Hello, yes please feel free to use the audio from this video! Thank you for asking

@@Daisytbear thank you!

V2 Green Arrow also had the same awful squeaky whistle !

that's a nice comfy looking armchair you have there.

@@Paraffinmeister hey thanks 👍

Władca Wymiaru no. The boiler was overfilled and water carried over into the regulator valve meaning it was impossible to close the regulator. The driver did the right thing in fully opening the regulator to get the water out of the valve and then closing the regulator. I imagine with it been a wet day the sand in the sanders would of got damp so the 2 that ran onto the track were to hand sand the rails. No life's were at risk here as the boilers are stress tested for everything and wouldn't vibrate as they are VERY securely bolted down!

Can we see your grade card please?

Alistair Foden who's?

?

@@jackcarter5101 what's there to be confused about

A lot - how do you know? Which loco is it?

@@jackcarter5101 it says it in the title dumy

@@shaneisaperson3161 The title says Duchess of Hamilton, but you said it's NOT Duchess of Hamilton!

Tell that to the engine her self as she’s hurting her own wheels, rods, and pistons. But not only them, the rails were suffering in hellish agony too.

@Captain Dildoface it had such bad wheelslip it almost started melting the wheels and blew the linkage all to hell. There's footage on youtube

Simon Swain I love this comment

Terrible idea

Too much spare time, huh?

: | It’s not that deep

Ok 20 coaches as you say , but on what route ?

@@LuckyTrucker1 yeah it was a test run between crew and Glasgow by duchess of abercorn it still holds the British record to day

Pay them no mind, Americans don't know much about steam engines and don't seem to want to anymore.

++@@AEKarnes++ But they do claim to have the biggest, loudest, most powerful steam locomotive ever made and have recently restored it to some sort of working order apparently.

@@JohnSmith-pd1fz Americans think size is everything. The boiler on that monster isn't even designed to fire properly.

++@@AEKarnes++ Well I had my reservations when i first heard about it. I wonder if it was intended to be wood fired, rather than coal.

@@AEKarnes isn’t designed to fire properly? Who told you that? In terms of pulling power, the big boy was one of the most successful, but it’s not the most. I curious as to why you say Americans don’t care to learn about steam locomotives anymore, most problems these days is the new generation of steam railroaders want to learn, but most all of the old heads aren’t willing to teach

Or perhaps just a better regulator design that isn't prone to jamming itself wide open when wheelslip occurs. Note you never see a US steamer do this when the wheels slip, engy closes the regulator and it stops feeding steam to the cylinders. On many british steamers the regulator won't close when there's a large flow of steam around it, thus we see what's effectively a runaway engine. The only times American steamers came close to doing this was on the mallets, where one set of drivers would remain firmly adhered to the rails while the other slipped. Often this would go unnoticed by the engineer because the length of such locomotives and the massive diameter of their boilers meant it was difficult to see the forward drivers and the sound of the in-traction engine would obscure the sound of the slipping one. PRR had problems with severe damage to running gear on their 4-4-4-4 steamers because of this, often because it would happen while the locomotive was already ripping along at 70-80MPH. Even here, though, if the engineer caught it and closed the regulator the wheels calmed right back down again.

On the surface that sounds like a good idea. But you need to remember steam is not like compressed air. Because the water is the boiler is already well above it's normal boiling point and the only thing keeping it from turning into steam is the pressure in the boiler. So as you remove steam (pressure) from the boiler the water in the boiler instantly turns to steam maintaining the pressure. So if you were to dump large amounts of steam/pressure you'd also be losing a lot of water potentially uncovering the crown sheet with deadly results. As the engine began to slip the regulator jammed from the steam flow. The crew did a good job with the options they had. You can see they opened the cylinder drain cocks at 1:57 to lower the pressure locally at the cylinders.

Roger King they have one, the drain taps. When the slip gets out of control, the taps are opened but the only thing that stopped this one was a brake application. As for the regulator, with such a low dome needed to fit under the British loading gauge, water carry over is inevitable on a loco this size, even with a smoke box regulator a la Blue Peter.

renegadeoflife87 the problem is one of loading gauge. Remember that the steam railway 1st appeared in the UK and no one knew how big the trains should be. So Europe learned from our mistake and made their loading gauge bigger. Then came the US, Africa, India and Australia. Russia and China were the last countries to see railways so their loading gauge is MASSIVE!!! The UK gauge means that large locos such as this need a flat dome so the height of the regulator valve above the water level in the boiler is restricted, leading to water carry-over during bouts of slipping.

Perhaps the driver had just come from his sports car where he drops "wheelies" getting away from each traffic light?

smitajky they were luck that the duchess didn't go full on BLUE PETER when that happened

Doubtless it would have, had the driver not got the drain cocks open in time.

The brakes weren't fully released and the regulator is very difficult to close when there is a rush of steam like that. It has to be wound back into mid-gear and even then it takes steam and still runs so it has to be opened wide and slammed shut. One of the support crew dealt with it on that occasion, I was there at the time. We had several similar incidents with that engine. I remember one time at Kirkby Stephen when we got a signal check during a record run but we were moving and the rail didn't get damaged like it did at Dent. Fortunately the motion on those engines is very tough and don't bend however fast they go, unlike some other classes. The princesses used to occasionally bend their rods but the duchesses had rods made of Vibrac which is a Chrome/Moly steel alloy. Some of the rebuilt Scots had Vibrac rods e.g. 46100 has them but 46115 doesn't. There was an incident at Watford once when a Duchess ran for over 15 minutes and wore through the head of the rail.

Driver didn't really do anything wrong...

You poor thing!!

+Wasatch Range Railway Tell that to the poor driver on Blue Peter. The screw reverse broke his wrist when he tried that, or so I've heard.

good gravy!-----really?

So the story goes, anyway. I wasn't there, being 8 years old and on the wrong side of the Atlantic at the time :P But from what I've read about the accident, the reversing screw spun out of control when the driver unlocked it to center the valve gear and broke his arm or wrist.

that's what I hear.

Wasatch Range Railway both arms IIRC. Open the drain taps and, if that does not work, apply the brakes to check the spin but risk bent rods.