Juniatha what would be the right cylinders on the NYC Niagaras with 290 lb boiler pressure and 79 inch drivers. Gary
Then there's the legend of Drake's Drum. If England's threatened with invasion beat the drum preserved at Buckland Abbey, Drake's home, and he'll come back with his fleet to fight 'em off.
There's the tale that Prime Minister Winston Churchill had a Royal Marine drummer stationed at Buckland Abbey during the summer of 1940 when the German invasion seemed imminant to sound "Beat to Quarters" on Drake's Drum, just in case!
Juniatha Flintlock - a bit of everything? I believe it could be made an example of what people can take up and endure if only they be made to believe a huge treasury can be sacked in if they succeed. And then this picture of Drake on board of his ship with a few comrades comes to my mind, when he saw the huge Armada. He looked them over through his telescope, cooly analysed their weak spot: They don't know how to sail! They are much to close to each other. So he cold bloodedly made one bold decission: to sail right there and set them all aflame! In the end the whole enormous Armada went up in one hell's fire and but the few ships of Drake's and his companions were left. So he returned to report to his queen ..: "Job done!" add.: Oh, and Flintlock, you wrote "Could explain a lot of history when you think about it." Maybe: Could explain a lot of history when you drink about it. = J =
Flintlock - a bit of everything?
I believe it could be made an example of what people can take up and endure if only they be made to believe a huge treasury can be sacked in if they succeed.
And then this picture of Drake on board of his ship with a few comrades comes to my mind, when he saw the huge Armada. He looked them over through his telescope, cooly analysed their weak spot: They don't know how to sail! They are much to close to each other. So he cold bloodedly made one bold decission: to sail right there and set them all aflame! In the end the whole enormous Armada went up in one hell's fire and but the few ships of Drake's and his companions were left. So he returned to report to his queen ..:
"Job done!"
add.:
Oh, and Flintlock, you wrote
"Could explain a lot of history when you think about it."
Maybe: Could explain a lot of history when you drink about it.
= J =
The more common legend about Drake and the Armada is, from Wikipedia:
The most famous (but probably apocryphal) anecdote about Drake relates that, prior to the battle, he was playing a game of bowls on Plymouth Hoe. On being warned of the approach of the Spanish fleet, Drake is said to have remarked that there was plenty of time to finish the game and still beat the Spaniards, perhaps because he was waiting for high tide. There is no known eyewitness account of this incident and the earliest retelling of it was printed 37 years later. Adverse winds and currents caused some delay in the launching of the English fleet as the Spanish drew nearer, perhaps prompting a popular myth of Drake's cavalier attitude to the Spanish threat. It might also have been later ascribed to the stoic attribute of British culture.
I'm sure I've seen a painting of that scene and a plaque from 1883 illustrates it.
While there have been many Royal Navy ships named for Drake other names were more prominent, particularly after the first world war.
Peter
JuniathaOk - accepted.
And the Brits dream of getting back to the times of Sir Francis Drake - however they don't dream of getting back to the days of Robin Riddles and Roland C. Bond (not to be confused with James) and E.S. Cox (Juniatha)
At least some Brits dream of that period...
https://www.theclanproject.org/Clan_Home.php
There is a long running British Soap Opera Heartbeat set in that period.
Overmod:
Ok - accepted.
SD70DudeAll that warm beer probably helped too.
Well, the alcoholic beverages back then, beer, wine, you name it, were supposedly much more potent than they are today.
Could explain a lot of history when you think about it.
Flintlock76 We toured the replica of Drake's "Golden Hind" about 20 years ago. I couldn't imagine sailing it on a lake, much less around the world. Either those 16th Century mariners were incredibly brave or they were out of their minds!
We toured the replica of Drake's "Golden Hind" about 20 years ago. I couldn't imagine sailing it on a lake, much less around the world.
Either those 16th Century mariners were incredibly brave or they were out of their minds!
All that warm beer probably helped too.
As for modern railroad arguments, GE vs EMD and is PSR Good or Evil can get pretty heated!
Greetings from Alberta
-an Articulate Malcontent
JuniathaAnd the Brits dream of getting back to the times of Sir Francis Drake
I don't know, the way World War Two re-enacting's taken hold in Britain, to say nothing of all the Spitfire restorations I suspect now they prefer the era of Sir Winston Churchill!
At least the 1940's had electric lights and indoor plumbing!
Juniathaplease note that I had reason for it
To the extent there was any, it has been relieved from the present discussion. Or any prospective further ones of similar nature.
