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| Of brake stands and piping (467766) | |
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| (467836) | |
Re: Of brake stands and piping |
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Posted by Hoghead on Sun Jul 29 04:14:20 2007, in response to Of brake stands and piping, posted by SelkirkTMO on Sat Jul 28 23:40:58 2007. I liked the 26L brake equipment. It worked very well. Many complaints I heard were not because of the brake equipment--they were actually caused by sloppy maintenance. For example: big whine from the hogger: "I can't take this train out--the automatic leaks down when the air is set." Well, when this happened, there was a pretty good chance the locomotive had a recent inspection. Air guages were tested, and when re-connected to the brake system, the connection at the equalizing gauge was not tight. The automatic brake handle controls the air in the equalizing portion--the rest of the equipment matches the brake pipe pressure to whatever the equalizing pressure is--if there is any leak at all in the equalizing portion, self-maintaining does not work. The good news is the feed valve is in a very handy position, so the smart hoggers had no problem braking their train using the feed valve. Definitely beats reaching to the floor or some other awkward position to adjust the feed valve as on some other types of brake equipment.The other most common complaint was probably the feed valve freezing up in very cold weather. That was caused by moist air. Locomotives used to have no air drying equipment whatsoever. Railroads would dump alcohol in the main reservoirs to help control the water in the air. Modern day locomotives have excellent moisture control equipment on the air systems. It could get pretty interesting trying to operate a mile long train when the temperature was 35 degrees below zero and the feed valve kept freezing up. You have the air set on a down grade. The feed valve freezes up. You give the brake stand a hard whack with a monkey wrench or the nearest heavy object. Feed valve breaks loose. Only problem is: the 3 or 4 pound increase in brake pipe pressure when the feed valve broke loose may be enough to release the brakes on your entire train. Whee. Away we go. Or, flying along at 60 MPH when the feed valve freezes up. Whacked it and got the air flowing again. Only problem, there was enough of a brake pipe reduction to cause some cars to set, but not enough of an increase for a clean release, so you have to do maybe a 10 pound set, then release, then hope the feed valve does not freeze up with the rush of cold, moist air charging the brake pipe. Of course, there is the dynamic brake (called the dramatic brake by a now deceased hoghead because "you were never quite sure what was going to happen when you used it")--and the newer locomotives have amazingly good dynamic brakes. However, after a run of a thousand miles through snow and blowing snow without using the air brakes, it can be quite interesting tring to hold the train on a hill--there is so much snow and ice on the brake shoes, they will no longer effectively brake. I recall an instance of a unit coal train that had a knuckle failure near the head end. The rear 100 cars or so of the coal train--brakes in emergency--took off and rolled several miles down hill. The train had been operated a long distance through lots of snow, using dynamic brakes only. |
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| (467838) | |
Re: Of brake stands and piping |
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Posted by SelkirkTMO on Sun Jul 29 05:31:49 2007, in response to Re: Of brake stands and piping, posted by Hoghead on Sun Jul 29 04:14:20 2007. Heh. Definitely not something I'd want to do. :)Even with subway cars, humid summers of Coney Island were no fun either. Nothing like dumping a train, letting the air out after applying handbrakes and then opening the reservoir cocks to at best a spray, or worse a cloudburst. Heh. For those who are unaware, the tanks fill with water after sucking in all that humidity at pressure and when the pressure went away, it would all condense and leave a lake inside the reservoirs. And if the tank was full of water, then you weren't gonna get your air. So when you did a layup, you had to drain them and you'd best check before doing a putin to be sure whoever laid it up did so. Ah, don't miss that at all. =) |
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| (467839) | |
Re: Of brake stands and "dramatic braking" |
