Why 10,000 Pounds of Rubber are Stripped From Runways | Cars Insider
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- Опубликовано: 31 окт 2022
- Airport runways are covered in rubber skid marks as planes land and their tires go from stationary to moving. The rubber marks can create hazardous situations as more rubber builds up, reducing the friction needed to safely land a plane.
Rubber removal has become a standard practice on runways to ensure safe landings. We explore the importance of removing the rubber buildup and how it is done.
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Why 10,000 Pounds of Rubber are Stripped From Runways | Cars Insider 
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I am pilot flying into LHR/LGW regularly.
A couple of weeks ago, low cloud forced auto landing at LGW (CAT I STILL requires visual reference even for auto land). UK strips are properly maintained and thanks to the brightness of the lights I acquired visual reference with 60’ to go. Saving going into full LVP saves huge delays, wasted fuel (while aircraft hold) and people’s travel plans.
The difference when going to some countries abroad is marked.
The work these guys do is safety essential. ❤ to them.
FKU
Hi Graham,
Thank you so much! Im mohammad in the video and show videos of behind the scenes on my page !
@@MohammadTaher No thank YOU! I mean it sincerely. I’ll go and check your page too! I’ll see your work in a couple of weeks (LGW-UVF!)
How much rubber accumulates on runways at smaller airports that just don't keep up with rubber deposition? Is there a maximum rubber standard? How unsafe do they become?
@@southparklion I’m going to let Mohammed give his more informed answer, but my guess is the problem is much less acute, because they are much smaller lighter aircraft going in, with fewer wheels. A Boeing 777 can weigh 250 tons on landing and has 14 wheels. A Dash-8 Q400 won’t weigh more than 28 tons on landing and has six. A Boeing 777 approach speed will be around 130-140 kts, a Dash-8 maybe 100-110. And a Dash-8 is a comparatively heavy regional aircraft.
I’m thinking of Southampton specifically. When I was base manager there I think we used to clean rubber once or twice a year (but I’m sure someone will correct me!) and the guys were excellent at cleaning runway lights if we observed they were dim.
Something else about runway lighting: big airports like LHR and LGW have touchdown zone lights buried in the runway as part of CAT III approach systems - such lighting is mandatory for this. They also require centreline lights, typically with 15m spacing. A smaller regional airport has little requirement for such high precision approach capability as the aircraft that serve it aren’t so equipped. As a result they wont have touchdown arrays or possibly even centreline lights. So lighting issues are less acute.
Finally, regional airports just aren’t as busy. LHR has departures and arrivals every minute (or less) at its peak, where’s airports such as Southampton tend to have periods of activity (for example first thing, lunchtime, evening) but the rest of the time are quiet. The sheer volume of traffic is much lower, consequently so is rubber deposition.
For those more expert than I please comment and correct as appropriate!
Even as a private pilot, I never really thought about this before. Fascinating stuff. Respect to those who keep our world functioning.
Wow.
They could've gone into a bit more detail on the actual removal of the thickest rubber on the runway. We see what looks like melted rubber being collected, but they don't really discuss it. They went on too much about the lights.
Alright big time…
gee I’d feel real safe flying with you 😒
@@fifafutwizard7265 privet jet pilots are pilots to..
As airport operations personnel it's always cool too see stuff like this covered for the public to see. So much interesting stuff imo
He hit the nail on the head when he said it's something people never really think about. 10k pounds a day holy cow.
That's five tons!
That's a big lie though, divide that by 100.
@@Iseenoobpeoples Pretty sure at busy airports it is way more than 100 pounds a day but point taken.
@@Iseenoobpeoples 10,000 lbs divided by 1300 daily aircraft movements is about 15 lbs per landing (half of aircraft movements are takeoffs). That aligns rather well with the 20 lbs for an A380 landing quoted in the video.
10k pounds/day is the right order of magnitude.
@@fantabuloussnuffaluffagus 90% goes up in smoke and is not laid on the tarmac.