Quote: "While I'm in no position to argue the merits of any of the participants in the discussion of various and sundry engineering issues"
See, this just exactly what I apprehended the risk will be: that regular members get uncertain about the matter at hand and don't know whom to believe - and that sends like 50% of my efforts straight up the chimney!
Quote: "the intensity of some of the participants convinces me of the merits of remaining a diesel (and straight electric) enthusiast."
Well - not too difficult to sort out me as the one having come on intense. However, please note that I had reason for it - see above! And before posting I had sorted out about 90, well 85 .. ok, 83 % of intense 'radiation heat'.
Direct electrics - uuh! There have been some very intense fi... - uhm - discussions about proper system to choose and adopt - about the everlasting project of how European railways could -if ever- understand each other to unify their systems into one and the same all over Europe. Main focus now are the super speed trains and their technical concepts - each one advertising their own.
And the Brits dream of getting back to the times of Sir Francis Drake - however they don't dream of getting back to the days of Robin Riddles and Roland C. Bond (not to be confused with James) and E.S. Cox - nor to the days of Jaguar when the saying was: 'they are good cars, but you got to have two of them: one for driving and one to repair' .
- edited once -
Man, you want intensity? Get trapped in a room with some Civil War or World War Two buffs! Ay-yi-yi!!!
Makes steam freak intensity look positively mild!
While I'm in no position to argue the merits of any of the participants in the discussion of various and sundry engineering issues, the discussion is quite informative to me but the intensity of some of the participants convinces me of the merits of remaining a diesel (and straight electric) enthusiast.
Well.
Gents I'll say this much, if DiplIng Juniatha says it, you can take it to the bank!
I don't know much about engineering (They wanted to call us "engineers" in the copier repair trade. I wasn't no engineer, I was a copier repairman, and proud of it!) but I DO know that to be a "Diplom Ingenieur" in Germany you've got to be "A-Number-One" smart as a whip! When I met David Stephenson* at a train show and we discussed Juniatha, out mutual aquaintence, we both agreed.
Not trying to start a fight with Brother Overmod, who I enjoy as a friend (I hope so! I love you all!) but I wouldn't mess with someone who's got a VERY ominous-looking B-52 in her arsenal.
That picture's scary!
* "Pennsy's T1 Reassessed." Classic Trains special issue "Steam Glory 3," from 2013. Kept it! No way was that issue going into the recycle bin!
Dear Professor (hon?) Overmod!
I must say, this is an especially boastful sassy effrontery! I must put this straight: there is little if any real arguement in all the many lines you shoved up to burry me under. So I regard this as a personal insult, an attempt to crush each and everything I have written - and have written orderly in full knowledge of the physical laws that play a part in these things I have described.
However I sense you felt obliged to jump to 'rescue' age-old so understood male tech talk superiority over so-misunderstood menace of today's feminist's attempts to intrude each and every remaining male resorts. How wrong you are - me, I'm in no way intending to intrude anywheres, I'm just interested in steam locomotives just as anybody else in this forum may be or may not. Only, due to my being a Diplom Ingenieur still with a classic study of Maschinenbau I can sort out some things that often get entangled in conversations - nobody needs to feel like I stepped on his toes. Cool down Over(sic!)mod! The world will be there tomorrow!
As things are, I can only recommend to all readers to ignore this lengthy, winding and at points illogical and conflicting reply and spare yourself to get confused.
Now, in order no one can say I make it too easy for myself, I will at least reply on some of the 'points' brought up against me within each the shreds of my text:
1. shred:
Quote: "This is not necessarily complete tripe; it is possible that, using the 'reservoir' of supercritical water and excess available superheat at high draft level, there would be 'enough steam' to produce the necessary acceleration. Not particularly cost-effectively, and with no guarantee that the locomotive would hold speed (or continue acceleration) beyond a few seconds or minutes, but the higher cyclic does translate into greater cylinder horsepower up to the point that the valves and gear cannot"
Yes, this *is* complete tripe! And the accusation right with it. What is a 'reservoir of supercritical water' in a conventional steam locomotive? do you know at all what the supercritical stadium of water implies? It is by faaaaaaaaar out of reach of a classic steam loco! Absolute rubbish, just meant to dazzle and deceive an unexpecting person.
'excess available superheat' - where is that and how does it come together? There is non - just baloney!
'there would be 'enough steam' to produce the neccessary acceleration. We learn here physics turned upside-down: in order to produce more ihp you just speed up the acceleration - that no-one has ever come about that! It's so simple! Sports car manufacturers rack their brains about super-powerful engines when all you need is to produce -first- the demanded acceleration - and -second- power output of the engine will follow accordingly! Gee - that's cute, I love it.
