Way back, leading up to Chuck Yegar, The shock wave would move from the front of the wing, which could co super sonic, back to the rear of the wing, and oscillate. The frequency of the oscillation would naturally find the resonate frequency of the wing. This killed lots of very skilled folks. Boeing figured out how to put up with the wave front, and get it to stabilize, where it could go along with the show and not cause too much trouble. This is what you saw,, you are very lucky to see this, thanks to sharing the vid!.
Are you talking about the SCRATCH in the inside plexi glass. That moves with your camera movement. Waste of time try looking at the Shockwave off an F16
Brigadier general Charles (Chuck ) Yeager was an Americian flying ace and test pilot,in 1947 he became the first man to break the speed of sound in level flight.He was from West Virginia and there is an airport there named after him,Yeager Airport.
A great observation of an elusive phenomena, filmed--Chuck Yeager's courage and science contributed directly to the 747 design. The B747 from earliest iterations to the final has always had 'hugely' swept wings, for a commercial airliner (37.5 degrees)... This allowed it to maintain the fastest level cruise speed over any other, at 0.85 to 0.86 Mach and higher. However, due to that more extreme sweep, the 747 emerged from the Engineer's desks with aesthetically beautiful, massive, no longer seen, complex, triple-slotted trailing edge flap arrays that increase the low speed lift of the swept wing at approach speeds, by some 90% over the clean state. I salute the Queen of the Skies--a slide-rule, wind-tunnel and hand calculator design that has now scientifically validated its safety and efficacy for more than 50 years! Why must we passengers be forced off the deleted 747 in favour of carbon resin and plastic un-validated aircraft designs that are now showing multiple composite issues in normal operation?
I don't think that's a shock wave. I think it's just an interference pattern within the window itself. Notice there is what looks like a small speck near the engine pylon by the wing leading edge that moves left or right in sync with the movement of the "shock wave" as the camera angle changes --- a real shock wave wouldn't do that.
Actually it is. They're usually easier to spot as a zig-zag on the horizon when viewing it across the length of the wing. I've seen them over the wing of an L10-11 and a B-727. The airplane isn't really in a full transonic cruise but local velocities above the wing briefly exceed Mach 1, just slightly but enough for a small wave.
First of all a plane wouldn’t fly at sonic speed cuz they are clearly not designed for it. Second, The amount of drag generated would decrease the lift of that plane a lot.
I think it has to do with the airspeed flowing over the wings, I'm not an aerospace engineer, but I do know that the propellers on some planes exceed the speed of sound, thus causing a shockwave.
It isn’t the speed of the plane that matters, but the speed of the airflow over the wings, which is faster than the plane itself. Also, the speed of sound is lower at higher altitudes.
@@xyzxyz_3086 in the case of a "shock wave", the speed of the aircraft matters if it's in the context of a sonic boom. The aircraft's airspeed - not its ground speed. But yes, the speed of sound varies due to altitude in general.
The Greek Crew chief ( I wish I could remember his name) of VP-BAT once told me of this phenomenon on his aircraft. He described it as dancing just aft of the leading edge. Look up VP-BAT's interior. Its a former Pan Am 747SP. Cheers!
Light passing through the wave is diffracted slightly. You're seeing the "shadow" of the wave on the wing surface. The speed of the air over the wing can reach Mach 1 even when the plane itself isn't moving at Mach 1. A typical 747 cruise speed at 35,000' is Mach .86 / 575mph. (Mach 1 at sea level is @ 762 mph. At 35,000' it's @ 679 mph. 40,000' = @ 660 mph). A 747SP would cruise at Mach .88 / 614 mph.
Wow! The 747 has caught up with its own sound waves and is compressing them to form the boundary region to supersonic flight. This shock wave destroyed the first airplanes that dared to go this fast in the early development of faster airplanes in the 1930s during the "streamlining craze" to make planes go faster. It was Chuck Yeager, who in 1947--who was first to break through that boundary with sustained super sonic flight that did not destroy the aircraft. The compression waves change the refractive index of air that makes the shockwave visible to the eye. Amazing! I have never thought to look for it, but now I will! Awesome!
It's vapor not a shockwave. The aricraft would have to be moving through the speed of sound to produce a wave and no 747 out there will ever come close to that speed. You will see vapor clouds on airplanes taking off all the time if conditions are right. Usually most noticeable on fighters as they take off.
