A350 brake dust (OC)
Posted by Fast-Equivalent-1245@reddit | aviation | View on Reddit | 51 comments
was attempting some night panning shots ar CDG and got lucky with the beacon flashing red just as the brakes applied before retraction. thst is some brake dust right there.
Ecthelion-O-Fountain@reddit
Looks like smoke honestly. Never seen that before ever
Fast-Equivalent-1245@reddit (OP)
Quite a fee saying it isn't brake dust...curious what it could be.
Ecthelion-O-Fountain@reddit
Somebody suggested a stuck brake and I could believe that.
Fast-Equivalent-1245@reddit (OP)
That makes sense. It was right when you would expect the brakes to be applied on rotation. Thanks for the reply.
Ecthelion-O-Fountain@reddit
Can you explain what you mean by that? Brakes don’t get applied after takeoff roll begins
Fast-Equivalent-1245@reddit (OP)
I mean that brakes apply before gear retraction to stop them spinning. You often see a puff of brake dust just before the gear starts to rise.
Ecthelion-O-Fountain@reddit
Gotcha
Gastroid@reddit
Wonder if they powered through a stuck brake.
Ecthelion-O-Fountain@reddit
That would make sense actually. You wouldn’t even feel it probably.
genetichazzard@reddit
That's not brake dust
Fast-Equivalent-1245@reddit (OP)
Replying on this comment, but others have said the same. What do you think it is? It was brief and right around the time that they would apply the brakes to stop spinning before retracting. It is a lot...so now genuinely interested what it could actually be.
fanofairplanes@reddit
Pretty sure they aren't using the brakes during takeoff
5cheinwerfer@reddit
The brakes are applied before they retrack the wheels into the fueselage. You dont want spinning rubber inside of an aeroplane.
mattrussell2319@reddit
Steveo1kinevo - tap the brakes …
fanofairplanes@reddit
Yeah that makes total sense, thanks
Fuck_Flying_Insects@reddit
Just in case you wonder about these things like I do, the brakes apply automatically, so no input required from the pilots.
italianthestallion@reddit
No he’s definitely right. The amount of friction to stop wheels with no weight on them is basically zero for a system that is designed to stop that plane at the speeds it’s meant for. No way stopping them in the air creates that much dust.
ProcyonHabilis@reddit
I'd be surprised if you get much brake dust from simply stopping a spinning wheel though
praetor450@reddit
Yes it’s true you don’t want the tire spinning inside, in case they are torn you don’t want flaking material causing damage to components inside the wheel well.
However, the tire rotation is stopped so that there is less stress of the gear and retraction mechanism as it’s retracted from gyroscopic forces from the spinning of all those tires.
joe_quetzal@reddit
they are taking off why would that be brake dust??
BB-68@reddit
European vehicles 🤝 excessive brake dust. Name a more iconic duo.
Source, I drive an Audi
Bdis3@reddit
First thing I thought of was “must have the same bakes as my S4.” The stock pads are egregiously dusty.
ExtraGlutenPlzz@reddit
My S4 dusts like a mfer its crazy. Still on oem pads and rotors. Have brembo pads and rotors going in soon, hoping its a little better but also not a huge deal
Omniwar@reddit
Within my car circle brembos are colloquially referred to as "brownbos" because of the brake dust. Certainly is true on my camaro 1LE. I'm sure it mostly depends on the pads you use though.
ExtraGlutenPlzz@reddit
I don't know which street pads to run that have little dust, and don't have that initial bite that is so aggressive as oem. I don't like that initial bite, I prefer a smooth linear bite.
Bdis3@reddit
Post in the S4 sub once you get everything on!
ExtraGlutenPlzz@reddit
I'm a regular there and r/audi, and S5
SaigaExpress@reddit
Apparently the fl5 type r’s stock pads are really bad too.
BB-68@reddit
I can't wait until I need to do the brakes on my S5. Akebono ceramic pads incoming
kevindebrowna@reddit
Akebonos can be tough to get used to if you haven’t had em before. But I run them on all my cars
Bdis3@reddit
You and me both buddy!
ExtraGlutenPlzz@reddit
Same
finch5@reddit
I drive an EV now. 55K miles and the original brake pads it came with are just there chilling behind mostly clean rims.
No_School_6290@reddit
Same same. Just had my brakes checked on my 8.5 year old EV with 109k miles. Original and pads still more than halfway.
Allaplgy@reddit
Heck, I bought a '96 Jetta about 8 years ago. Had maybe 5mm left on the pads. Finally changed them a couple years ago, after another 40k or so, had maybe 4mm left on the pads. Downshifting ftw!
JaviSATX@reddit
Can confirm. Source: Two Volvo’s, and a Volkswagen.
this_is_bs@reddit
Seems like a lot. Could it also be a water vapour effect due to the heat from the brakes?
Ruepic@reddit
My dad told me back in the day they would ride the brakes a little bit on take off to prevent icing. Not sure if they still do that.
PinguProductions@reddit
They absolutely do not
Ruepic@reddit
Carbon brakes on the 146 would absorb moisture so they would ride the brakes a lot.
Ruepic@reddit
This was back when he flew a Navajo, company procedure at the time was to ride the brakes to evaporate any moisture, there would be times where the wheels would be frozen when touching down on a contaminated surface resulting in loss of traction.
pattern_altitude@reddit
Don't think that's a thing.
They do tap the brakes prior to retraction in many cases to stop the wheels from spinning.
BagOfMoneyNoChange@reddit
Absolutely not. Nobody is tapping the brakes on a jet before retracting.
flightist@reddit
That’s typically automatic (in conjunction with selection of gear up) on large aircraft, and almost certainly what’s going on in the image.
Ruepic@reddit
This was back when he flew a Navajo, company procedure at the time was to ride the brakes to evaporate any moisture, there would be times where the wheels would be frozen when touching down on a contaminated surface resulting in loss of traction.
Due_Street1464@reddit
I wanna sniff it and rub the elements to char to coat
BTM65@reddit
100% NOT brake dust.
Blown tire or dragging brake.
harambecats@reddit
Could be the brake fans blowing the dust
nothingbutfinedining@reddit
I would not be surprised if that’s a hydraulic leak at the brake
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