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Aeroflot deactivates brakes on nine aircraft, relies solely on reverse thrust

aeroxplorer.com

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Re: Aeroflot deactivates brakes on nine aircraft, relies solely on reverse thrust

#331

Post by piskov »

throwaway290 wrote: post #273
piskov wrote: post #195

Earlier quoted context omitted.

The story looks like a penny dreadful of “Russia is doomed” series. 1. There’s no info on that Russian slide about actual planes flying without any breaks at all. There’s a manufacturer defined minimum equipment list that allows planes to have some breaks (actual number depends on the type of a plane) disabled for, let’s say, 10 days at the most. This is absolutely normal as planes cannot be serviced constantly (they…

As a Russian I'd say this guy lives in some other country. Probably imaginary. Based on how little reality there is in the comment I would not believe comments about airplane brakes either... Not a single person I know much less their kids has "foreign crypto virtual cards" etc. Ofc even if they had they would be locked out of transacting with any serious business that doesn't take crypto. The exodus is real, ask Arm…

> crypto virtual card

The cards are not “crypto” — they are very much ordinary virtual (or even physical) visa/mastercard ones.

You use p2p crypto to top-up them with real dollars from RUB.

It takes around 5 minutes to get a virtual Visa card. And if you want to get a physical one (for traveling), there are a lot of countries (even NATO ones) where you can get one with no problem at all.

> any serious business that doesn't take crypto.

Again, you’re not paying crypto. You use ordinary cards to pay in any store that you like.

Re: Aeroflot deactivates brakes on nine aircraft, relies solely on reverse thrust

#332

Post by piskov »

EVa5I7bHFq9mnYK wrote: post #246
piskov wrote: post #195

Earlier quoted context omitted.

The story looks like a penny dreadful of “Russia is doomed” series. 1. There’s no info on that Russian slide about actual planes flying without any breaks at all. There’s a manufacturer defined minimum equipment list that allows planes to have some breaks (actual number depends on the type of a plane) disabled for, let’s say, 10 days at the most. This is absolutely normal as planes cannot be serviced constantly (they…

About the foreign virtual cards, can you please give me a link where I can get one? Being searching for a long time, only found scam. All legitimate ones require proof of address.

If you’re Russian, you will easily find the instructions how to get one

If you’re not, then it’s prudent not to tell any actual “names”.

Re: Aeroflot deactivates brakes on nine aircraft, relies solely on reverse thrust

#333

Post by saiya-jin »

wolverine876 wrote: post #145
foverzar wrote: post #122

Earlier quoted context omitted.

And that is exactly "klyukva leaking into seemingly serious reasoning" I was talking about here: https://news.ycombinator.com/item?id=37041836 There are myriad of reasons why this is not realistic, but if I were to pick the most obvious, that would be 1. No, there is no "complete control of the media", IDK why people assume it to be the case. Broadcast federal tv has to be politically correct, but not too much beyond…

> No, there is no "complete control of the media", IDK why people assume it to be the case. Broadcast federal tv has to be politically correct, but not too much beyond that. How do you recocile that with the journalists assassinated, arrested, and/or driven from the country?

That's some control. One example - last year one brave lady from TV staff protesting IIRC via banners against the war in state TV. I hope she is still alive and well (for that part probably outside of russia).

Of course the ultimate goal would be total control, so they counter similar situation (or putaine giving some speech live in tv) with ie 1 minute delay to counter any 'mishaps'. So they are going there, but slowly, ineffectively, at least for now.

Russian state can't unroll all freedoms immediately, their main goal was to paint war as "nothing is happening, just minor security cleanup". Putaine's clique is, just like any dictator, scared shitless of people revolting en masse, there is nothing more important for them than keeping the power and stealing all those juicy billions in resources and services flowing. But for majority of russians to revolt, they would have to go quite a bit beyond FUBAR, population is trained with patriotic spin to suffer incompetence of its leaders for generations.

Re: Aeroflot deactivates brakes on nine aircraft, relies solely on reverse thrust

#334

Post by piskov »

xp84 wrote: post #134
tguvot wrote: post #130

Earlier quoted context omitted.

they don't have proper specs, manufacturing equipment, materials, engineers, machinists, etc. they been trying to source parts from india, china, iran, etc.

For sure, they will be using half-butted homegrown (or made in those countries) clones, just like you would see in the Soviet era. It will lead to a gradual but increasing incidence of air disasters. Russian friends, please avoid flying if you can.

You’re talking like Russians are the people living in some Stone Age :-)

“half-butted homegrown clones for parts”, my ass. How about an actual brand new twinjet airplane with carbon fibre reinforced polymer wing (consumes less fuel then Boeing/airbus alternatives) like https://en.wikipedia.org/wiki/Irkut_MC-21

Re: Aeroflot deactivates brakes on nine aircraft, relies solely on reverse thrust

#335

Post by eesmith »

stef25 wrote: post #303
eesmith wrote: post #300

Earlier quoted context omitted.

> unimaginable stress It's quite imaginable. Already "most of the work of stopping a commercial aircraft is done through the use of thrust reversers", so it's not all that more than they do now. > We can't see the fact that the engines are about to explode, There's nothing magical about thrust reversers which make it impossible to inspect for increased engine wear and tear.