(My goodness - this is *not* about the amount of steam but about cylinder performance: *this* cannot produce *higher* t. e. at *higher* speeds even on the same c/o!)
Now, if you suggest to pull out c/o open (lengthen intake) at *increasing* speed you turn upside-down known sound locomotive handling. Of course this would go with a large increase of steam demand and the whole thing in fact means a sluggish (easy) loco working at slower speeds offset by an increasingly harder working as speed increases to the degree of even handling c/o in the *opposite* way of normal, and leaving much non-used t. e. and acceleration in the slower speed range. Now, who would drive a locomotive in this absurd way?
"no guarantee that the locomotive would hold speed (or continue acceleration) beyond a few seconds or minutes, but the higher cyclic does translate into greater cylinder horsepower " A few seconds ... gee! The 'higher cyclic' translates into greater cylinder horsepower: Again, it does not help to have *any* amount of steam - cyclic or not - if valve gear cannot pass it through cylinders. In regular driving the higher the speed the more throttling occurs in the steam passages and therefore less t. e. - excess steam will be blown off by safety valves in the good old way - wether this extra steam comes in cyles or continuously.
"Do I really think that acceleration all the way from "80 to 100" would be faster than "60 to 80"? Not really..." Now, what's that? First you claim it is possible - then you don't believe - yes: - yourself? Then, why should anybody else? This note goes around full circle.
2. shred:
"the old story about the Super Hudson design providing too much 'thrust or kick' and bending rods would be far more applicable to the Niagara. It might be interesting to run comparative numbers for the Niagaras at original vs. stepped-down pressure to assess what the 'right' cylinder dimensions for 265psi would have been."
Completely mislead beause the two classes were two seperate designs. The quoted would only have been correct if both would have been equipped with one unified set of rods! That was not the case, and thus which one was underdimensioned cannot be established by 'running comparative numbers for the Niagaras at original vs stepped down pressure' . How should that show correct cylinder dimensioning??? In regular locomotive construction question would rather be to correct rod dimensioning for 'what the 'right' cylinder dimension for 265 psi would have been' All in all this is completely off the topic. I never dealt with a 265 psi b. p. setting of the Niagara - it was never a question. If Prof Overmod thinks since some J-3a had been reduced, the Niagara should as well have been reduced the same way, this is his personal believe - there is no point against anything *I* said in this. How and why can the propper cylinder dimensioning only be determined at 265 psi? It's very simple mathematics to establish what cylinder volume for 275 or 290 psi or for 265 psi for each a desired t.e.
3. shred:
"But the issues with Niagaras did not involve "greater peak horsepower" -- the water-rate considerations even on a railroad with frequent track pans would have become significant "
There I wrote that the extra power output would have been produced just by a lower specific steam consumption and *no* more steam (btw: i e *less* steam on any lower than maximum ihp!) - and still here are water-rate considerations put up against what I wrote! And where did I write that 'issues with the Niagaras did involve "greater peak horspower"? To criticize a text it is of advantage to read it first - and understand that this was *my own* comment as to Kiefer's choice of cylinder volume for 275 psi (too small for best thermodynamic efficiency in my view)
"if you look at the assumptions behind the detail design of the NYC 5550 (and inherently in the April '45 spec for the C1a) you will see this very clearly. " NYC 5550? chee-chee-chee! Congratulations if you have information about the never-to-be C1 class - but what has that design ever to do with *my* contemplations about the Niagara? What will I see clearly?
"Reading between the lines, I suspect there were the same kinds of failure that N&W was seeing with the extended #4 driver-pair pins " Now it gets ever wilder: now the design of coupling rods interfere with steaming of boiler and with cylinder dimensions - O-M-G!
"#4 driver-pair pins on the original lightweight J rods; the Niagara design was somewhat more susceptible to priming " Now that's the peak: coupling rods design and priming in the boiler - another connection so far ignored by even the most notable steam specialists!?
4. shred
"found a point of failure that came up 'quicker' than valve-gear problems: insufficient valve lubrication (or dimensional clearances) .. and insufficient valve lubrication is not a valve gear problem? What is it then?
"as Ed King memorably put it, that was not a factor in the infamous test failure on PRR either by the noted results or later discussion of the testing by Cover et al. as preserved at the Hagley." Once again: "infamous test failure on PRR either by the noted results or later discussion" Failure by results or by later discussion! Great - I say nothing further! General: now, here you are! If that does't impress the last ignorat bloke! I'm only born in 1976 and by that must bow to the superior mass of historical name dropping here - may I know of physical technology whatever I may. Namedropping used at precisely the right moment has silenced many people - but what is the precisely right moment in a writing? Btw - what is it to tell us? Sorry, I'm always so unimpressed and down to earth.