@@AmbientMorality You definitely have experience in this area so I would ask for you to check my math. It's been a while since I went through school lol. I personally think that, in that area of that particular type of 747 wing, I would lean towards vapor vs. wave. We know (you and I and maybe a few other people reading this) depending on a few factors, areas of a wing CAN reach Mach before sharply dropping off. Using the cruise conditions listed for a Boeing 747-400 - airspeed Mach 0.85 (567 mph, 493 knots) flying at 35,000 ft and for the purposes of the calculation, we assume standard atmospheric conditions, we can do TSFOIL calculations and show on the suction side that the airfoil does indeed quickly approach Mach and even shows a slight increase near the trailing edge. Since wing sweep reduces Mach effects, the top speed will be generally be slightly lower I would think. Like, I said, check my math because I could be off. I think what most people are describing would be more along the lines of what what we refer to as supersonic stall. These types of shockwaves are not stable and are dangerous as they appear and disappear, and move back and forth on the airfoil which can cause aerodynamic control malfunctions.
@@dadasaurusrex5461 TSFOIL calculations are 2D and completely ignore engine installation effects that definitely will move the shock upstream. I don't think that's a realistic picture of what's happening here. Also, cruise Mach could be a bit higher than 0.85 for a given flight, etc etc. No reason to expect a small shock in this region would not be possible, though observing it is definitely not common.
I feel like I missed something
Don't see anything
Way back, leading up to Chuck Yegar, The shock wave would move from the front of the wing, which could co super sonic, back to the rear of the wing, and oscillate. The frequency of the oscillation would naturally find the resonate frequency of the wing. This killed lots of very skilled folks. Boeing figured out how to put up with the wave front, and get it to stabilize, where it could go along with the show and not cause too much trouble. This is what you saw,, you are very lucky to see this, thanks to sharing the vid!.
Chuck Yeager
Are you from spider man universe
@warren awesome, thanks
you can always trust a guy named warren for some good aviation stories
Are you talking about the SCRATCH in the inside plexi glass. That moves with your camera movement.
Waste of time try looking at the Shockwave off an F16
Brigadier general Charles (Chuck ) Yeager was an Americian flying ace and test pilot,in 1947 he became the first man to break the speed of sound in level flight.He was from West Virginia and there is an airport there named after him,Yeager Airport.
A great observation of an elusive phenomena, filmed--Chuck Yeager's courage and science contributed directly to the 747 design. The B747 from earliest iterations to the final has always had 'hugely' swept wings, for a commercial airliner (37.5 degrees)... This allowed it to maintain the fastest level cruise speed over any other, at 0.85 to 0.86 Mach and higher. However, due to that more extreme sweep, the 747 emerged from the Engineer's desks with aesthetically beautiful, massive, no longer seen, complex, triple-slotted trailing edge flap arrays that increase the low speed lift of the swept wing at approach speeds, by some 90% over the clean state. I salute the Queen of the Skies--a slide-rule, wind-tunnel and hand calculator design that has now scientifically validated its safety and efficacy for more than 50 years! Why must we passengers be forced off the deleted 747 in favour of carbon resin and plastic un-validated aircraft designs that are now showing multiple composite issues in normal operation?
i saw a wing
Are you sure that isn't a scratch in the window?
Honestly no idea what I'm looking at.
I saw this once on a wing of a 757 and though it was a shadow or something. Crazy.
Didn't see anything
clean your window dude, that shock will disappear
I don't think that's a shock wave. I think it's just an interference pattern within the window itself. Notice there is what looks like a small speck near the engine pylon by the wing leading edge that moves left or right in sync with the movement of the "shock wave" as the camera angle changes --- a real shock wave wouldn't do that.
Actually it is. They're usually easier to spot as a zig-zag on the horizon when viewing it across the length of the wing. I've seen them over the wing of an L10-11 and a B-727. The airplane isn't really in a full transonic cruise but local velocities above the wing briefly exceed Mach 1, just slightly but enough for a small wave.
cool
Got something on the window there...
help, I see nothing ...
A small tornado growing up from the "crack" on the wing, going left and right along the shadow line?
Bruh it's window had a crack not the wing
The Crack is looking like a tornado
First of all a plane wouldn’t fly at sonic speed cuz they are clearly not designed for it. Second, The amount of drag generated would decrease the lift of that plane a lot.
I found fastest 747 is sp, and his max speed is 1000 kmh. Speed of sound is 1234. 8 kmh. Sooo, how is that Shockwave?
Magic
I think it has to do with the airspeed flowing over the wings, I'm not an aerospace engineer, but I do know that the propellers on some planes exceed the speed of sound, thus causing a shockwave.
