German heavy freight---mit drei dampflokomotive !!

[delaplume]

I've posted this purely for the sheer impact of the start sequence-------Yes, I know, it's not "Model Engineering" etc---etc, but at Full Screen and Full Volume it's a great demonstration of 3 crews at the top of their game........enjoy !!---------->



youtu.be/ogRGlNpjSLc

[hunslet]

Sehr beeindruckend und spannend zugleich, toller Film

[ettingtonliam]

I didn't realise until fairly late on the film that there was a banker on as well! Where and when was that filmed? The locos all seem to be in good condition, nice exhaust beats, no bangs or clonks from the motion, but don't let the anti carbon emissions crowd see that film, or they'll be over there gluing themselves to the tracks! Coal fired I think? What was the constant plume of steam emerging just in front of the chimney of each loco?

Then I watched the film of the military convoy train which followed straight on from that one!

I should have walked down to get the milk and a paper half an hour ago, but now I'm late!

[stevep]

Keith Wilson once wrote that when he visited a friend's track (I think it was called the "Garden & Woodland Railway", and owned by a friend and customer) and they double-headed with similar engines, the two engines would start off out of synch, and then slowly synchronise.

The two engines at the front demonstrate this very well, as they synch up just before they move off the screen in the first shot.

[delaplume]

Apr 19, 2019 8:28:52 GMT stevep said:

Keith Wilson once wrote that when he visited a friend's track (I think it was called the "Garden & Woodland Railway", and owned by a friend and customer) and they double-headed with similar engines, the two engines would start off out of synch, and then slowly synchronise.

The two engines at the front demonstrate this very well, as they synch up just before they move off the screen in the first shot.

That'll be the late Ted Martin's "layout" in 7.25" gauge................have a look at this}------>  youtu.be/Ya42ODoiWDg

[ettingtonliam]

Apr 19, 2019 8:28:52 GMT stevep said:

Keith Wilson once wrote that when he visited a friend's track (I think it was called the "Garden & Woodland Railway", and owned by a friend and customer) and they double-headed with similar engines, the two engines would start off out of synch, and then slowly synchronise.

The two engines at the front demonstrate this very well, as they synch up just before they move off the screen in the first shot.

I read somewhere that Garratts would synchronise between the front and rear units, but when I checked up in Durrant's 'Garratt Locomotives of the World' he goes to some length to debunk this as a myth. (---utter nonsense--)
His explanation is that older Garratts with tortuous steam passages and inadequate short lap valves (this seems to describe the UK mainline Garratts nicely) the exhaust beats from the rear unit are muffled and become lost in the long exhaust pipe, so only the front exhaust can be heard. Apparently modern (thats 'modern' when he was writing in 1969) Garratts of the SAR GMAM and NSW AD60 classes the exhaust beat from the front and rear units comes through loud and clear and can be heard wandering in and out of synchronisation continually.
He then goes on to a calculation, based on a difference of 1/4" in wheel diameter beween the front and rear units (apparently SAR practice allowed a maximum of 1/32" between any 2 wheels in any one unit, but up to 1" difference between the average wheel diameters of the 2 separate units) that on a loco with 4' 6" wheels it will go from fully in phase to fully out of phase in 380', and then back to fully in phase again in a further 380' and so on.