5. shred
My writing: "Mind that with a 20% over-revving, forces reach 144% of the design maximum". and Overmod: "Especially if Chapelon was correct in his assessment of 'routine' lateral bending in the Timken narrow-section lightweight rods." Plain NO here! The increase I mentioned comes from increase of rpm only - no mechanical bending involved! Full stop!
"over-revved continuously, rather than (as was clear to me) repeatedly high-speed slipped without proper notice -- as in the case of the "130mph and higher" operation"
What is the dfference between the two? revving is revving - no matter if it produces speed over rails or slip over rails - especially when slipppage is "without proper notice" (i e goes on over longer than a moment's time). It's the centrifugal forces that matter here!
"The combination of inertial and shock forces on lightweight rods in high-speed slipping is, if anything, far higher in the deleterious senses than steady-state high speed would be, and probably makes your point even more compelling." Deleterious - hu-hu-hu! No, absolutely not! Again: inertia is *only* dependant of the level of rpm. What shock forces are there in slipping other than in regular high revving? *Far* higher? Seems, if the high speed slippage comes into proper frequency of the drive axle(s) there could be torsion forces and momentary lack of straight 'in line' running of wheels and an increase of over / under speed every 1/4 of revolution. Creepy, somehow, isn't it! That's why designers usually took more notice of that than of other forms of slipping
6. shred
"You're leaving out the enormous amount of maintenance that was used by railroads like the Pennsylvania or NYC to keep a jointed-rail mainline in proper shape. " No, I do not. First, such maintenance as would be needed to keep a jointed and nailed rails track without the typical low spots and bends certainly did not exist - I can say that because the American railroads were economic enterprises and such a sort of maintenance would have simply exploded their maintenance budget, it would have demanded revamping embankment under the joints in comparatively short intervals and straightening / replacing bent rails, really an enormous effort - for sure not in the economic interests of railroads making the bulk of income by freight trains. Further, I saw the real riding over the assumed best of these tracks in the advertising film: bounce-bounce-sway-bounce! Last not least logic (wow this is hard from a woman, I know!) must tell you that with this sloppy sort of track system (nailed rails with always some 15 - 25 % of these nails more or less pulled up) you can *never* compete with modern continuously welded track with sprung double screws on rails into much sturdier sleepers and embankment of defined and clean granite broken stone ballast with alongsides superelevated shoulders to keep the track where it was laid and precision adjusted - the result being a passenger in an ICE or TGV feels smooth like in an airplane in perfectly calm flying weather - no bouncing at all and that not at 120 mph but at 175 mph! Note: you may have a superior knowledge of old times - but don't even try to compete with me in today's technology!
"There are a number of reports -- whether anecdotal or 'doctored' I can't say," Well exactly that is the point - this way 'doctored' i e manipulated reports get involved and when that's the case I quit because then there is no way of sorting out what was true and what was not.
" one of these stories claims the ride on a T1 was considerably better than in 'the business cars behind'"
That would be a unique and really singular turning upside-down of what is normally found everywhere in the world! And oposite of what I saw in that video: the riding of the - fairly new! - T1 was certainly worse than that of the lounge car also filmed at about the same speed; it was rough to say no more: the engineer at one time was even lifted from his chair for a moment in a rebouncing action of the engine and the view along the boiler showed nosing and twisting more than on a run-down 012 Pacific: as much play they had developed in bearings, most all of them always ran dead straight ahead - to a part again result of really good track maintenance on federal DB back then (it is not the same today, off the ultra-high speed lines). In the coach compartment I could stand a 5 DM coin on the table on its edge in direction of travelling and it wouldn't fall for minutes on end before I finally lost patience and took it back again. I had done that when joining my father back then on a trip to Frankfurt - that was the quality of riding in an Intercity train with a 103 class twelve wheel electric at 200 km/h.
7. shred
" In any case my personal, and essentially unjustified, opinion is that PRR made a great more out of high speed running than their actual plant ever really permitted except in a few, fundamentally virtually unimportant, sections. Some of the discussions of doubleheaded K4s up against their practical speed limit (of about 92mph) mention the most alarming loss of compliance or guiding integrity on curves "
Oooops??? Now, there you are - and after a whole chapter of claiming the 'jointed and nailed rails track' to have been as good as .. oh, come on!
