DurangoMac From United States of America, joined Dec 2006, 586 posts, RR: 0 Reply 1, posted (4 years 2 months 2 weeks 1 day 17 hours ago) and read 17810 times:
I've heard from others that it's the dust from the brakes and the brakes being worked a little to hard before take off. I do admit it seem a little excessive but I've seen other photos with the same thing happening.
Skytony From United States of America, joined Sep 2005, 145 posts, RR: 0 Reply 2, posted (4 years 2 months 2 weeks 1 day 17 hours ago) and read 17798 times:
I am going to guess brake dust from the landing gear.
Lower your expectations! You will always be pleasantly surprised!
Airbuske From United States of America, joined Jun 2007, 463 posts, RR: 0 Reply 3, posted (4 years 2 months 2 weeks 1 day 17 hours ago) and read 17772 times:
Yes, I also think it has something to do with the brakes. Just after I replaced the front brake pads and calipers on my car, I had stopped at a red light and noticed smoke coming out of my tires. My friend assured me that that was normal because new brakes have to "wear in".
Hopefully someone can give you a more precise answer.I'm curious true
HAMAD From United Arab Emirates, joined Apr 2000, 1157 posts, RR: 7 Reply 4, posted (4 years 2 months 2 weeks 1 day 17 hours ago) and read 17764 times:
Quoting Airbuske (Reply 3): I had stopped at a red light and noticed smoke coming out of my tires. My friend assured me that that was normal because new brakes have to "wear in".
brake dust! wow, i guess thats why my wheel rims have been always getting black after i replaced my brake pads
thanks for the info guys
BMI727 From United States of America, joined Feb 2009, 14356 posts, RR: 26 Reply 5, posted (4 years 2 months 2 weeks 1 day 17 hours ago) and read 17730 times:
Quoting Airbuske (Reply 3): Yes, I also think it has something to do with the brakes. Just after I replaced the front brake pads and calipers on my car, I had stopped at a red light and noticed smoke coming out of my tires. My friend assured me that that was normal because new brakes have to "wear in".
It's the same stuff that turns the rims on your car black. Sometimes you'll see a car with disc brakes in the front and drums in the rear which will have front rims several shades darker than the rears due to brake dust.
Why do Aerospace Engineering students have to turn things in on time?
A lot of aircraft automatically apply brakes to stop the wheels from spinning just before retraction. One reason for this is to minimise forces on the landing gear structure as it retracts due to gyroscopic precession. I suspect another reason is to minimise the chances of damage occurring to wheel well components.
Regards, JetMech
JetMech split the back of his pants. He can feel the wind in his hair.
AcNDTTech From United States of America, joined Jul 2008, 338 posts, RR: 0 Reply 7, posted (4 years 2 months 2 weeks 1 day 17 hours ago) and read 17634 times:
DocLightning From United States of America, joined Nov 2005, 16831 posts, RR: 57 Reply 8, posted (4 years 2 months 2 weeks 1 day 16 hours ago) and read 17577 times:
Quoting JetMech (Reply 6):
A lot of aircraft automatically apply brakes to stop the wheels from spinning just before retraction. One reason for this is to minimise forces on the landing gear structure as it retracts due to gyroscopic precession. I suspect another reason is to minimise the chances of damage occurring to wheel well components.
The result is a puff of smoke as dust from the wheels comes off.
Mascmo From United States of America, joined Mar 2008, 93 posts, RR: 0 Reply 9, posted (4 years 2 months 2 weeks 1 day 15 hours ago) and read 17410 times:
Now don't you just wish your car could shed brake dust like this?!?!
HAMAD From United Arab Emirates, joined Apr 2000, 1157 posts, RR: 7 Reply 10, posted (4 years 2 months 2 weeks 1 day 15 hours ago) and read 17378 times:
Quoting Mascmo (Reply 9): Now don't you just wish your car could shed brake dust like this?!?!
NOT
given the size differences, would airplane break pads be manufactured with the same material car pads are?