For people wondering why the wheels on planes don’t spin up before landing, it has to do with the inertia generated by the wheels spinning. It makes corrections by the pilot significantly harder and landing much more dangerous.
they'd be little gyroscopes!
Plus the systems to spin up tires would add extra things that could fail, and need maintenance etc
Ha, always wondered this. Thanks!
@@ThomasBomb45 and weight
I was thinking they should design the tread of the tyre so that the airflow starts them spinning.
But what you say makes sense.
My exact thought answers thank you
One thing I love about aviation is, you will always learn something new.
Very interesting, I never thought about the rubber on runways.
Not only is lighting important for any approach in poor visibility or night conditions, it's actually legally considered to be part of the Instrument Landing System (ILS)
Do you know what is ILS? If not don’t comment on it.
@@NOOne-li1pj AIM 1-1-9 Subpart a (3)(c):
"The system may be divided functionally into three parts:
Guidance information: localizer, glide slope.
Range information: marker beacon, DME.
Visual information: approach lights, touchdown and centerline lights, runway lights."
Right. Even when bringing a plane in on ILS, the pilot needs to be able to see the runway before reaching minimum altitude which is usually 200' AGL. If the field isn't in site by the time minimums are reached, a go around is required.
@@NOOne-li1pj chill my guy
@@NOOne-li1pj He's 100% correct. It says it right in the FAR under what components of a precision ILS exist. You're definitely out of your element Donny.
No idea why I never thought to wonder about this thanks.
As an ILS technician with the FAA, I found this video to be pretty interesting. 👍 I always like when the city takes a runway out of service. Then I have a free window to check up on our systems without additional service interruptions! Thanks city guys! Also, thanks for not scraping my localizer ground-check paint marks off the runway!
what
The thing is though on a normal dry day rubber to rubber contact is very strong and that’s why drag strips, race tracks etc. become more grippy once the rubber from tires has been laid down after tons of laps or runs down the strip. However yes during wet weather it becomes very slick.
Thanks for that clarification regarding the coefficients of friction. I'm just supposing, but I think another aspect of wet runways would be that if an accumulation of rubber is filling the grooves in the concrete, water will not be able to flow off as readily and hydroplaning will occur.
@@MendTheWorld - You are 100% correct - that is a significant consideration as well as the direct reduction in the Coefficient of Friction in such wet conditions!
Thank you for this video. I had never thought of the work involved in maintaining those runaways before but I am now very appreciative of all the work being done "behind the scene" so to speak.
Nice to see someone talk so passionately about how they do their work.
Always watching from Georgetown Guyana south America 🇬🇾🇬🇾🇬🇾
Hebes Chasma, Valles Marineris, Mars 🔴
That was an excellent video.
A rather obscure topic very well explained.
Thank you
My pleasure
Anybody noticed that destroyed plane at 2:24?
It was this accident: "19 May 2013, at approximately 0950 Zulu (1420 local), a C-130J, tail number (T/N) 04-3144, assigned to the 41st Airlift Squadron, 19th Airlift Wing, Little Rock Air Force Base (AFB), Arkansas, ran off the end of a runway at Forward Operating Base (FOB) Shank, Northeast, Afghanistan, struck a ditch which collapsed the nose gear and eventually ripped the right main landing gear from the fuselage. The right outboard engine struck the ground, pressurized fuel and oil lines were broken, fluid was sprayed over the cracked engine casing, and the right wing caught fire."
@@get2dachoppa249 dope 😂
@@get2dachoppa249 Shank...mortar city. Don't miss it.
@@zaffo757 I was at Kandahar for a good while, don't miss it either.
I never thought about what happens to all of that rubber. Thanks much for the information. I used to work at an airport. Good to know.
The normal average person probably would not have known about this! I knew a little because I was in the Air Force for 20 years. Thanks for sharing!
I was the guy that sprayed the cracks so weeds didn't grow, all around the fuel tanks and drainage. I got to be on the runway while a Concord took off, at JFK. Well, extremely close to the runway....
So what becomes of the rubber that is removed?