Btw - I saw an old super-8 film by a friend travelling the cab of a DR (DDR) two cylinder 03 Pacific (Berlin-) Buechen - Hamburg in 1970 when the driver had - as they then often did 'let her go' and see 'what she could do' on that stretch of well maintained DB track: in fact 145 km/h or 90 mph the guy had stopped them, with 12 coaches, some 500 t metric. Shortly before reaching Hamburg they ran straight line through a small station over high speed switches and then into a wide left superelevated curve. On the switches the engine joggled somewhat then fell back into her unimpaired straight forward running and entered the curve smoothly, maintaining her unimpeded running - no nosing whatsoever. Side remark: what all these engines had was a motion I called 'gallopping' due to the comparatively large mass of reciprocating parts with about just ~ 12% overbalancing, you could see that by the window cut-out vibrating in rpm mode when filming the driver sitting still. (added paragraph Jan 16th)
8. shred
"This is not a major factor for the PRR T1, at any rate, which used an OC gear with lower travel at shorter cutoff, and valves with comparatively low inertia."
My goodness, the other way around! there is much less inertia force in continuously rotating cams than in oscillating cams. This is so self explaining, I will not go into it here! Speed, rpm speed in this case! is a universal physical influence on anything - T1 or not - there are no exceptions in application of physical laws. Ok, I stop here, it makes no sense to pursue this to the very end - there is nothing else but always the same.
To be sure:
Anyone may have their own ideas and preferences or convictions - but the I claim the same right for me and please leave me alone with this sort of stalking really! Ever since the day you claimed the delta truck of my 2-8-8-6 to be "almost" where it should be it was like that: whenever I had posted something - anything! - popp! there was a criticizing comment of your's to it! Look, that six-wheel delta truck was not just 'almost' where it should be - that was an insult to an engineer. I can rightfully say that since I designed the layout of the whole locomotive I put things *exactly* where I want them to be and that is *exactly*where they belong because I know what I'm doing. Back then I really got weary of it and in the end I just quit posting here. Now, again the same! But now I will not quit again - you have to throw me out if you can't stand my words.
I offer you the following agreement:
You don't comment my postings anymore - and vice versa I do not comment yours!
Would that be an acceptable compromise to you, Mr Overmod?
In this sense
All the Best for the New Year 2021
Juniatha
(edited Jan 16th 21)
One change NYC did make to the trucks was to replace the standard wheels with cylindrical (non-tapered) wheels.
The track section was 127 lb. jointed rail. The test area was lifted and resurfaced, but was still below NYC standards.
SD70DudeI'm going to guess that RDC's have a compressor directly driven by the engine.
... were any modifications made to enhance the braking performance of this unit? In particular I'd be concerned about brake fade (overheating).
Remember that this was not intended as a 'service train', nor was it expected to make the equivalent of 'touch-and-go' acceleration and deceleration. Much of the acceleration from high speed would be in part aerodynamic resistance, well down into the range the existing disk brakes would serve nicely.
We had some discussions about the APT designers' perceived need for hydrokinetic braking (from 150mph) in light of what these jet trains could achieve. In particular this was a relatively light test article, running on a dedicated (and traffic-protected) stretch of track without fixed speed restrictions or slow orders. And it used proportional passenger braking. As I recall, no untoward action from the braking was observed during the tests.
I remember thinking as a kid that it might be possible to use what was then called 'beta thrust' to help with the deceleration -- I think the Bennie Railplane was intended to do that by reversing the pitch of its propellers, and I suspect the Russian "HSR Listowel and Ballybunion" might have done the same. The ex-B36 pod did not have any provision for reversers, to my knowledge, but I suspect the capability could have been provided on following 'articles' without too much despair.
Getting off track here - why not? The chase GP7 would have been able to pump up the air reservoirs. As far as I can find out they didn't do any brake mods. The good old Budd discs (presumably with Rolakron anti-lock system) were probably just fine. I think the track in use was probably cleared all the way from Toledo to Elkhart.
Overmod SD70Dude Electricity? Air, Bob.
SD70Dude Electricity?
Air, Bob.
Duh. Of course, all that power and speed is pretty useless if you can't stop!
I'm going to guess that RDC's have a compressor directly driven by the engine. But now I'm curious, were any modifications made to enhance the braking performance of this unit? In particular I'd be concerned about brake fade (overheating).
SD70DudeElectricity?
Overmod rcdrye I assume they did nothing to the 6-110 diesels, in fact they most likely were running during the tests so the crew would have air conditioning. If I recall correctly, it was one of them -- and there is a much more important reason than air-conditioning to run it!
rcdrye I assume they did nothing to the 6-110 diesels, in fact they most likely were running during the tests so the crew would have air conditioning.