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Posted by SelkirkTMO on Sun Jul 29 06:15:38 2007, in response to Re: Of brake stands and piping, posted by Hoghead on Sun Jul 29 04:14:20 2007. Heh. LOVE the comment ... I've often told of why I was always willing to take out the AMUE stuff instead of SMEE for that very reason. The old AMUE stuff dates back to the early 1930's and had no dynamics at all. Electric assist propagated what the ME-23 stand ordered up which made application quite nice and reliable as long as the 32 volt voltage drop through all those electric portions, relays and magnet valves eventually caught up to you.The R-10's were the first SMEE's in the system (self-lapping with dynamics - well sorta. heh) and they were HORRIBLE as far as the dynamics went, and while you could cut them out, you REALLY didn't want to. The amperage control was pyth-poor so when you took a good service app ("keep them moving, stop them fast") the wheels would just lock up and slide. The infamous "8-edged wheels" of artens were caused by this behavior. And when they faded, each car seemed to fade at its own rate causing individual cars to go over to air, but never all of them at the same time. I've referred to this (as have others) as the "rubber band effect" when dynamics die and the magnet valves finally apply some air. "Bucking Broncos" is about the best I can describe it. Anyone who ever rode them knows what slowing down and stopping were like in those. Meanwhile, the old arnines (AMUE) could stop like a CADILLAC if you knew how to work them and didn't brickwall by knowing WHEN to release and how much to hold with the electric brakes after you did. The R-32's were MUCH better than the artens although as originally delivered (like the 11's through 30's) they were a pain in the rump too though the severity of wheel lockup wasn't anywhere near like R-10's. The dynamics were just WEAK compared to the artens, and seemingly faded faster. I never liked dynamics. First time I encountered dynamics that were NICE was on the R-143's ... VERY smooth handoff from drag to air. But on all of our car classes, when you ran in snow and ice, you always knew to bite a couple of pounds and not release it all just to keep the shoes setup on the wheels. My understanding is that on most of the current fleet, there's actually now a "snow brake" position which we didn't have years ago. Looks like that old trick worked out after all. :) Just wanted to say THANKS for the convo ... to me, this is a WHOLE lot more interesting than the usual stuff! |
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| (467841) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by Railman718 on Sun Jul 29 06:22:15 2007, in response to Re: Of brake stands and "dramatic braking", posted by SelkirkTMO on Sun Jul 29 06:15:38 2007. Very good information passed between you two thanks..Learn something new everyday.. |
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| (467846) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by SelkirkTMO on Sun Jul 29 06:34:54 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by Railman718 on Sun Jul 29 06:22:15 2007. Heh. I've been enjoying the (mica) schist out of it myself ... wish there were MORE of this kinda stuff. And am hoping Unca Jeff and a few others can chide in. One of the things I liked about Pirrman's place was that there was a LOT of "tech talk" there. But the place was downright ANAL. Here, seems if you don't take the same old 3/4 shots of the same old trains and post PHOTOS, you're nobody. :(I'm REALLY into the tech bits when they come around, and even more into just the war stories that nobody tells publicly anymore. And of course, the PEOPLE who do 2 or more trips a day and are dumb enough to come back the next day and do it all again. Heh. I was one of those! (grin) |
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| (467848) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by Railman718 on Sun Jul 29 06:45:52 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by SelkirkTMO on Sun Jul 29 06:34:54 2007. Heh there are quite a few that Nobody knows about...Well at least in from Jon-Q-Publics's point of view.. |
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| (467849) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by SelkirkTMO on Sun Jul 29 06:53:26 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by Railman718 on Sun Jul 29 06:45:52 2007. And sadly, OBVIOUSLY needs to be that way ... :(But I s'pose it's OK to talk about the tech ... ain't of much use to "terroristas." :) |
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| (467852) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by BLE-NIMX on Sun Jul 29 07:32:05 2007, in response to Re: Of brake stands and "dramatic braking", posted by SelkirkTMO on Sun Jul 29 06:15:38 2007. I had a NYCT work train where I used the feed valve for an application to see if that theory worked. Failure of a brake valve is very rare and because of the CEV, it probably was never used as such. I'm surprised folks in our days didn't drop the control breaker to make stops. Much better then pulling 8 or 10 #5 fuses and you are simply relying on properly set J-Relays instead of those erratic rheostats. They never should have installed J-14Ds on the R10s the way they did. They had one green car they reverted back to J1 and Cast Iron and it didn't appear to have flats again despite the dynamic woes. The R30 and R36s had the heaviest set dynamic, GOH R32s had the worst (when they arrived on property), the R62A has the worst handbrakes that will roll with all of them set at 137 and there is a "Corona Extra" awaiting to be run. |
