While I worked for the Boeing company I built literally thousands of those drive shafts. The little "dents" in the end where the coupling goes are made by a process called electromagnetic pulse forming (EMF) for short. It was first used in the 777 program then to others. The spline ends are inserted in the tube then it is loaded into a "field shaper" and the EMF charge is applied forcing the annealed tube into the spline locking it into place. No mechanical fasteners are used. A sealant is applied at the joint after forming to prevent corrosion in addition to the spline ends being cadmium coated. They can range from a few inches to several feet in length and one inch diameter to two inch diameter depending on the application.
please, can you send me (or link me) clear blueprints of the 747's flap mechanisms and hinges? I'm a 3D modeler that wants to specialize in aviation and the references on internet are extremely unclear. Thank you.
Those are technically not slats, but variable camber leading edge flaps. They are pneumatically powered which is what makes that noise. It’s loud enough to be heard over the engines running.
Flaps are to increase the surface area of the wing thus creating more lift. When the aircraft slows down it must increase lift to stay airborne. The least amount of flaps are used in takeoff while the most flap is used in landing.
@@davidoriordan1393 These tubes connect the gear boxes that turn the jackscrews that extend and retract the main flaps. I built thousands of them in my career with Boeing.
It’s the flap to fuselage seal, it’s there to seal the flap against the fuselage. This makes it more aerodynamic. Aircraft could fly without it but they will get performance/fuel penalties for that.
No music, no talking, just the mechanical sounds, that's how it makes you feel you're there. Thank you.
While I worked for the Boeing company I built literally thousands of those drive shafts. The little "dents" in the end where the coupling goes are made by a process called electromagnetic pulse forming (EMF) for short. It was first used in the 777 program then to others. The spline ends are inserted in the tube then it is loaded into a "field shaper" and the EMF charge is applied forcing the annealed tube into the spline locking it into place. No mechanical fasteners are used. A sealant is applied at the joint after forming to prevent corrosion in addition to the spline ends being cadmium coated. They can range from a few inches to several feet in length and one inch diameter to two inch diameter depending on the application.
Millimetres . . .
please, can you send me (or link me) clear blueprints of the 747's flap mechanisms and hinges? I'm a 3D modeler that wants to specialize in aviation and the references on internet are extremely unclear.
Thank you.
Very cool to see these massive flap assemblies at work. Thank you!
Glad you like it.
Wow looks so cool, love the 747, thanks for sharing.
Thanks for watching!
Wow, didn’t realize that full flaps were practically down to the ground!
They get close
I love the sound of the slats retracting
Those are technically not slats, but variable camber leading edge flaps. They are pneumatically powered which is what makes that noise. It’s loud enough to be heard over the engines running.
Nice!
Thanks!
monstrous tech, yeah
How sturdy these flaps must be to withstand such air pressure! Actually they have to be able to lift the whole aircraft
Flaps are to increase the surface area of the wing thus creating more lift. When the aircraft slows down it must increase lift to stay airborne. The least amount of flaps are used in takeoff while the most flap is used in landing.
Is this turning part some kind of screw?
It’s a torque tube, like a drive shaft in a car
@@davidoriordan1393 These tubes connect the gear boxes that turn the jackscrews that extend and retract the main flaps. I built thousands of them in my career with Boeing.
Can you post a similar video as this for the A350 and 747-8? Thanks.
I had never noticed it before - is there a cloth-like part of the structure at 2:05?
It’s the flap to fuselage seal, it’s there to seal the flap against the fuselage. This makes it more aerodynamic. Aircraft could fly without it but they will get performance/fuel penalties for that.