The sound at 0:47 is nothing to worry about, I flew 747 once and it was there, too. It's on EVERY 747 when lifting of, because parts of the gear make that noise.
On 747's and other heavy aircraft when they rotate, that bang is the release in weight from on the suspension. Nothing to worry about, but I can understand if you dont fly on long-haul aircrafts often how it can be mis-understood.
That thud is felt to some degree on all takeoffs on modern aircraft. The suspension in the landing gear has to be very strong to handle a hard and heavy landing, so when the weight is removed from the landing gear at positive climb, the suspension relaxes and there is a loud "THUD!" as the gear reach the end of their travel. There is often a softer "thud" soon after as brakes are automatically applied to stop the gear from rotating at the beginning of the retraction sequence.
At that speed it was most like a runway bump such as a tar line or repaired section of concrete. At some airports that sound can be heard continously during the takeoff roll.
It is the rear landinggear wheels tilting JUST after they leave the ground, one side goes down, the other goes up, cause the " bang " sound. Basically the gear stops against the leg.
@HeliVis It's not the suspension leg, going out making that sound, that's not possible since it's hydraulic. It's the outer 2 wings sets ( 4 wheels ) titling to one side, and banging against the leg.. caused by windspeed and inbalance. You can see this one many videos from 747 takeoff's from the outside, if you watch it closely.
@barthoedemaker Hey thanks for saying hi. I'm not so sure but again I wouldn't know 100% by anyone's stretch. However regardless of hydraulics or not the rearmost sets still rotate and hit steel stops at the end of their normal throw. I suppose the way to find out for sure would be to ask someone who would know and I know a few people in Boeing who could perhas lead me to someone there who can tell us. I'll write my bud and see what he can find out.
@HeliVis That would be nice, if you can contact them. I have 2 friends who are pilot and co pilot with KLM, but they don't know much about the technical stuff. However myself, I have my own garage, I know all about engines and mechanical engineering, ( commercial )planes are just a interest :)
@barthoedemaker That said, I think I was mistaken before. You are right it's the OUTSIDE bogeys that rotate against their stops, and it seems to correspond in timing during the rotation that they uplift from the runway. But they don't hit the leg they hit steel blocks called stops. I really think that's what we are talking about but I can surely find out and get back to you in a couple days.
@PilotOfNorway91 Why would tires make sounds lifting off a runway? Do cars and motorcycles go BANG when they jump off a ramp or something? It's the C/D wheelsets rotating back against their stops. If you think this is bad try a wing seat on the new 777s they're usually quieter but on occasion they sound like bombs going off or something loose in the hold banging around.
I would have originally said the same thing that many others stated, but looking at the video, makes me wonder. If this is a 747, would you actually hear it or feel it? I wouldn't think so. It's a huge plane. I am going out on a limb, but I'm guessing maybe a bird strike.
Allways the same: During on ground the Wing Landing Gear is on the ground, it is at a right angle to the leg. - After Take-off is by the compensation - Pneumatics in a nearly vertical position. - Otherwise, this 4 * 4 Boogie - construction not in his casing could fit. The sound is the stop. You will find many videos on youtube starting 747- Aircrafts (or forward Gear Cam), look at a Videos, you will see excactly this ! Have fun :)
hey man nice vid PS> the sound you heard and what we heard was the landing gear braking before it slots into the under carriage area there's the answer
From raykrislianggi: A 747 has 2 stages of Landing gears. When it lifts off, the front stage will go up, and the back stage will stick on the ground for about 0,5-1 seconds after the front stage left the ground. At that time, the 1st stage of the landing gear will spin so fast without a contact to the ground, it makes the gears vibrate, and the same with the 2nd stage. When both stages are off the ground, the 2nd stage will go down and the 1st stage will go up. That makes a little "Bang" sound.
@shay747400 Just at 0:47 there's that bang sound before it becomes airborne. It was much louder than what the camera picks up and yeah it's definitely a 747-400.
When the 747 lifts off, the pressure is released off the oleos and the gear dropping as a result from the decreased pressure makes that sound.
itachiuchiha026 2 days ago
bitch please.. we all know u farted---
hsguitarist 4 days ago
The sound at 0:47 is nothing to worry about, I flew 747 once and it was there, too. It's on EVERY 747 when lifting of, because parts of the gear make that noise.
ebksb123 4 days ago
Humm first need good mic to and the sounds o well mabey runway was not so smoot.
anice1983 5 days ago
On 747's and other heavy aircraft when they rotate, that bang is the release in weight from on the suspension. Nothing to worry about, but I can understand if you dont fly on long-haul aircrafts often how it can be mis-understood.
rachaelmatt 1 week ago
That thud is felt to some degree on all takeoffs on modern aircraft. The suspension in the landing gear has to be very strong to handle a hard and heavy landing, so when the weight is removed from the landing gear at positive climb, the suspension relaxes and there is a loud "THUD!" as the gear reach the end of their travel. There is often a softer "thud" soon after as brakes are automatically applied to stop the gear from rotating at the beginning of the retraction sequence.
MikeGinnyMD 1 week ago
@ comments below, no this is common sound on 747's.. like I explained below.
barthoedemaker 2 weeks ago
All im looking at is that steep take off!
hiimkian 2 weeks ago
At that speed it was most like a runway bump such as a tar line or repaired section of concrete. At some airports that sound can be heard continously during the takeoff roll.
aerialpic 2 weeks ago
Not necessarily true. It's not like a pilot can tell if he hit a bird for sure. It doesn't mean the pilot even seen a bird near the plane.
