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Cooee BW,
Not good that you copped the plague, but at least you were boosted hence not suffering seriously.
Yes, the plague is going berserk everywhere.
I wonder what will happen here in four months time when we begin to shiver.
Our plague is now the worst that it has ever been, and we are in summer time.
So, I am still hiding from the plague here as best as possible.
I got boosted just afore Santa time, and would guess that we will require a fourth jab prior to shivering time.
Bathurst council put on some pops and bangs at 2100 on New Years Eve at the showground.
But, I did not attend, I could hear it from home, and watched the smog hollow pops and bangs on tv.
AH, you got the class 37 ops manual.
You might do some research reading for me while you are recovering from the plague.
Firstly, does it mention either a supercharger or turbo ? (I am guessing a turbo).
That will answer one question regarding yer black exhaust belching video clip.
Secondly, what Governor is mentioned; GE, Woodward, Other ?
The Throttle (Master Controller), is that Notched, OR, Sweep style ?
The Van Demonian EEs had either depending on the class.
The Y class had a notched throttle, while the Z, ZA, ZC, ZB had the sweep type.
Notching up and down with the sweep type is a tad more awkward determining the desired traction amps.
And, is much easier to cause a greater donk revs alteration if not careful.
Prior to my deportation, the only weasel that I played with having the sweep throttle were the 73 class.
They are diesel hydraulic with Cat donks.
Your EE anti-slip brake is a nightmare.
That naturally applies the loco brakes when wheel slip is detected and CANNOT be removed.
So, you are suddenly not only fighting the steep gradient, but also the loco brakes slammed on.
When that slams on, it can also cause an increase in donk revs resulting from the traction amps demand altering.
With Westinghouse brakes, IF the wheel slip becomes severe, you can slightly whip on and off the independent.
You still have control of how much independent is used and for how long.
Though, in the video clip I did not squiz the tell tale sign of sand puffing out onto the rails to indicate wheel slip.
Mind you, the video clip resolution grabbed is not very good, so details are slightly unclear.
As to yer BR class 55 Deltics, they had a pair of Napier donks which were Two Strokers from memory.
Not only the problem of governor sync for dual donk revs and generator output, but also the "rubber band" effect.
With our EMD things here for shunting, you had to wait for the rubber band to wind up before they would move.
VERY tardy to respond for low notch shunting they was compared to our glorious Aussie Alcos.
Put an Aussie Alco in gear, take a notch and release the independent and it is OFF and running.
So, YES, I would imagine that controlling a Deltic for low speed shunting would be awkward.
We would load up the EMD amps necessary with the independent brake applied.
Then once sufficient amps were being produced, gradually release the independent, but not all the way off.
Controlling the loco speed with the independent brake.
Notching up and down on an EMD to control loco speed was not a good result.
Shunting night time Mail cattle trains here was a required skill to prevent snotting it too hard.
Plus, hooking up the Silver Streak car carrier wagon to the front in smog hollow yard.
Our 86 class buzzboxes would suddenly amp right up in demand when train speed was about to stop.
When powering to a stop due to a rising gradient.
Shutting off would result in a thump and coupler slack run-in action, (cop that in the dining car).
So, with the train brakes applied to stop, you then gradually applied the independent.
With both brakes applied, you then shut off power.
There would be a huge BANG when the high speed circuit breaker tripped.
But, there was no resulting thump to the train.
Eventually, it was made ILLEGAL to shunt a cattle train with any cattle on board.
That also applies to our emu and dmu sets being amalgamating, kick out the cattle first, then shunt.
Can't have the claret pouring out of the cattle snozes.
AH, I do miss them good ole days.
Steve.
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