If I recall correctly, it was one of them -- and there is a much more important reason than air-conditioning to run it!
Electricity?
rcdryeI assume they did nothing to the 6-110 diesels, in fact they most likely were running during the tests so the crew would have air conditioning.
All NYC did to the RDC trucks in the M-497 tests was remove the drive shaft and Spicer drive on each truck, an easy task as they were designed to be removable. I assume they did nothing to the 6-110 diesels, in fact they most likely were running during the tests so the crew would have air conditioning.
This post removed because perceived as 'insulting'. No insult was of course intended; I do not go back on my word.
Those who may remain interested in the history of American experimental steam, and other concerns, may PM me at their convenience.
1.10 ?
????????????????????????
Ooooohhhh! I seeeeeeeeeeee-he-he-he - geeeeee!
You mean 01-10! (speak oh-one-ten, or after 1968: oh-twelve for 012)
Well, you don't know about the numbering system of the Reichsbahn / Bundesbahn - ok:
Express locomotives of the standard types (1925 / 1950) are numbered as classes 01 to 10. Mind the 'O'! Because these series designations are *always* two digit.
Then there is a free space, then the individual number of the engine within this class - started with three digits 001 to 999, it became obvious later on that this didn't suffice, so larger numbers of freight locomotives, mainly got four digits from # 1000 upwards. This meant there was a 44 290 and a 44 1290 or a 50 078 and a 50 778 and a 50 1778, for example. On the number plate, which shows class - two digits - plus individual locomotive number - three to four digits - there is no point, dot or spot. There is just the space as between two words. Note that in this classification the first locomotive is 001 (not 000 or rather xx00 as in the USA)
Now, it turned out that there were certain loco classes they didn't want to give a new number as they were rather seen as further development of the original class, they were given a new, as yet free (not used) block of hundreds or thousands for counting the individual engines. In quoting the new class 'variation' the first digit of the hundreds / the first and second digit of the thousands is noted as an index (high) - or simplified as a normal digit behind a dot (not a point, less so a sign of fraction)
As for instance class 01, heavy standard Pacific:
Original engines 01 001 to 01 231; added the rebuilt 10 class 02 four cylinder Pacifics as 01 232 to 241 - all these were class 01 engines
1960s substantially rebuilt DR 01s became engines
01 501 to 535 - they were 01.5 engines
The three cylinder variation of the 01 were numbered 01 1001 and 1052 - 1104 they were thus class 01.10 in short.
Since of the 44 class three cylinder Decapods almost two thousand were built there were numbers 44 001 to 010 prototypes (service tested against the two cylinder 43 001 - 010; then two 25 bar four cylinder compound engines were realized as part of another large scale test; then with # 013 to 065 came the intermediate design and from 066 to over 2000 came the final design. Since after 1945 all the earlier engines were no longer in service it remained simply the 44 class. When the Reichsbahn, DDR, rebuilt some engines with new welded boilers as replacement for worn orginals, there was no special series number given. However when DB renumbered all their engines, the oil-fired 44s became new class 043 (the original 43 was not in service on DB); when DR also did their renmbering the oil-44s became new 44.0 and the remaining coal fired engines of the class became 44.10 for 1001 or higher - some engines in each case had to be renumbered to fit to the new system.
The 52 class light Decapod brought the old system to its limits because of the original engines already some 7800 had been built (it is not exactly known how many to the engine had all in all been built since after 1945 several re-established railways had more engines built, so in France (at Gafenstaden), Belgium (Tubize) Denmark, Norway, Austria (Wien Floridsdorf) Poland (Crzanow - speak Chshanoh), Tchecoslovakia (Skoda, CKD), Yugoslavia (rebilding only), Bulgaria, Roumania (Resita) - on the other hand Russia had confiscated 52s by the thousands, known under the nickname simply 'the Woman' or 'the German Woman' she got highly popular with the Russian railroaders - well as a woman I could think of better .. but as a locomotive, that's probably something different). So the various railways in Europe for some time after '45 had some sorting out to do to get their 52s all properly numbered and put in service. In Austria there was the mysterious case of one 52 suddenly on the site and nobody knew how she had come there, all it looked like by the 33 class given she had come back up from Yugoslavia; in order to be sure to avoid doubling numbers they assigned her the quasi 'artificial' number 52 8000 - and when some Yugo railroaders appered then asking for 'their' 33 class locomotive the Austrians just said "No such locomotive here!"
