Special Techniques to Cool Aircraft Brakes After Hard Landing
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- Опубліковано 23 чер 2022
- Welcome back to the Fluctus Channel for a feature on the measures and precautions taken to ensure safe landing of commercial aircraft.
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hard landings have noting to do with brake temperature.
Exactly what I thought if anything the harder the landing cooler the breaks as more speed is scrubbed off on impact
@@rcblitzfpv8346 I think they mean as fast landing resulting in a hard landing on the brakes
@@rcblitzfpv8346 ehh not really. the firmness of the landing has no real effect on brake temp. the landing groundspeed does effect brake temp, but landing groundspeed doesn't play a big role in the quality of a landing.
@@andrewbatistoni5779 that's exactly what I said
maybe he meant hard braking.
Such convincing presentation but lacks accuracy. Plus the transitions to other unrelated topics are just unnecessary
“Landing an aircraft involves reducing altitude”
Are you sure? I’m listening…
Actually, more firm landings are preferred when the runway is wet. Reduces the risk of hydroplaning
I used to work at Boeing Everett where wide body twin aisle aircraft are produced. I can still remember the first time I saw a complete disk brake assembly inside engineering building. It was huge and had about 6 or 7 different brake disks and calipers with brake pads. Each tire/wheel has something like this. When they do destructive testing for certification, brake disks and caliper pads are destroyed and will be replaced. Cost a cool million dollars for each test.
"When they do destructive testing, things are destroyed" Well, yeah...
They are called brake assemblies. In the old days and on the F-4. The brakes was not as a assembly. You had to physically remove a rotter disk , a stater disk and so on. Back then the rotter was steal plate. Now its carbon. On a Gulfstream to replace just one brake assy cost 120K and a Gulfstream has 4 of them.
@@ximenoworks Thank you. When I first saw one, I wasn't sure what it was. I asked one of the engineers in work-group. He came over and explained it to me. I think they were carbon fiber. I can't remember if brake assembly was before or after destruction test. I walked away thinking how great to have that on my car - LOL.
@@martinc.720 Thanks, yeah brakes get 'cooked' in the destructive test. Also, not uncommon for tires to blowout. New safety systems help protect tires a little bit.
Too bad they can't add cooling systems on brakes. Squirting liquid Nitrogen would cool them and not support combustion. But maybe cool too much and cause brakes to fly apart.
I'm glad I'm not writing the checks for these destructive tests. When I was at Boeing Everett, they had huge test fixtures to put wings and fuselages under extreme loads. Data captured helped make better and safer planes.
@@SJR_Media_Group We get it, you know stuff.
All I did was pointing out that you said “They destroy stuff when they destroy stuff”. I mean…
The BA landing at 1:20 is in Mauritius. This is unmistakable. I love my island! 🙂
You showed a 757 when you were talking about a 767
I hope it did not cause you to misunderstand the storyline
@@martinc.720 nah, but your double negative did.
@@whatweather😂🍻🤣
@@whatweather At which do you most can't the least?
@@whatweather difference between 2 negatives and a double negative.
Imagine thinking you’re an engineer because you watch UA-cam
They throw numbers around all day on these videos
Hard landings don't affect brake temps, high speeds do. Also trains have nothing at all to do with aircraft brakes. What are you guys doing?
Talking shit for masses :)
The tire thread never reaches 400 deg. If it does, the rubber would have melted. It's the brakes that reach those temps.
BS! Hard landings do not cause wheel fires! It's HARD braking that causes the brakes to HEAT UP, and "CAN" cause the wheel fuse plugs to release tire nitrogen pressure. Your research and video is flawed with incorrect data!
Where are your videos and correct data, Captain Geardown?
just wanted to write the same. A hard hit on the tire will not overheat it...
I enjoy all the videos always interesting educational
Amazing video
How did I end up watching train axles?
One of my favorite jobs
So with this special technique involves the airport fire trucks spraying a mist of water on the brakes and tires. Wow, how special.
👌 Excelente
In the past , tires exploded and seriously injured the first responding firemen.
Cool video thanks bro 😎
THANKS FOR THIS VIDEO SIR , Abdul Rashid WAZIRABAD PAKISTAN💖
Trains have nothing to do with "Special Techniques to Cool Aircraft Brakes After Hard Landing"
Spirit should watch this.
5:33 MULTIPLE stacked disks/pads/ Ginormous caliper !
Please make videos as per the subject, don't mix rail with aircraft
"Rail"??
Gears: is soooo hot cool down machine: no worry am here😅😂😂😂
Wheels are checked thoroughly while tires must be rejected.
There is also a condition called pyrolysis that might cause a tire explosion....
