WWII? I never, not once, recall hearing about a wing folding during flight, except from battle damage. Besides, it’s 3.5 meters of wing. You’d think the crew could trim that out if one folds. Seems like much ado about nothing, and a rather smart solution at crowded airport gates.
Demand not that events should happen as you wish; but wish them to happen as they do happen, and you will go on well. -Epictetus
Originally posted by BBMW: Is it on Youtube, or do you have a file on your computer?
quote:
Originally posted by Phantom229: I have a video from BFI tower of the 777x and the T-33 chase plane flyby the tower. (I just don’t know how to post it).
Originally posted by sigcrazy7: After reading about the internet a bit, I’ve noticed people seem to be up in a knot about the safety of the folding wings. Why all the fuss? Haven’t there been folding wings on aircraft since WWII? I never, not once, recall hearing about a wing folding during flight, except from battle damage. Besides, it’s 3.5 meters of wing. You’d think the crew could trim that out if one folds. Seems like much ado about nothing, and a rather smart solution at crowded airport gates.
For me it's more curiosity & less paranoia The engineer in me is fascinated by how it all works