SFONative From United States of America, joined Jan 2008, 209 posts, RR: 0 Reply 12, posted (4 years 2 months 2 weeks 1 day 14 hours ago) and read 17170 times:
Quoting BMI727 (Reply 5): It's the same stuff that turns the rims on your car black. Sometimes you'll see a car with disc brakes in the front and drums in the rear which will have front rims several shades darker than the rears due to brake dust.
Usually the case on most cars since the front brakes always work the hardest regardless of the brake setup.
Quoting Mascmo (Reply 9): Now don't you just wish your car could shed brake dust like this?!?!
That I do. In my experience, I see it as the mark of a true German sports car! Just kidding, It is actually self applying sun block to protect your wheels from fading.
4EVERVARIG From United States of America, joined Jan 2009, 66 posts, RR: 0 Reply 17, posted (4 years 2 months 2 weeks 1 day 6 hours ago) and read 14213 times:
Quoting JetMech (Reply 11): given the size differences, would airplane break pads be manufactured with the same material car pads are?
Although in theory, airplane brakes work similarly to your car's ABS braking system, airplane brake pads are designed to withstand a higher temperature...if I am not mistake above 1000 degrees, to ensure that they do not fail. Remember that we are dealing with an aircraft which is bigger and much heavier than a regular automobile and also take into consideration the speed and engine thrust into the equation.
There was a special on Discovery Channel the other day where they showed the inner workings of an aircraft brake and tire. Many of the tested items failed on the simulator as they caught fire when tested to the limit. They showed how much heat the break pads withstand as they were glowing red hot on the simulator.
N405MX From Mexico, joined May 2004, 1378 posts, RR: 11 Reply 18, posted (4 years 2 months 2 weeks 1 day 6 hours ago) and read 14213 times:
Brake Dust, usually when the gear retracts, wheels brake to stop spinning before entering the wheel bay, so they don´t cause any damage, the nose gear has no breaks, but in the bay there are two steel plates that stop the wheels when they enter the bay; because of the high speed air passing thru the wheels, it blows the dust away.
Something similar happens to your car brakes, but usually the brake dust covers your wheels (rims) and the brake calipers.
Best Regards
[Edited 2009-03-12 09:20:28]
Life is what happens when you have other plans.....
4EVERVARIG From United States of America, joined Jan 2009, 66 posts, RR: 0 Reply 19, posted (4 years 2 months 2 weeks 1 day 6 hours ago) and read 14170 times:
TK787 From United States of America, joined Jan 2006, 4108 posts, RR: 13 Reply 20, posted (4 years 2 months 2 weeks 1 day 5 hours ago) and read 13674 times:
AA777223 From United States of America, joined Feb 2006, 1113 posts, RR: 7 Reply 21, posted (4 years 2 months 2 weeks 1 day 5 hours ago) and read 13594 times:
Quoting 4EVERVARIG (Reply 19):
Nope, like in the United States, the French Air Force takes care of their airplanes, including cleaning and maintenance.
I think he was referring to the dirtiness of the aircraft in question...
413X3 From United States of America, joined Jul 2008, 1983 posts, RR: 0 Reply 22, posted (4 years 2 months 2 weeks 1 day 2 hours ago) and read 10112 times:
Quoting 4EVERVARIG (Reply 19):
Nope, like in the United States, the French Air Force takes care of their airplanes, including cleaning and maintenance.
it was a friendly jab at the awful appearance of both the national carrier and the air force of that country
Legacytravel From United States of America, joined Aug 2005, 1067 posts, RR: 2 Reply 24, posted (4 years 2 months 2 weeks 22 hours ago) and read 5494 times:
Quoting HAMAD (Reply 4): i guess thats why my wheel rims have been always getting black after i replaced my brake pads
thanks for the info guys
The car pads should not show dust until they are starting to wear pretty bad. They will smell and smoke a bit but they should be letting off dust right away.
Try a brake pad with gold in them. They are the best and they onlu cost about $35-50 USD for a front set.
I sed to work in auto parts many eons ago when I had a full head of hair and was 50lbs lighter .
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