Su-27's wheel brakes

[Vectury]

I do not know if it has been mentioned here before (it probably has), but I can't go through all the threads on the forum to look it up. So here it goes.

 

The single most annoying aspect of the Su-27 are the wheel brakes. If you press the brakes for longer than a second when moving, the tyres always burst. :wallbash:

This doesn't look professional at all if the pilot has to constantly tap the brakes making the '27 look like it's about to enter an hydraulics jumping plane competition.

 

So, maybe its time for a little fix? Either remove the tyre popping (ABS or something) or give us the opportunity to bind the brakes to a slider on the stick. That way I can dose the brakes. :thumbup:

[Kelevra9987]

+1

[Northstar98]

+1 this really annoys me sometimes - what I find is I have to either: taxi at slower speeds or: perform shot (<1 second) break 'bursts'

[wolfstriked]

Better tire model is needed this way you can brake hard but not lock em up.

[codefox]

This doesn't look professional at all if the pilot has to constantly tap the brakes making the '27 look like it's about to enter an hydraulics jumping plane competition.

 

It's because the Su-27 got low-pressure tires, as most Russian aircraft do due to the bad runways they got in Russia. The pilots don't have to "tap" the brakes. First, you got a drag chute, which should be used for all your landings. Second, the real plane got a brake pedal. No button as you do. So they can apply as much brake pressure as needed. You could do that too if you got rudder pedals.

[TheFurNinja]

It's because the Su-27 got low-pressure tires, as most Russian aircraft do due to the bad runways they got in Russia. The pilots don't have to "tap" the brakes. First, you got a drag chute, which should be used for all your landings. Second, the real plane got a brake pedal. No button as you do. So they can apply as much brake pressure as needed. You could do that too if you got rudder pedals.

You would imagine that it would come with an Anti-Lock Braking System to keep pilots from sliding off of runways and taxiways though. As much as you could apply pressure minutely with pedals a pilot can still misjudge the amount of pressure and that would end up with an expensive accident.

[Beagle One]

It's because the Su-27 got low-pressure tires, as most Russian aircraft do due to the bad runways they got in Russia. The pilots don't have to "tap" the brakes. First, you got a drag chute, which should be used for all your landings. Second, the real plane got a brake pedal. No button as you do. So they can apply as much brake pressure as needed. You could do that too if you got rudder pedals.

 

It's not that most runways are bad, but its that the low pressure tires can handle unprepared runways... and more important... taxiways full of mud and snow.

 

The Su-27S uses a traditional brake lever not brake pedals and no...you can't assign an axis to the brakes in DCS:W f0r the Su-27S. Because of the digital braking you can blow your tires from 40km/h to a full stop with a empty aircraft which seems quite incorrect.

[mvsgas]

It's weird, I'm not experiencing this. At what weight and what speed are you guys taxiing? I normally only carry around 5k kg of fuel and 4 to 6 missiles. If I remember the RL, translated SU-27 manual posted here, that was the normal load. IIRC, it mention weight above that needed specific tires.

 

Not sure if that relevant at all withing DCS, I seriously doubt this matters within DCS but;

SU-27SK

 

Page 17

- Maximum take off weight 33k kilograms with tire KN-42, model 017A and tire KT-156D, model 2A

- Maximum weight 28k kilograms with KN-27 tire model 016A and KT156D model 2A

- Maximum calculated take off weight of 23250kg (2 x R27 + 2x R73E, fuel 5090kg and 150 gun rounds)

- Take off weight with 2x R27 + 2X R-73E and 9229kg total 27380kg

- Maximum weight of carried missiles R-27 and R-73E- 1950kg

Also, page 18

- Maximum landing weight 23k kg

- Maximum landing weight of 21k kg with 3560kg of fuel and no missiles. With missiles, 2x R-27 +2xR-73E, fuel weight of 2840kg.

Hope I translated it good enough, there are some other things but I'm having trouble translating them.

Edited November 29, 2015 by mvsgas

[mvsgas]

You would imagine that it would come with an Anti-Lock Braking System to keep pilots from sliding off of runways and taxiways though. As much as you could apply pressure minutely with pedals a pilot can still misjudge the amount of pressure and that would end up with an expensive accident.

 

I have no idea how it works on the SU-27 ( any versions) but on the F-16, for example, anti skid works only above certain speed and turns off below a specific speed. Same with the F-117. I wonder if the RL SU-27 have similar system?

[cardboard_man]

It feels really inconsistent. Some times while trying to be as careful about it as possible e.g 20kph to a stop i will blow a tire. Other times while messing around ill go full brake from 100kph to a stop and be fine. the only thing that is consistent is if i use a full fuel load i will burst a tire when turning onto the runway at i don't know maybe 10 kph with no braking.

[Bourrinopathe]

I think it's been mentioned somewhere in another thread that the current behavior is not what it should be, and that the devs are going to modify it for a more realistic resistance.

 

Try the search function. It can't be buried that deep.

[mvsgas]

I think it's been mentioned somewhere in another thread that the current behavior is not what it should be, and that the devs are going to modify it for a more realistic resistance.

 

Try the search function. It can't be buried that deep.

 

http://forums.eagle.ru/showthread.php?t=149399

[Vectury]

I think it's been mentioned somewhere in another thread that the current behavior is not what it should be, and that the devs are going to modify it for a more realistic resistance.

 

Try the search function. It can't be buried that deep.

 

 

http://forums.eagle.ru/showthread.php?t=149399

 

Thanks! Apparently it has been reported. I hope they fix it.

[ShuRugal]

You could do that too if you got rudder pedals.

 

Shame the Su-27 doesn't have a binding for brake axis...

[vegue]

I learned to taxi with <75% RPM to keep the speed low. And I still tap the brake key to slow down this big bird, especially before turning. In this way my tires rarely burst. All missions in the campaign require takeoff from ramp. It's boring to spend so much time to start the engines and taxi.

[Tone71]

Shame the Su-27 doesn't have a binding for brake axis...

 

This, more than anything else. Never had a problem with tyres bursting but would really like to assign brakes to toe brake axis on rudder pedals.

[codefox]

I'm sorry, I was mistaken. Actually the real plane does not have a brake axis.

[ShuRugal]

I'm sorry, I was mistaken. Actually the real plane does not have a brake axis.

 

it does not have toe-brakes the way a Western plane does. Most russian aircraft (Flanker included) have a lever on the control stick to operate the brakes.

[grunf]

Regardless of whether the real Su-27 has toe brakes, stick lever or something else, it has the ability to dose the braking force.

Since the DCS Su-27 has PFM, it should have a brake axis, not an on/off button.

[Vitormouraa]

The Su-27 tires are limited about pression inside of the tire, as mvsgas said. The pression on brakes need to be carefully pressed. When you're braking with buttons, that's a little bit difficult, but when you have pedals, you won't have problems, I hope.

 

The Su-27 has parachute to brake at high speeds, so DO NOT use the wheel brakes in high speeds.

[karambiatos]

The Su-27 tires are limited about pression inside of the tire, as mvsgas said. The pression on brakes need to be carefully pressed. When you're braking with buttons, that's a little bit difficult, but when you have pedals, you won't have problems, I hope.

 

The Su-27 has parachute to brake at high speeds, so DO NOT use the wheel brakes in high speeds.

The issue is that the tyres break at slow speed not at fast speed.

 

Holding the break button at 40km/h will result in a poped tyre.

[ShuRugal]

The Su-27 has parachute to brake at high speeds, so DO NOT use the wheel brakes in high speeds.

 

 

I find that braking by keeping the nose up around 12 degrees is also a very good way to slow the plane to wheelbrake speed.