Boeing 777(X) news

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sn26567
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Re: Boeing 777(X) news

Post by sn26567 » 24 Jan 2020, 23:11

André
ex Sabena #26567

stratofreighter
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Re: Boeing 777(X) news

Post by stratofreighter » 25 Jan 2020, 16:05

https://twitter.com/flightradar24/statu ... 1871808514
Let’s try again!
Boeing’s 777X is scheduled for first flight this morning at 10:00 PT (18:00 UTC).

6:30 AM - 25 Jan 2020
https://uk.flightaware.com/live/flight/BOE1
Takeoff
10:00 PST
Scheduled 10:00 PST

Landing
10:08 PST
Scheduled 10:08 PST

stratofreighter
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Joined: 07 Sep 2006, 16:50

Re: Boeing 777(X) news

Post by stratofreighter » 25 Jan 2020, 16:07

stratofreighter wrote:
25 Jan 2020, 16:05
https://twitter.com/flightradar24/statu ... 1871808514
Let’s try again!
Boeing’s 777X is scheduled for first flight this morning at 10:00 PT (18:00 UTC).

6:30 AM - 25 Jan 2020
https://uk.flightaware.com/live/flight/BOE1
Takeoff
10:00 PST
Scheduled 10:00 PST

Landing
10:08 PST
Scheduled 10:08 PST
PAE
EVERETT, WA
SATURDAY 25-JAN-2020
10:00 PST

BFI
SEATTLE, WA
SATURDAY 25-JAN-2020
10:08 PST

8m total travel time

stratofreighter
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Joined: 07 Sep 2006, 16:50

Re: Boeing 777(X) news

Post by stratofreighter » 25 Jan 2020, 18:15


https://www.youtube.com/watch?v=ZJ5CpK9UqDI

https://livestream.com/accounts/3233120 ... 746/player
/
https://www.boeing.com/commercial/777x/first-flight

Helicopter is up again, Boeing 777X ready for taxi-ing after push-back. Engines being started up.

stratofreighter
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Joined: 07 Sep 2006, 16:50

Re: Boeing 777(X) news

Post by stratofreighter » 25 Jan 2020, 18:54

...aircraft is now at the same holding position as yesterday,
she may turn onto runway 34 at about 19.00 hrs CET Europe.

stratofreighter
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Re: Boeing 777(X) news

Post by stratofreighter » 25 Jan 2020, 19:11

Image

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sn26567
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Re: Boeing 777(X) news

Post by sn26567 » 25 Jan 2020, 20:17

:lol:
André
ex Sabena #26567

Kapitein
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Re: Boeing 777(X) news

Post by Kapitein » 28 Jan 2020, 16:23

Saw it live and saw it afterwards a few times again, nice aircraft btw.
But it has a strange take off position, probably it has something to do with length and avoiding a tailstrike.
When you look close, the rightmaingear (first row of wheels) is already of the ground and then the nosegear. Just looking strange to me.

lucas
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Re: Boeing 777(X) news

Post by lucas » 28 Jan 2020, 19:45

Kapitein wrote:
28 Jan 2020, 16:23
Saw it live and saw it afterwards a few times again, nice aircraft btw.
But it has a strange take off position, probably it has something to do with length and avoiding a tailstrike.
When you look close, the rightmaingear (first row of wheels) is already of the ground and then the nosegear. Just looking strange to me.
the B787-10 has the same feature. It is indeed meant to avoid tailstrikes.

737MAX
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Re: Boeing 777(X) news

Post by 737MAX » 28 Jan 2020, 22:20

lucas wrote:
28 Jan 2020, 19:45
Kapitein wrote:
28 Jan 2020, 16:23
Saw it live and saw it afterwards a few times again, nice aircraft btw.
But it has a strange take off position, probably it has something to do with length and avoiding a tailstrike.
When you look close, the rightmaingear (first row of wheels) is already of the ground and then the nosegear. Just looking strange to me.
the B787-10 has the same feature. It is indeed meant to avoid tailstrikes.
Every 787 has a tailstrike protection system.

IMHO the first 777-9X T/O position looked « strange » due to its light T/O weight....

modeS
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Re: Boeing 777(X) news

Post by modeS » 29 Jan 2020, 09:14

Lucas probably wanted to refer to the semi-levered gear design on the main gears. An SLG basically has an additional hydraulic strut connecting the forward part of the main gear bogie and the vertical main gear strut. During takeoff this hydraulic strut locks the main gear bogie perpendicularly to the vertical main gear strut, hereby changing the rotation point from the center of the main gear bogie to the aft wheels of the bogie. This results in an increased tailstrike clearance for same pitch (or increased pitch allowance for same tailstrike clearance), hereby improving the takeoff performance.

Technically speaking an SLG is not a tailstrike protection system. The protection comes from the FBW control laws. On the 787, SLG is effectively only available on the B78X. Furthermore it's available on the B77W and most likely on the new B779 (and B778?) as well.

That being said, me too thinks the 'strange' takeoff movement is mostly caused by the light aircraft mass (and possibly increased rotation speed to be on the safe side energy wise, certainly on the very first flight?).

737MAX
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Re: Boeing 777(X) news

Post by 737MAX » 29 Jan 2020, 10:25

Interesting, thank you for the extra information, modeS!

DIBO
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Re: Boeing 777(X) news

Post by DIBO » 29 Jan 2020, 10:44

This guy has an interest in semi-levered gears and made some nice close up pictures
https://twitter.com/jonostrower/status/ ... 04640?s=20
but here his comment is wrong, as mentioned in a reply tweet: it's like standing on your heels
https://twitter.com/jonostrower/status/ ... 68416?s=20

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