So interesting, thank you
I have been involved in aviation and have flown quite a bit throughout my life since i was a small child. I never once thought how they maintain the runways. At La Guardia Airport in NYC, they close one runway on a Saturday morning and so maintenance on it. But I never thought what it involves. This is amazing!
Just a thought : Would some kind of low-tech small windmill that drives the wheels help? So that the wheels get up to speed before hitting the ground.
Probably not, when the tires touch down and you see all the white smoke they're getting very hot which makes them stickier and allows for more braking.
The cost benefit isn't there. The additional weight of anything powerful enough to drive the wheels plus the costs for getting it certified plus the costs for ongoing maintenance wouldn't be less than the cost of the reduction in tire wear, and it would probably be minimal compared to what is lost trying to stop how many tons of airplane seconds later anyway
Manual transmission commercial airliners have clutches, the pilot just needs to upshift
This was tried in WW II using pockets on the side of the tire. The problem is that spinning tires become gyroscopes that impede the ability of the plane to maneuver at a critical time
@@briancunningham483 Thanks for the info, that makes perfect sense as to why that hasn't been implemented.
I used to travel by plane a lot. Thank you for your job, guys!
I was totally unaware of all this. I was simply thinking that most of the landing rubber went up in smoke.
Because it's a big lie divide the number by 100
@@Iseenoobpeoples what?
@@leopinty5103 You must have low knowledge about science, I'm I right?
@@Iseenoobpeoples and you have no knowledge about English. You can prove nothing
@@jackcumins6320 I can spot BS when I see it. I speak multiple languages how about you?
Yeah dude like you said, ive literally never thought about this or thought it was an issue. So many things that make our world work everyday.
I might not live around a very busy plane commerce area but I can honestly say this is something I have never actually thought about. Interesting
“How many machines does it take to change a lightbulb?”
“Yes”
What do they do with all the collected rubber?
Maybe they make playgrounds with it
Excellent informative video, critical stuff we take for granted.
It's a big lie divide the number by 100
I knew there was a team of people cleaning between the last and 1st flight,s but didn't ralise how much went into it, thanks for keeping it safe guys.
I never knew this activity before. Fascinating
You learn something new everyday!!!
Nice bit of footage of the Airmen maintaining their runway. 😉
Always wondered about this! And for F1 race tracks as well
Good vid!
lol i did never actually thought of this entire topic. not knew it exists. but it makes so much sence haha great video thanks !
Very interesting, thank you!
I didn't know about this at all ! .... Amazing ! .... 🙂 ....
Simply mind-blowing! Amazing work by amazing people, they keep the world connected in so many ways 👏👏💯👌
Great informative video! Interesting how rubber tires which are grippy make the tarmac slippery
Great video
A Ryanair flight typically deposits 9 to 12 pounds of rubber on a runway
Thanks for your sharing
excellent video
I'm about to travel to Japan and this made me even more grateful for the folks who enable air travel every day
I had no idea. Wow!!!!!
It would be nice to have a system that spins the tires up to landing speed just before touchdown. Then they could save 10,000 lbs of rubber every year, or roughly 38 tires worth.
And waste a whole lot more time, effort, weight on the planes and obviously money both coming up with (and certifying) and maintaining such systems.
The idea sounds nice but if you even think about it for a few minutes, you’ll probably find even more reasons not to
I came across this interesting info researching airplane tires: It's always a sensitive subject when you discuss the causes of accidents, or the fact that retreaded aircraft tires do much better than original ones. Retreaded tires get 30 to 50 percent more landings than new ones
VERY INTERESTING 🧐 THANKS FOR SHARING THIS 🤗💚💚💚
Something else I didn't know. Now I know everything!
Fantastic - I've always wondered where the rubber ends up as vehicles tires wear out. Can the recovered rubber be recycled into new tire compounds afterwards?
FWIW, decades ago a vehicle tire manufacturer looked at the disposition of worn off or shredded tire rubber and concluded about 95% of it stays on the road or within a few meters on either side.