But it didn't end there: in the 1960s the DR in DDR (Eastern Germany) decided not only to upgrade a number of 52s to full standard equipment but also to rebuild 200 engines with new combustion chamber boilers and re-number them class 52.80 - intriguingly thereby forcasting the decade when regular steam service would end on DR. One such engine - 52 8055 - was tested in Switzerland in the 1990s prior to rebuilding and developed some 700 ihp above the original - due to the superior steaming of the 1960s boiler when fired with good quality coal.
Yet this was still not the end since DR, always looking to fire brown coal or soft coal, rebuilt a number of locomotives into coal-dust burners and classsify them as 52.90 that were known to be very dusty indeed and crews always tried to avoid them. But the Wendler system worked well and saved DR a number of expensive coal imports.
No 52 was ever professionally rebuilt to oilfiring - if we don't count the rather makeshift arrangements by the Russian railways on individual engines and the lone 52 8055 that got diesel-oil firing in Winterthur, got rebuilt and rather heftily fouled up beyond recognition. Well, that showed how lucky the design and appearance of the 52 class really was - although from the start no one had - officially - been charged with the task of tuning this into a good looking locomotive and if you may look at Mr Degenkolb as her 'father' (design supervisor) he was a strictly logic and down to facts engineer, even rude in some ways and certainly no artist with a fine hand.
And yet ...
daveklepperOr is it possible that the track was not as well maintained?
==> YES <==
J
Arnold Haas - well, yes, uhm ...
He also wrote a Niagara would accelerate faster from 80 to 100 mph than from 60 to 80 - which would only be possible if the mean tractive effort would be larger in the higher speeds - which by itself is virtually impossible.
The Niagaras had comparatively very small cylinder volume for given boiler pressure (in relation to both their adhesion mass and their steaming capacity, that's why their highest indicated output was only reached around 75mph at 52% cut off - a very inefficient, long c/o. I think Paul Kiefer didn't want to take risks on too high a piston force and / or to long a piston travel. With a cylinder volume half ways more to the example set by the N&W J class the Niagara's ihp could have surpassed the 7000-mark easily and on the same coal consumption ... however maybe Paul Kiefer was wise not to overdo things - today substantially larger piston forces would be no problem with superior materials.
All those questions of 'how fast did she go' and 'how fast did she really go at maximum' and 'if we allow the engine to throw rods way ahead in the event - what speed at maximax could at-all ever have been reached for just a moment' are fine and exiting to those who do not take a closer look at what it takes beyond boiler power and ability of cylinders to operate the filling and exhausting in a half ways civilized manner - as is when the valve gear will work orderly and keep together by that. Mind that with a 20% over-revving, forces reach 144% of the design maximum. Who will tell me it can stand that for any longer than a few minutes?
If we take instead a look at the permanent road bed then we must ask where in hell should an engine have even reached such speeds before outrightly derailing? Name me the 1930s 1940s track if you can? I bet you there was none - not with the universal simple nailed rails and that sloppy joined rails and that minimum of 'dirt' embankment.
Some years ago I saw an advertising film by the Pennsylvania, it was to show how soft, caring and smooth the passengers travel on the PRR high speed mainline track. Now, I must say, they were being bounced around quite a bit and swayed sideways - and at what speed? watching the outside trees and houses go by it was some 80, 85 - at best! All in all it was more like on the - sorry - PKP, the Polish state railway when in the 1990s they had been cought by the fresh wind of change and had put on some speed, rising from 100 km/h mostly to more 120 km/h stretches, just like that, track upgrading only following year by year. That said, I had also witnessed an upgraded electric line travelling from Bydgosz to Warzawa: that was 100 mph on all-welded, straight and billard table level track, the neighboring rails were dashing by without showing any flares or buckles in the flow. Had the Pennsy had this sort of track I would consider 110 - 120 mph for some T1 rides - but still not like 'more often than not' or as last run of a worn down neglected engine! Let's ignore a number of points standing against these high speed claims and look just at the fact that over-revving would have soon worn down the cam surfaces if no more of the poppet valve gear. Now, it should be self-understood that from an engine no more having any precise - and even! - timings for steam exchange you cannot expect any extraordinary performance and speed because the erractic valve events cannot help but counterblock working quality of the engine. As long as things haven't gone too far, there is an interesting balancing happening: since the steam wasted is adding to the intensity of draughting the boiler can likely come up with the extra amount of steam asked - however what's wasted gets fully lost to cylinder performance - i e although the engine makes an extra amout of steam it gets weaker in cylinder power - and this very soon leads to it's failing to live up to demands, less so can it be extended to produce an extra amount of power output. Since wind resistance goes up by the square of speed increase and running resistance also tends to increase because it becomes less acurate, involves more flange / rail contact and generally more abortive movements of the train consist, we can roughly assume the extra power demanded to pull an existing train not at 100 but at 120 mph is about 40% larger. Where is this extra output supposed to come from? 6500 ihp - when 100% in good shape! does not make me all too optimistic for such a reserve!
