14 May 2025, 00:35 [ UTC - 5; DST ]
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Username Protected
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Post subject: Re: Boeing 777-9 Test Flight!  Posted: 15 May 2020, 12:33 |
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Joined: 02/03/11
Posts: 10232
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Company: Gee Bee Aeroproducts
Aircraft: hang glider
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Ge Genex Powered.... Too wide, cant get into the gates and older airports, reduces wing length The cowlings are mfg by Ace Clearwater.. 
Last edited on 15 May 2020, 12:37, edited 1 time in total.
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Username Protected
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Post subject: Re: Boeing 777-9 Test Flight! Posted: 15 May 2020, 12:34 |
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Joined: 06/06/12
Posts: 2402
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Company: FlightRepublic
Location: Bee Cave, TX
Aircraft: SR20
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Username Protected wrote: Makes the chem trails stronger.  Why didn’t I think of that?
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Antoni Deighton
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Username Protected
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Post subject: Re: Boeing 777-9 Test Flight! Posted: 15 May 2020, 12:37 |
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Joined: 09/16/10
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Username Protected wrote: Why is Boeing using a wing folding mechanism on this plane instead of a large winglet like the 737-800 or 737 MAX? Carrier version? Do they come back up in cruise configuration?
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Education cuts, don't heal.
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Post subject: Re: Boeing 777-9 Test Flight! Posted: 15 May 2020, 12:47 |
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Joined: 05/01/14
Posts: 9262
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Location: Операционный офис КГБ
Aircraft: TU-104
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Username Protected wrote: Why is Boeing using a wing folding mechanism on this plane instead of a large winglet like the 737-800 or 737 MAX? Short answer is using a winglet to increase effective wingspan is a compromise vs a longer wing.
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Flight suits = superior knowledge
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Post subject: Re: Boeing 777-9 Test Flight! Posted: 15 May 2020, 12:54 |
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Joined: 03/25/12
Posts: 7038
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Location: KCMA - Camarillo, CA
Aircraft: Bonanza G-35
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Username Protected wrote: Anyone know what the control surface behind the engine is? Almost looks like some kind of thrust vectoring.
It appears to be a spoiler of some type for roll control. Unique application for sure.
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Post subject: Re: Boeing 777-9 Test Flight! Posted: 15 May 2020, 14:06 |
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Joined: 05/01/14
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Location: Операционный офис КГБ
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Username Protected wrote: Thank you, Matt
It seems like Boeing has been focused on weight reduction and using more carbon fiber recently, so it's interesting that the compromise in this case leaned toward the wing-folding solution despite the added weight and complexity. Reducing drag is going to save more Jet A than the weight penalty, especially on long routes.
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Be kinder than I am. It’s a low bar.
Flight suits = superior knowledge
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Post subject: Re: Boeing 777-9 Test Flight! Posted: 15 May 2020, 14:29 |
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Joined: 12/06/12
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Location: Newnan, GA (KCCO)
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Quote: Anyone know what the control surface behind the engine is? I assume it's an inboard aileron. While I don't have any 777 experience, the 767 had an inboard aileron that looked and acted the same way.
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Post subject: Re: Boeing 777-9 Test Flight! Posted: 15 May 2020, 19:49 |
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Joined: 04/29/13
Posts: 753
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Aircraft: C177RG, ATOS-VR
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Username Protected wrote: Why is Boeing using a wing folding mechanism on this plane instead of a large winglet like the 737-800 or 737 MAX? Look up sheared wingtip. In some installations they perform better than a winglet. My Cardinal has sheared wingtips designed by Roy Shobchuck. They tested better than the various winglets he investigated. NASA did a lot of wind tunnel test on them in the late '80s and early '90s. The only downside for me is my plane now has a wingspan of 39' 3", and my hangar clearance is about 6" on each side. Vince
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Post subject: Re: Boeing 777-9 Test Flight! Posted: 16 May 2020, 02:15 |
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Joined: 11/22/12
Posts: 2819
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Company: Retired
Location: Lynnwood, WA (KPAE)
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Username Protected wrote: It seems like Boeing has been focused on weight reduction and using more carbon fiber recently, so it's interesting that the compromise in this case leaned toward the wing-folding solution despite the added weight and complexity. Carbon changed the tradeoff. Folding wingtips were initially offered on the 777's metal wing but no airline bought them, IIRC they weighed 3,600 lbs. On the 777X carbon wing they only add about 400 lbs if memory serves and all airlines wanted them, they were made standard.
Last edited on 16 May 2020, 10:12, edited 2 times in total.
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