4 hours ago, paulyg123 said:

I have the ground crew on speed dial.  I always toast the brakes after every landing. I have the Saitek foot pedals.  Yes, autobarkes do the trick, but nothing like stomping on them yourself.  I noticed if I only apply the brakes 1/2 way, I get the asme braking power and don't cause over heating.    Try applying them 1/2 way.

This is a quirk of your flight simulator software and/or hardware settings and not what will actually happen, because the amount of manual braking on the real aircraft is determined by the amount of brake pedal deflection.  In addition, each main gear wheel is provided with antiskid protection which under normal conditions will automatically reduce the brake pressure if the sensor detects any skidding.  There is also touchdown and hydroplaning protection which works off inertial groundspeed, as well as locked wheel protection. 

One thing for sure, Paul, is that you wouldn't be very popular handing over your aircraft to the next crew after toasting the brakes, especially after landing at places like Nairobi or Jo'burg!  The brakes are the primary means of stopping the B744 aircraft and starting a flight with hot wheels and brakes should be avoided at all costs, because they can become an even bigger problem in the event of a subsequent RTO.  Incidentally, there has been much discussion about the best and safest way to stop the aircraft during a RTO and it is still a hot subject (excuse the pun).  If we look at the rejected takeoff case and consider applying just the brakes (i.e. ignoring the application of reverse thrust and speedbrake), some airlines train their pilots to let the RTO autobrake do its job, whereas others train their pilots and test them on instinctively applying maximum manual braking (which will of course disconnect the RTO autobrakes).  Now there's a thought for you the next time you get a brake overheat!     

Edited December 17, 20187 yr by berts

About brakes in Holland...

 

Hello fellow simmers,,

I just read that in Eindhoven (EHEH) people were complaining about the noise around the airport.

So, it was decided that planes will from now on - if it is the last flight of the day for that particular plane - not use reverse trust, but only brakes.

Since it is the last flight of the day, the brakes have time to cool!! 

Keep the neighbours happy!

 

 

 

Edited December 20, 20187 yr by wijnand
typo

I do the same at MAN on arrivals from deep late flights. Reverse idle only and Autobrake 2 on 05R and 3 on 05L/23R.

On 12/17/2018 at 1:32 PM, paulyg123 said:

I have the ground crew on speed dial.  I always toast the brakes after every landing. I have the Saitek foot pedals.  Yes, autobarkes do the trick, but nothing like stomping on them yourself.  I noticed if I only apply the brakes 1/2 way, I get the asme braking power and don't cause over heating.    Try applying them 1/2 way.

I'm kind of curious as to what it is you're doing that I'm not. Starting from around 7:23:44, I landed the Boeing 747-400 on runway 4L at JFK and managed to get off at taxiway J. This was with autobrakes 4.

Another one. Starting from 14:05:54, I landed the Boeing 747-8F on runway 31R at JFK. Autobrakes were on max as I was trying to get off at taxiway W, and at the last second, I slammed the brakes hoping to make the turn. Didn't manage to make the turn, but didn't toast them, either.

 

On 12/16/2018 at 12:26 PM, BK2 said:

It's less to none during Taxi but landings nearly 100% have this Brake heating/Tyre deflating issue. I completely agree with KLM57 saying "that for simming purposes the 747-8 is bit too real in this respect...".

Have you checked your sim's hardware settings to see if they are set up correctly and are you keeping your feet clear of the toe brakes on the rudder pedals during the landing rollout, because you should not be experiencing brake overheating and tyre deflation after a normal landing?  This is certainly not representative of the real aircraft's behaviour  with its efficient carbon brakes.

1 hour ago, Captain Kevin said:

I landed the Boeing 747-400 on runway 4L at JFK and managed to get off at taxiway J. This was with autobrakes 4.

Wow - It's no wonder the aircraft gets hot brakes and tyre deflation if they are hammered like this! 

When operating normally it is relatively rare to have to use Autobrakes 4 or Max unless there are other factors to consider, such as aircraft deficiencies which affect the landing performance, limiting runway length or contamination.  In this example taxyway J on RWY 04L is about a third of the way along this runway's length of 3680 metres and there is no way a B744 pilot would ever attempt to stop so quickly or make this turn off - unless the aircraft was on fire.  At a typical landing weight of 280.0Kgs the Flaps30 Vref speed is 152kts.  Assuming normal conditions (i.e. no tail wind, dry runway, ISA +10C & below and touchdown 500m past the threshold) the use of Autobrakes 4 will stop the aircraft in approximately 1950 metres, which is about half way along Runway 04L's length. Taxyway G or even F would be a more desireable aiming point to turn off this runway and so Autobrakes 3 would probably be more appropriate. 

5 hours ago, MarkJHarris said:

I do the same at MAN on arrivals from deep late flights. Reverse idle only and Autobrake 2 on 05R and 3 on 05L/23R.

Good idea!  Reverse Idle should always be selected as a minimum on all of the available engines.             

Edited December 20, 20187 yr by berts

1 hour ago, berts said:

Wow - It's no wonder the aircraft gets hot brakes and tyre deflation if they are hammered like this! 

What I'm saying is that didn't happen. My brake temperature was fine, as I never got the warning on the EICAS, and my tires were fine. Although I guess the link didn't work. Starting point 7:23:44.

Other link didn't work, either. Starting point 14:05:54.

 

1 hour ago, berts said:

At a typical landing weight of 280.0Kgs the Flaps30 Vref speed is 152kts.

Don't know the weight off the top of my head, but looking back at the video, it would appear as though my Flaps 30 Vref speed was 137 knots, as I have Vref + 5 being 142 knots. I'm trying to figure out what Paul did differently since in the two videos I posted, I was able to get the plane stopped without burning the brakes or blowing the tires, despite the heavy braking action.

Hi.

Already landed once or twice without having the brakes heated or tires explode... I guess I am getting the grip of this. Thank you all for contributing.

Benny K

On 12/21/2018 at 12:01 AM, Captain Kevin said:

Don't know the weight off the top of my head, but looking back at the video, it would appear as though my Flaps 30 Vref speed was 137 knots, as I have Vref + 5 being 142 knots. I'm trying to figure out what Paul did differently since in the two videos I posted, I was able to get the plane stopped without burning the brakes or blowing the tires, despite the heavy braking action.

Kevin,

Your landing weight would be around 237.0Kgs with a Flap30 VRef of 137Kts, so It is very unlikely you will see an immediate brake overheat warning at this weight even if you do hammer the brakes.  What usually happens is that the heat generated by the heavy braking action will dissipate into the wheels and tyres whilst you are taxying and then (depending on the ambient conditions and time spent taxying) you might get the embarrassing brake overheat warning - invariably just before you manage to arrive at the Gate! 

FYI, with an approach speed of 142 Kts at JFK and assuming the conditions I mentioned earlier, I estimate your Autobrake stopping distances would be in the order of :-

                     A/B 1 = 2,800m  A/B 2 =2,400m  A/B 3 = 2,120m  A/B 4 = 1,810m and Max = 1,510m

 

Edited December 23, 20187 yr by berts