747 Gear Swing
by on Friday, December 21st, 2012 | 23 Comments
B747-200F Landing gear retract test
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good video… the music fatal!
why always no reason music?
we just want to see how it works and how it sound like
Fade to Black is wonderful on this video <3
Best song.
big ass hydraulic jack stands LOL
C-5 don’t really need a jack on the mains. They can raise the gear off the ground. The nose is a different story. What you are talking about soft grnd. Well the acft would never be their in the first place or it would be a class 1 misshape. Engines on C-5/17 are inst/rm by the same way as the commercial passenger jets are. Since they basically use the same eng and pylon. C-130 uses a hoist mounted on the wing to change the eng. The american fighters are not design for unpaved runways. A-10 can
Most large transport aircraft use the engine mounts on the pilon to secure a hoist to and the large gas turbine engines have different size fluid couplings for ease of engine swapping.
Oh yes you can! Old bush mechanics cut down trees to build a crane and swap engines on Norsemen, why not try something creative to change a tire on a C-17 or C5? I know how much they weigh, but the air force wouldn’t have an airplane designed without the capability for it to be repaired in the field. I’m not talking chinks of the airframe missing like flight of the phoenix that was pure bullshit… I’m talking engine changes and tire changes and troubleshooting.
Oh yes you can, Bring some wood plates with you. How does a tiny ramp jack take all of that weight on a hot day on the ramp and not sink into the ash fault? I’ve done it before… Its easier to do in the winter when the ground is frozen, but the summer time can be trickier. I’m not talking about a travelair , I’m talking about a DHC-8. You can probably jack up a C-17 gear leg in the desert if the ground is firm enough, but grass would be tricky. Some guys dig a hole to change a tire.
hyd jack for field repair? no! The ground would not support it.
Probably air in the hyd lines
ALL modern landing gears are retracted and extended by hydraulics. NONE to my knowledge are done by pneumatics. The slowness of what you see is because the hyd pumps from the external hyd cart does not put out the same flow as from the engines running. Goes down fast? The weight of the landing gear should allow it to free fall & lock down if their is a hyd failure and the blow down bottle fails (if it has one). How I know this? I’ve worked on acft for over 20 yrs. mil & civilian.
Yeah. We use 20-60ton screw type jacks for the KC-135′s.
Also, your other point about the speed is invalid.
Lol, i’ve never seen an 747 with an pneumatic gear system..
Not the time for the jacks fail… haha
Metallica and a 747. Nice combination.
Mate, it’s Qantas after all, and they still have that government owned mentality ie like a lesbian; they don’t do dick.
music doesnt really fit the video..
actually more impressive is the fact that these landing gears and wheels can support all this weight. hydraulic jacks are basically much more capable of supporting much greater weights. and they are pretty simple too
WOW nicely done
shut the music up god why do we need music all the time
It has to be weird to retract the landing gear while the aircraft is still on the ground.
Looks like the hydro sequence valves where out of adjustment on the first gear retract since the main wing gears were lagging behind the aft fuselage gears to slip into the wells. They must have fixed the problem since the second gear retract, showing the nose gear then the main gears, retracted normally.