It might be able to be recovered and recycled, but it probably isn't since it is contaminated with a bunch of other stuff also on the runway.
Makes total sense. I never thought to much into it, but those wheels go from not moving … to moving very quickly instantly lol
Very interesting video!
People like him are the type of people who make it to the top. Even though he doesn't need to, he wants the pilots input. That helps the machine of a business run smoother and more efficiently
Interesting!
Best video ever.
Congratulations 👆👆👆, I have a package for you🎁🎁🎁
Satisfying job that
Very interesting video.
It’s with everything’s in the world, that for what’s happening well and right, we fail to notice and estimate how many people have been working to make it right. But we realise them only when something goes wrong. It takes effort and wisdom to see and appreciate what’s contributing to something’s success before it becomes an evident failures.
Amazing of technology
Do they use any method with the air speed to help pre spin the tires before touch down? Or would that much spinning mass do some crazy things for stability?
Same thought. Would save wear on tires. Probably wouldn't want to have motors because of the weight but some air powered turbines on the hub caps wouldn't add much.
They've probably come up with stuff to do that but I doubt it would be cost effective or durable enough.
Had the same question. I'm thinking though that if it were practical it would have been implemented by now considering the complexity of modern jets. I'd like to know if there's a specific reason that it's not done as well. Maybe the additional braking force from the wheels being motionless on landing helps with landing distance? Saves on reverse thruster and wheel braking maybe?
Any extra mechanical solution is another mechanical issue. More service, more malfunctions and so on. Add weight, more pressure on landing gear and more maintenance and service. Also spinning wheels become gyroscopes and make plane harder to maneuver.
They would literally not be worth their weight in fuel to carry.
God bless you for giving us the answer within the first 30 seconds.
So the next plan is better on double runway or double place then,destination could be mantainance the run way or other methode that need double system back up,,thanks,,hhe
Great video. We'll done.
...Traction while landing on a wet runway. Yes, that's an important one at Heathrow airport. I was once in the back of a commercial plane when it landed there during typical wet conditions, I could feel the back of the plane sliding back and forth due to the slick surface. Not a sensation one wants to feel in the back of a plane traveling on the ground at high speeds.
Never knew that. Thank you for sharing very interesting
Congratulations 👆👆👆, I have a package for you🎁🎁🎁
this is where my skills in power wash simulator benefit the most. im gonna apply tomorrow
Very informational. Doesn't seem that Midway in Chicago does it often enough.
I’m an old man, I never knew this! So thanks!
That sounds like a very important and critical job. I think I would enjoy doing this. How does one find a job like this?
Very interesting
Would be curious to know what is done with the rubber that is removed from the runway? It is recycled and made into new tires or other products?
What happens with the rubber that is scraped off the runway?
It’s possible the rubber gets dried out and then recycled along with car tires that are no longer useful.
Cool
If their problem with lights is they cant clean all of them in one night, why not just have interchangeable lights that you could swap in and out, then maintain off-site? They could just quickly swap the lights using pre-existing plug and play technology, then clean the dirty lights, and when the clean lights get dirty, swap them out again. This would also allow quick replacement/repair of damaged lights as well
I don’t think that’s an actual problem…they only clean them twice a week, so they’re not exactly short for time..
It showed in the video they can and do remove lights on a schedule. 3:13 you can see one removed, and 3:52 you can see one in the runway, and see the bolts they undo to remove them. They do maintain then off-site since they can't do all of them at once.
You can’t have ANYTHING which could possibly come loose easily due to foreign object ingestion risks, hence why most maintenance for in-runway lighting is either minor in place things like cleaning, changing bulbs/lenses and such or remove and replace the fixture for off-site service.
never knew how much rubber gets built up. insane
Is it possible and or feasible to spin up the tires before impact to match touchdowm speed? Would this even make a difference or more harm then good?
Any extra mechanical solution is another mechanical issue. More service, more malfunctions and so on. Add weight, more pressure on landing gear and more maintenance and service. Also spinning wheels become gyroscopes and make plane harder to maneuver.