Also, I must say, for any such very high surpassing of regular speed limits, the engines all lacked drive wheel diameter. At some 2 metres (79") riding diameter and 200 km/h (125 mph) the rotational speed is 531 rpm - very, very high for any steam locomotive, let alone two cylinder engines. That was the only plus side of the PRR Duplex engines S1 and T1: they had four - the #6100 had a 7% larger riding wheel diameter - but for her capacity of boiler and four piston valves which were for once not cramped between distance of cylinder covers but had (a minimum of) proper exhaust chambers and more straight inner steam passages this was still clearly on the small side for any attempts to go 120 mph and better. 90 ins would have been nearer to it - myself, when I had put up a free design of a 6-4-4-6 engine with an 8-8 tender I gave her 100 ins wheels to run 140 mph regularly - with full equipment of roller bearings on axles and light weight rods - but with Walschaerts / piston valves on outside cylinders, if of ample steam passage cross sections since this still means 470 rpm - still very fast for a steam locomotive - more so for a very large and powerful one! No, she doesn't have four cylinders, nope, not six neither - but two times four cylinder compound engines with the HP outsides. That means the engines are self-balanced and I don't have interference of disturbing reciprocating actions nor any loss of adhesion with increase of speed above that which is due to the more vivid action of the wheels on rails (even with a smooth running locomotive where the drive sets are being protected by each the 6 wheel bogie and delta truck).
In the article by Arnold Haas that appeared in the German Lok Magazin #49 about 1971 he claimed that super fast run in 1949 - in other words when the engine if it had still existed at all, had been on the scrap track for years. If the engine drawn back out from there, just set to steam and put right on the line to make up a large lateness by going 'a little faster' this day would have come up with 140 mph - then it becomes fully inexplicable why she should have been put back there and scrapped - in other words as an American Hero, there is nothing to be expected! Or what?
Well, I believe someone just didn't like that plain Loewy 'farmer daughter's dress' drawn over the front - but it wasn't me folks, I wasn't even born for another 27 years ..
(double posting - sorry)
As you know, the Germans were quite unwilling to surpass the 400rpm rotational speed, which is about 150kph / 93 mph with 2000mm drivers. (Compare this to a J going westward to Chicago....). The last batch of the 01.10 had been equipped with roller-bearings, but there was simply no experience with light-weight alloys that time (at least not with locomotives...). The standards for most locomotive parts, as they had to be exchangeable, were set in the 1920s, and the chief mechanical engineer of the DRG was quite conservative to say the least...
These streamlined pacifics were given a top speed of 150kph. After the war, when the streamlining - or what was left of it - had been removed, this was reduced to 140 kph. When 01 1102 was returned to life, it received just minor improvements, as a full boiler insulation due to concerns the blue color might suffer from the boiler heat in the long term.
After 01 1102 was re-streamlined, it was test-run and achieved 160 kph/99mph on February 9, 1996, so becoming the fastet 01.10 ever.
Surely, it would be the ideal candidate for Porta-or Wardale-style improvements, yet it depends on the owner, his financial capacities and his will. Luckily, there are no speed restrictions for steam here, but the track infrastructure has been cut back badly. Hardly any sidings to be found on many lines. You can run steam on the DB, but as you need slots between the scheduled DB trains, the faster the engine, the better! The usual steam specials are powered with locomotives going at least 80 kph/50 mph. The right place for the T1 is here...;-).
When we saw old 1309 in Baltimore the first time in 2012, no one then believed its fate might turn out as it did, but no matter how long this restoration might take - theft, lacking of funds plus the curve/turntable issues - 1309 is going to be a winner soon. For 01 1102 things look rather bleak, it will most probably remain cold. Heavy overhauls cost in the range of half a million here, and then you have six years only to go.
Roger Waller surely would know what to do if he had his hands on it. Wider steam passages, slightly higher boiler pressure, even better insulation of course (cylinders included), new blast pipes, may be even compounding.. probably poppet valves might be a "nice to have" too, of course Franklin B..
The one advantage 01.10/03.10 and 05s surely had over the PRR streamliners was a casing which had been tested before in a wind-tunnel. What they didn't have was the looks of a T1...
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