0To60InABlink 2 weeks ago
1. The aircraft rotated...there could have been a tail strike a guess.
2. A quick rotation
3. Could have been your camera.
CaptainMike97 2 weeks ago
@CaptainMike97 Not a strike. Look at the angle. Not even close.
HeliVis 1 week ago
It is the rear landinggear wheels tilting JUST after they leave the ground, one side goes down, the other goes up, cause the " bang " sound. Basically the gear stops against the leg.
barthoedemaker 2 weeks ago
@barthoedemaker Bingo!
HeliVis 1 week ago
@HeliVis It's not the suspension leg, going out making that sound, that's not possible since it's hydraulic. It's the outer 2 wings sets ( 4 wheels ) titling to one side, and banging against the leg.. caused by windspeed and inbalance. You can see this one many videos from 747 takeoff's from the outside, if you watch it closely.
barthoedemaker 6 days ago
@barthoedemaker Hey thanks for saying hi. I'm not so sure but again I wouldn't know 100% by anyone's stretch. However regardless of hydraulics or not the rearmost sets still rotate and hit steel stops at the end of their normal throw. I suppose the way to find out for sure would be to ask someone who would know and I know a few people in Boeing who could perhas lead me to someone there who can tell us. I'll write my bud and see what he can find out.
HeliVis 5 days ago
@HeliVis That would be nice, if you can contact them. I have 2 friends who are pilot and co pilot with KLM, but they don't know much about the technical stuff. However myself, I have my own garage, I know all about engines and mechanical engineering, ( commercial )planes are just a interest :)
barthoedemaker 5 days ago
@barthoedemaker That said, I think I was mistaken before. You are right it's the OUTSIDE bogeys that rotate against their stops, and it seems to correspond in timing during the rotation that they uplift from the runway. But they don't hit the leg they hit steel blocks called stops. I really think that's what we are talking about but I can surely find out and get back to you in a couple days.
HeliVis 5 days ago
@HeliVis yup.
barthoedemaker 5 days ago
Sounds like the tires left the ground, there's your bang! :)
PilotOfNorway91 2 weeks ago
@PilotOfNorway91 Why would tires make sounds lifting off a runway? Do cars and motorcycles go BANG when they jump off a ramp or something? It's the C/D wheelsets rotating back against their stops. If you think this is bad try a wing seat on the new 777s they're usually quieter but on occasion they sound like bombs going off or something loose in the hold banging around.
HeliVis 1 week ago
@HeliVis watch?v=52vQFYBbmHo ( keep repeating at 44 seconds into the video, and pay attention to the outer 2 wing sets )
barthoedemaker 6 days ago
I would have originally said the same thing that many others stated, but looking at the video, makes me wonder. If this is a 747, would you actually hear it or feel it? I wouldn't think so. It's a huge plane. I am going out on a limb, but I'm guessing maybe a bird strike.
0To60InABlink 3 weeks ago
@0To60InABlink If it was a bird strike, then the pilot would have returned to the airport to examine damage that a bird may have done!
Extermetal 3 weeks ago
Allways the same: During on ground the Wing Landing Gear is on the ground, it is at a right angle to the leg. - After Take-off is by the compensation - Pneumatics in a nearly vertical position. - Otherwise, this 4 * 4 Boogie - construction not in his casing could fit. The sound is the stop. You will find many videos on youtube starting 747- Aircrafts (or forward Gear Cam), look at a Videos, you will see excactly this ! Have fun :)
Pyanities 3 weeks ago
the "bang" is the shock absorbers decompressing as the wheels lift off the ground
trenchnuts 3 weeks ago
must of been the landing gear
CaptainFox91 1 month ago
was that at st.paul airport?
MrLonewarrior6 1 month ago
that noise was a bump
Andwrightrocks 1 month ago
hey man nice vid PS> the sound you heard and what we heard was the landing gear braking before it slots into the under carriage area there's the answer
100mgpscoot 2 months ago
hi that sound is the the the gear braking so it can in to the under carriage slot theres your answer
100mgpscoot 2 months ago
From raykrislianggi: A 747 has 2 stages of Landing gears. When it lifts off, the front stage will go up, and the back stage will stick on the ground for about 0,5-1 seconds after the front stage left the ground. At that time, the 1st stage of the landing gear will spin so fast without a contact to the ground, it makes the gears vibrate, and the same with the 2nd stage. When both stages are off the ground, the 2nd stage will go down and the 1st stage will go up. That makes a little "Bang" sound.
TheFSB737 2 months ago
maybe a tail strike?
tigersfanatic98 4 months ago
probably a small hole in the runway which the landing gear went over
W1NgC0mM4nD3R 5 months ago
It's not 737-800 or A320.?
shay747400 5 months ago
@shay747400 its a 747 400 the guy went on it
100mgpscoot 2 months ago
?What's the problem
shay747400 5 months ago
@shay747400 Just at 0:47 there's that bang sound before it becomes airborne. It was much louder than what the camera picks up and yeah it's definitely a 747-400.
etisoppo 5 months ago
@etisoppo This is because the V2
Anyway. I do not think there's a problem with that. It's not a wing of the 747-400.
shay747400 5 months ago
@shay747400 Its definately a 747 sir. Travel on one before making naive judgements.
jpilot101 3 months ago
Comment removed
DOG442 2 months ago
This has been flagged as spam show
@etisoppo That was the landing gear tilting. The main landing gears under the belly and wing are angled when the airplane isn't on the ground.
DOG442 2 months ago
@etisoppo all planes make that sound before they go airborne.
MrKyvegas00 4 weeks ago