Is it kind of like shifting down gears in a car to slow down?

No, it's not like engine breaking (see https://en.wikipedia.org/wiki/Engine_braking for a description of why that works).

https://en.wikipedia.org/wiki/Thrust_reversal describes thrust reversal nicely:

> On aircraft using jet engines, thrust reversal is accomplished by causing the jet blast to flow forward. The engine does not run or rotate in reverse; instead, thrust reversing devices are used to block the blast and redirect it forward.

Take a look at the video of "A target-type thrust reverser being deployed" for an example.

Re: Aeroflot deactivates brakes on nine aircraft, relies solely on reverse thrust

#336

Post by SergeAx »

My friend is a private jet pilot, but also partially trained for commercial jets. He says that the article content is a nonsense. Here's his words, translated:

The plane is always using brakes. Reverse thrust reduces landing distance by about 15%, and its main task is to reduce the load on the brakes and prevent overheating of the pads (which lose their effectiveness at high temperatures) and wheels (which would otherwise blow the fuse and release air from them, to prevent explosive destruction). All landing distances that are indicated in the manual and that are calculated by the [onboard] computer are calculated for serviceable brakes and WITHOUT taking into account the use of reverse thrust.

With “brakes disabled” - how can you be sure that you will stop within a runway of a given length? There is no such data, no one has tested it. There are procedures for brake failure, but this is an emergency, there are no landing distances for these procedures, and in any case, pads are still used for emergency braking (it’s just that compressed air/nitrogen is supplied to their actuators instead of hydraulic fluid).

Re: Aeroflot deactivates brakes on nine aircraft, relies solely on reverse thrust

#337

Post by AndrewKemendo »

nvy wrote: post #260
AndrewKemendo wrote: post #232

Earlier quoted context omitted.

Ah I see, I had envisioned a pad that was replaceable like an individual brake pad on a car

I'm most familiar with the C-130 but I believe it's common on many types: the pad is replaceable but in order to do that you have to remove the entire brake assy, which means it's more efficient to just slap a new assy on and send the worn one to 2nd line to be rebuilt/overhauled. Often that 2nd line is subcontracted out.

>Often that 2nd line is subcontracted out

As is tradition. Thanks for the insight

Re: Aeroflot deactivates brakes on nine aircraft, relies solely on reverse thrust

#338

Post by genocidicbunny »

saiya-jin wrote: post #306
samtho wrote: post #256

Earlier quoted context omitted.

> or unless someone local can manufacture them to the correct specs This will likely happen except for the correct specs part. Sure, it will be manufactured to fit, but it likely won’t be able to be made to the same standard as the official Boeing part. The impact of this could be absolutely nothing, or maybe Aeroflot planes just end up on runway excursions more often. It could also lead to catastrophic failure and s…

Aeroflot was widely regarded as worst international airline (on par with say Nepal airlines but for very different reasons) way before any invasion started. Typical russian mentality and alcoholism is simply not a good match to highly structured and regulated environment of very complex machinery. Everybody I know tried hard when travelling from Europe to Asia to avoid using them, even when they were often the cheape…

There's a reason that passengers on Aeroflot used to applaud a successful landing.

Re: Aeroflot deactivates brakes on nine aircraft, relies solely on reverse thrust

#339

Post by 3LazTjBv-f »

martin8412 wrote: post #230
fbdab103 wrote: post #215

Earlier quoted context omitted.

I am more surprised there is not a sufficiently rich black-market operation going around sanctions. Random site[0] says, >In general, airplane brakes can last between 1000-2000 landings before they are changed. An active airplane makes an estimate of two landings per day; this means the airplane needs to be changed after 18-36 months. Even at multiple brake pads(?) per plane, that does not sound an insurmountable amo…

Black market from where? If caught selling parts to Russia, you'll be banned by Airbus and Boeing, meaning you can't maintain your own fleet.

There is a significant amount of goods moving via Georgia. To be exact they move them from Georgia proper to part occupied by Russian separatists. That is totally different from smuggling stuff to Russia. Exports from Germany to Georgia were something like 50% up year to year.

How strict is that manufacturers' control over spare parts?

Re: Aeroflot deactivates brakes on nine aircraft, relies solely on reverse thrust

#340

Post by nielsole »

kakwa_ wrote: post #315
throwaway2037 wrote: post #285

Earlier quoted context omitted.

You raise an interesting point. How does Iran, Cuba, and Syria get parts for any Boeing or Airbus civilian aeroplanes? Or are they all flying Russian aircraft now?

Iran (Iran Air and Mahan Air) is flying mostly Airbus and Boeing, but really, really, really old planes. Given these are rather old planes, with a wide international distribution, I'm kind of expecting it's not too hard to find second hand parts cannibalized from retired planes and coming from neutral countries. They were even able to smuggle parts to keep some of their F14s flying. In comparison, civilian airliner p…

TIL Iran has 40 F14 fighters. I would have assumed the US to keep closer tabs on their hardware, but they got exported pre-revolution.
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