We could have used these ideas on the F-101.
Why would you get near hot brakes in the first place!
I thought planes flew on rail tracks after NO2 powered grinders had quarter miled😮
As an air force aircraft maintenance professional, we monitor for hot brakes.
ok
Nice to see how to cool aicraft brakes on a train carriage! Go lost!
7:22 _Ground._ The past tense of "grind" is "ground." The fact that "ground" is the present tense of two or three other verbs is irrelevant.
Heather Ross' wife must be proud of her!
You can cool brakes leaving the landing gear down n the next flight just few minutes with reduced speed when climbing. I ve done that
Airbus got brake fans built in.
5:41 Almost 220PSI=15BAR !
Why would hitting the runway hard cause the brakes to heat up more than when hitting it normally?
No, but they could damage parts of it. The script is not particularly lucid.
says 767 and shows 757
Most informative video - Thanks
Lmao fuck no
As an automotive guy I find it odd that they have to cool the brakes. We use vented rotors so that air cools the brakes while moving.
The temperature is significantly higher. But, under normal circumstances, the break cooling is more so the plane can take off on time. The temperature has to be below a certain point before takeoff in case of a rejected takoff. Also, after an aborted takoff, it lessons the wait time
jets use carbon brakes. and they use stacked brakes that would look like a 5 layer clutch you might find in a motorcycle, a layer of "rotor, a layer of friction material, alternating. the calipers are 360 degrees around the whole wheel. the surface area of braking per exposure to wind-stream is much less than cars have, especially after landing. its not uncommon for brake temps after one landing to hit 300C to 500C possibly higher in abnormal situations. carbon brakes perform best in the middle of the temp range, on aircraft. unlike steel rotors with ceramic/semimetalic pads, they work better as they get hotter to a point. but after that point they start to lose performance quickly. so before a plane can take off again, after landing the brakes need to cool to a point where they can stop the plane in a rejected takeoff. This is likely the most demanding thing that can occur to aircraft brakes.
Upon landing, they have approx 10,000-50,000 times the amount of energy that needs converting to heat, as opposed to a car at motorway speeds. All of that has to happen in approx 30-50 seconds...
@@andrewbatistoni5779 are you sure hard landings arnt worse for the brakes 😂😂😂
I think the heat is produced because of the stagnancy of the wheels while touching the ground due to friction. If the wheels rotates at least for a while, the heat usually produced may be reduced I think. In order to achieve this effect, the outer wheels may be so designed as if they are designed in a turbine (Fan type)so that the air power may rotate the wheels and therby reduces heat on wheels.
Also know as Ryan Air
How do you attach that in the air ???
when the plane is going 500 mph cooling isnt an issue. some planes dont have landing gear well fairings. others have ways of cooling the tires in flight using cool air. Airbus 321 neos even have brake fans built into the wheels.
You don’t mention the fact that nitrogen, instead of air, is used cause it is not flammable. You don’t want that burst of air blowing onto the hot brakes when the brakes get hot when the fuse plug melts.
Nitrogen is used in tires because it expands and contracts with temperature change less than air does so the tires stay the same pressure in different temperatures, and nitrogen molecules are large so permeate through rubber less, and also the lack of oxygen prevents oxidation of the rubber inside the tire, it has nothing to do with fire.
Air is also not flammable
왜 야간에 비행하는 여객기 엔진 배기구에서 불꽃이 나오지 않나요?
Video is damaged , it switched to trains and had nothing to do with brake cooling.🤣
Special Technique = spray water with hose...
Boeing 767. Shows Boeing 757
Okay you switched from airvrafts to trains and Im failing to see the connection here.
.pertiwi
Doesn’t nitrogen aid in cooling the tires? There was no mention.
The nitrogen that would be released from the tires via the relief valves wouldn't be able to cool the brakes. There's just not enough gas in the tires to provide any noteworthy cooling effect, even if you could direct the flow of gas directly at the brake stack.
Additional job for ground handling😩
Hard landings have zero effect on brake temperatures. Higher than normal brake temperatures happen when the aircraft is overweight, aborted take off, flat tires and other mechanical failures.
U Said 767 and showed a 757
Brakes produce sparks? Do they have pilots look at this crap before they put it out there?
Who needs pilots when they have a UA-cam-certified fact checker?
I dont know what this video wants to be lol
That is "lol" funny because?
More poor reporting, full of miss infomation.
No, you do not apply brakes at touchdown (big planes) and hard landings do not cause brake overheat. Misuse of the brakes is what causes overheating. This whole video is bogus.
The lack of knowledge of this videos creator is astonishing.
Fun fact the 747 at 0:55 Boeing was testing the plane for aborted take off after reaching rotate speed