It isn’t the speed of the plane that matters, but the speed of the airflow over the wings, which is faster than the plane itself. Also, the speed of sound is lower at higher altitudes.
@@xyzxyz_3086 in the case of a "shock wave", the speed of the aircraft matters if it's in the context of a sonic boom. The aircraft's airspeed - not its ground speed. But yes, the speed of sound varies due to altitude in general.
I think that is a real shock wave, the fact that it bends to the forward of the aircraft is because the airflow is slower higher up on the wings
The Greek Crew chief ( I wish I could remember his name) of VP-BAT once told me of this phenomenon on his aircraft. He described it as dancing just aft of the leading edge. Look up VP-BAT's interior. Its a former Pan Am 747SP. Cheers!
Sub sonic airflow vapor mists are not sub sonic shock ways. They are visible vapor flow.
That actually is a shockwave. This shockwave is caused by increased speed of airflow over the airfoil reaching mach 1.
Oh please, General Chuck Yeager was an icon - please spell his name correctly!
This is the coolest thing I'll forget about immediately
Copied
Is the airflow near the speed of sound causing the shockwave?
Yes.
Shadowgraph of the wave actually
That was so exciting I just Sharted! Awesome video keep them coming!!
A mãe natureza tentando desmontar o que nos fazemos....
Looks like Chuck Yegar
Light passing through the wave is diffracted slightly. You're seeing the "shadow" of the wave on the wing surface. The speed of the air over the wing can reach Mach 1 even when the plane itself isn't moving at Mach 1. A typical 747 cruise speed at 35,000' is Mach .86 / 575mph. (Mach 1 at sea level is @ 762 mph. At 35,000' it's @ 679 mph. 40,000' = @ 660 mph). A 747SP would cruise at Mach .88 / 614 mph.
🔴 AWESOME THANK YOU FOR THIS VIDEO 🙋♂️👍👍👍👍
I didnt c ANYTHING!
When it gets to the wing tips that when they tend to rip off
I saw nothing. 🤣
Very nice!
TH-cam algorithm brought me here
I don't see it...
Wow! The 747 has caught up with its own sound waves and is compressing them to form the boundary region to supersonic flight. This shock wave destroyed the first airplanes that dared to go this fast in the early development of faster airplanes in the 1930s during the "streamlining craze" to make planes go faster. It was Chuck Yeager, who in 1947--who was first to break through that boundary with sustained super sonic flight that did not destroy the aircraft. The compression waves change the refractive index of air that makes the shockwave visible to the eye. Amazing! I have never thought to look for it, but now I will! Awesome!
So now they have Wi-Fi on the B747 ?
Why would you need WiFi to record something with your cellphone camera?
wtf
It's vapor not a shockwave. The aricraft would have to be moving through the speed of sound to produce a wave and no 747 out there will ever come close to that speed. You will see vapor clouds on airplanes taking off all the time if conditions are right. Usually most noticeable on fighters as they take off.
The air can be supersonic on the upper surface of the wing during cruise, even if the free stream is subsonic.
@@AmbientMorality You definitely have experience in this area so I would ask for you to check my math. It's been a while since I went through school lol. I personally think that, in that area of that particular type of 747 wing, I would lean towards vapor vs. wave. We know (you and I and maybe a few other people reading this) depending on a few factors, areas of a wing CAN reach Mach before sharply dropping off. Using the cruise conditions listed for a Boeing 747-400 - airspeed Mach 0.85 (567 mph, 493 knots) flying at 35,000 ft and for the purposes of the calculation, we assume standard atmospheric conditions, we can do TSFOIL calculations and show on the suction side that the airfoil does indeed quickly approach Mach and even shows a slight increase near the trailing edge. Since wing sweep reduces Mach effects, the top speed will be generally be slightly lower I would think. Like, I said, check my math because I could be off.
I think what most people are describing would be more along the lines of what what we refer to as supersonic stall. These types of shockwaves are not stable and are dangerous as they appear and disappear, and move back and forth on the airfoil which can cause aerodynamic control malfunctions.
@@dadasaurusrex5461 TSFOIL calculations are 2D and completely ignore engine installation effects that definitely will move the shock upstream. I don't think that's a realistic picture of what's happening here. Also, cruise Mach could be a bit higher than 0.85 for a given flight, etc etc. No reason to expect a small shock in this region would not be possible, though observing it is definitely not common.
@@AmbientMorality Ah, I see. That makes sense.
CHEMTRAILS xD
Was this on an SP?
👍👍
Dave ty that one I could actually see.
It's very shocking.
That shock wave shocks,,, lol.
Don't forget to wave!