The amount of rubber laid down by a single jumbo jet landing is insane.
It's a big lie divide the number by 100
Safety must 👍
Good
What’s hilarious is that this is the complete opposite of what happens to race tracks, you want the added rubber to the track to make it slick to increase speed and fuel mileage, of course in some racing series they strip the rubber because tire brands want to keep their tire formulas secret
That's the dumbest thing I've ever read. Thanks for the laugh.
@@clayboi6939 what part is dumb
@@loganbaileysfunwithtrains606 well all of it but especially the part where race tracks want to add rubber to thier tracks to make them slick
@@clayboi6939 Race tracks don’t want the added rubber, the drivers want the added rubber. Race tracks will diamond grind the track to add friction and that causes a layer of rubber to form
@@clayboi6939 He’s not wrong. A green track is slower and has increased wear.
See jobs that are important but they never tell you about.
To the people who do this job. You are my heros.
so spinning up the wheels before landing would be beneficial. sounds like a case for "small" electric motors in the wheels. would make taxiing and pushback easier/more efficient as well.
it would not be more efficient. and a small motor would not work for a 70 tonne 737.
"Like trying to fly a plane into a black hole" that's actually rather easy to do since of how big those are and not to mention gravity will assist in the pull in
Why are the wheels of a plane not brought up to speed shortly before touchign the ground? Couldn't a (comparably) small electric motor do this? Or is the exact moment of contact important for decreasing the momentum of the plane?
Excellent 👍🇺🇸 Thank you for sharing this. Mad respect to all the men & women who work hard in the background for us to stay safe 👍👍👍🇺🇸
This guy Mohammad Taher has a small RUclips channel but it’s amazing to see for young aerospace Engineers!
Wonder what happened to that C-130J in the back at 2:25 in the video. It’s all messed up like it crash landed
Always wondered why they didn’t put motors on the plane that speeds up the wheels prior to landing to the same speed as the plane. Would save a ton of money in tires changes and lost time
If you "motorise" the wheels of an aircraft and these pre-spinning wheels touch down at any off-angle to the direction of travel of the aircraft, the aircraft will careen off the runway.
weight. fuel. efficiency
The added weight of the motors would increase fuel consumption.
It has been calculated already and it is cheaper to change tires than to carry extra weight and have extra maintenance of said motors
the main reason is landing on wet runways. That brute first contact helps disperse water and ensure the tires touch the tarmac before the brakes are applied. Spinning wheels make it far more likely to aquaplane.
You need the tires to drag so they can "cut thru" the water.
I doubt that spinning wheels could have enough momentum to have any significant effect on these aircraft, but agreed that they often land with some amount of crab, so the wheels will skid in any case.
I was told the centifugal forces without being under load would shred them to pieces.
So are they able to recycle that rubber or do they use it as fuel somewhere.
I worked as an apron control officer and did runway friction test that was cool but what’s messed up is that I’m just learning on how to remove the rubber I know we didn’t own a machine like and we never removed the rubber I’m now working there anymore but I will mention it to them
Another thought, with lights maybe have a automatic roll-off system built into lights, like motocross racers wear on their goggles. Cheaper way would be tearoff lenses like in mx. We get mud, sand, dirt and rocks slam into our googles stopping you from seeing while doing one of the most dangerous sports. 1 little pull or tear and you have 100% vision again.
Wow I had no idea
Regarding the clip at around 3:00; the Boeing 727 night landing, with the pilot apparently experiencing difficulty in putting her nose on the ground; even appearing as if she were about to sit on her tail; what is that footage from? And what is going on there?
I can usually tell when theres skidmarks by giving things a quick visual before hoisting them back up.
Cool vid. Anyone else notice @2:25 the crashed C130?
Why not use motors to get the wheels moving to the required speed while making a landing? Can save costs and make it more safer for landings?
If this is such a problem, why are not wheels made to rotate in synchrony with the aircraft landing speed no there is minimal friction when the wheels make initial contact with the runway?
How much rubber can be saved by accelerating the wheels before landing and hence reducing the friction?