Thread: What Happens When You Slam On the Brakes in a 747?

try and keep up Vlad,,,

Originally Posted by stig0000

200m, from 200mph,, crazy,,, dose anyone no if planes have some sort of ABS????

Those markers are 1,000's of feet not 100m. Its still bloody impressive though, I wonder if your bum biting the seat makes a difference

Yes they have an anti lock brake system.
They guys above who drive them have pretty well covered it.

Not all aircraft have ABS.
I wish that the Twotters and B1900D I was looking after in a West African country had, as we were constantly changing wheels due flat spots or worn completely through.
I have on a couple of occasions seen the wheel on a Twin Otter nearly ground down to the axle. That was due to poor pilot training as they used to land with size 10 on top of the pedals.
I have a good selection of photos of various problems I encountered there.
Ironical it may seem is that I am writing this from an old iron ore mine in the south of the same country I declared I will not work in again. This time it is looking after an Australian aircraft here on a job and I am out in a couple of days and I cannot wait.

Fascinating stuff chaps! Sounds like you need a license and 6 weeks study just to learn how to use the brakes, there are so many options/ possibilities.
In my 1946 AusterJ1 we don't have brakes- we have "influencers" that slightly retard motion and influence direction. And you work them with your heels...
But then, we've only got 2000 lbs Max to stop.... from about 50kph.
First post on here- pleased to see some other pilots about. And, of course, I operate another British device designed to spread oil around the countryside- a Series III Landrover. (The Auster is powered by a Gypsy Major, so it spreads more oil in a fine spray over a much larger area).
And then, if we want comfort- of a sort- we have out Morris 1100 which contributes its own portion of oil to our carbon footprints.
If it's British and leaks oil, we own it...
Regards

Coop

That was due to poor pilot training as they used to land with size 10 on top of the pedals.

Bloody hell. Not good at all.
I once had a student put the handbrake on in flight that I didn't see, made all the worse when we touched down he heard the screech and locked his toes on the brakes. I got my left hand under his knees, pulled them up and disengaged the handbrake in enough time not to leave a flatspot on the tyres...

Surely the minute you hit the ground with wheels not able to spin the tyres would flat-spot ?

Originally Posted by VladTepes

Surely the minute you hit the ground with wheels not able to spin the tyres would flat-spot ?

Yes you would get a flat spot, the really talented drivers could blow all tyres, the merely inept would just flat spot them. Sometimes the tyres would still be within limits after this abuse, but not usually.

We had a case of a Caribou taking off with the hand brake ON in East Timor, the reason he didnt notice it was on was because it was a dirt strip (strip being a very loose description, paddock would be closer) very muddy, the aircraft was sinking, and it took full power and full flap to get going. He found the handbrake on during the pre landing check list. Looking at the high water/mud line and he had mud to the top of the tail which is 38 ft high, I reckon he cleared the prop tips by about 10 cm.
Now dont get me started on the female pilot who managed to blow all 4 main tyres twice in 1 week, she obviously had issues with the prelanding check list.
For some reason my kind offer for her to help out in wheel bay fixing her handy work fell on deaf ears.

Originally Posted by C00P

In my 1946 AusterJ1 we don't have brakes- we have "influencers" that slightly retard motion and influence direction. And you work them with your heels...


Coop

HA love it
but i know what you mean. DH89 throtels on the left, differential brake on the right, feet on the peddles, taxing you always felt you were short 1 arm and a hand. not that they had that much of an influence any way. a wee bit of swing on take off. nope try again. and again and again.
tiger moths, people think these must be easy to fly, nope top heavy and wobble yet so easy to do a woffle fobber.