B777 outboard flap, outboard flap support extension
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- Опубліковано 13 бер 2020
- The No8 flap support fairing had been removed for repair to the composite skin. I took the opportunity to film the flap support in action during a flap extension. In the hangar we use the secondary flap/slat extension system which uses an electric motor, this is very slow so the video has been sped up to 4 times it's normal speed. You could select a playback speed of 0.25 to see the original speed.
- Авто та транспорт
Great viewing! The 747’s triple-slotted inboard trailing edge Fowler flaps blow my mind from complexity, size, lift and look 👀 viewpoints! The inboard double-slots on the 777 are a nice aesthetic touch for that airplane.
Thanks for this video! I’ve always wanted to see the support and mechanical setup in action. Would love to see the inboard flap track like this one day
Interesting! I never knew how they actually operate. Thank you!
You're very welcome, thanks for taking the time to leave a message.
Great behind the scenes action .Great video
Screwjack mechanism has a U-joint for the angle changes.also for the many other systems,the 777 is an engineering marvel!
Great video. ☺️
Great stuff right there
wow!
Great stuff
Interesting! it helped me a lot
Can you post a similar video for the 787? Thanks!
We don't often have these fairing off, especially on the 787, but if the opportunity arises, I'll try.
@@mrifixplanes1813 Your 787 comment makes me wonder why. I'm trying to figure out just where 787's inboard inboard flap actuator is located (inside the fairing I'm told), and just how it's designed and operates relative to the 2nd actuator out, but I'm turning up nothing. What's with these mysterious fairings I wonder.
Anyhoo, thanks for all the quality videos.
@@thatdouche4436 The flaps on the 787 work in pretty much the same way as they do on the 777. A flap power drive unit is located on the ceiling of the wheel well, pretty much on the centreline of the aircraft. This power drive unit (PDU) consists of a hydraulic motor and an electric motor that are both attached to a common gearbox. The hydraulic motor is the primary drive, with the electric motor being there for backup. Coming from each side of the gearbox there are torque tubes (driveshafts), the driveshafts run along the rear spars of the wings to the flap transmission gearboxes, the big green unit you can see in the video above. It is the flap transmission gearboxes that turn the ballscrews to drive the flaps out, and then through a series of linkages the flap rotates downwards as you can also see.
The fairing is there just to make it all aerodynamic, they don't often require removal as you have access to all the lubrication points when the flaps are down, as the fairings are no longer sealed against the flap.
The 737 is pretty much the same system, there's a nice video here ua-cam.com/video/cld62K4ntbk/v-deo.html that shows the torque tubes.
Like Jack Screw !
Why don’t they just use hydraulic rams to extend the flaps?
Is it because they tend to leak fluid and are less reliable or what?
Why no new videos mate?
And I thought it was complicated.
ボロボロやないか
Hand cranking would go faster I think….😂
It's soooooo slow on the electric motor, thankfully it's just a backup to the hydraulic motor.
The 787 does not use a jackscrew right? It's just a rotary actuator arm with the flaps attached on a hinge.