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| (467856) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by SelkirkTMO on Sun Jul 29 07:59:30 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by BLE-NIMX on Sun Jul 29 07:32:05 2007. Yo! Howdy! And here I was thinking YOU were going to actually found a religion on them pesky artens. Blasphemy, fodder! (grin)Well ... a stuck float valve is what got ME tossed off the property. Dropping the controller did nothing either since somehow that line was "plugged up" too. :-\ Only thing that dumped the train that cost me my Empty-yay lifestyle was pulling the EBV by the electric panel. But by the time I got to it, not enough time to avoid ramming the layup on the ladder ahead of me. Accident, derailment. :( Dunno WHAT the problem was with those artens and their design. When the rails and wheels were DRY, those suckers GRABBED ... the dynamics on those bad boys were something to FEAR. Thought you'd never hit air by the way they brought those down in speed PRONTO! But they had a really nasty wheel lockup problem, which of course once the amps stopped, wheels rolled again and then they'd lock UP again. HIGHLY vibratory stops if you pulled hard. And then explain why you were dragging flats after the wheels melted down to the axles behind you. I *hated* artens but was fortunate enough to have avoided the A line. Only did those in schoolcar and ONE trip on a "goes to Coney for a repair, YOU take it.) Heh. The 32's had been on the road for over ten years and were pathetic in their dynamics. However, the FIRST thing I noticed about the 32's was that it appears as though the dynamics NEVER stopped when running. With arnines, one of my "religious observances" was grabbing a hot hero (usually Veal parm) at that joint a block east of Stillwell and just leaving it in foil on the floor in front of the cab heater to keep it nice and toasty. CPW was IMPORTANT to me because I could center up the reverser and coast on arnines. On the 32's and 42's (though it was a LOT worse on the 32's) the centering up didn't work (but you could still hang your bag for "hands free" - won't say any more) but those (*_$^#&%@! dynamics were "always on" and as soon as you went to coast, the train would start dragging as though you'd applied. :( And when you NEEDED braking on the 32's, they'd pussy out on you compared to arnines which COULD give you a "hard brake" as you missed your usual application position entering a station. And as long as that witch was still moving above 5 or so MPH, what you got HANDED by the dynamics was ALL you were going to get. And some of those bad boys were REALLY weak. :( People wondered WHY I *wanted* to run the "old wrecks." Heh. Bottom line though, "dramatic braking" ... I *LOVE* it! Moo. |
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| (467869) | |
Re: Of brake stands and piping |
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Posted by BIE on Sun Jul 29 09:25:50 2007, in response to Of brake stands and piping, posted by SelkirkTMO on Sat Jul 28 23:40:58 2007. You ought to check uot a "full dress" 24RL system with train control. DAMN, talk about a plumber's nightmare!!! |
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| (467881) | |
Re: Of brake stands and piping |
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Posted by SelkirkTMO on Sun Jul 29 10:05:04 2007, in response to Re: Of brake stands and piping, posted by BIE on Sun Jul 29 09:25:50 2007. Sorry ... plumbing on the 26-L did it for me. :)ALL these many years, have TRIED to figure out why I got soaked in (ta) title. Got told it was "sabotage by the union for your political activities." *NOW* I know for sure they were RIGHT. :( Ah well ... Empty-yay cured my foaming problem, got a LOT better after leaving the teeyay, and can actually look back after all these years in a nostalgic tone even though I *hated* the railroad with a passion that can only be declared Islamic. Heh. But thanks to this place, and all of you guys, I'm cool. Heh. |
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| (467889) | |
Re: Of brake stands and piping |
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Posted by Railman718 on Sun Jul 29 10:15:16 2007, in response to Re: Of brake stands and piping, posted by SelkirkTMO on Sun Jul 29 10:05:04 2007. We will see "how" much RTO cures foaming this week..NewJack T/O's are posting.. The Hows, Whats, Wheres and Whens i dont know. What i DO know is im the Only T/O posting on that Echo out of Parsons on Monday. Of coruse there is 179th and WTC they can start in as well.. |
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| (467905) | |
Re: Of brake stands and piping |
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Posted by SelkirkTMO on Sun Jul 29 10:43:22 2007, in response to Re: Of brake stands and piping, posted by Railman718 on Sun Jul 29 10:15:16 2007. Heh. Just DO your time, pay your debt to "society" and NEVER pick that line for the winters. F is bad enough, E don't go outside. You get the smell. :) |
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| (467910) | |
Re: Of brake stands and piping |
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Posted by Railman718 on Sun Jul 29 10:56:44 2007, in response to Re: Of brake stands and piping, posted by SelkirkTMO on Sun Jul 29 10:43:22 2007. Kevin NO WAY im picking Anything out of Queens..The Only "If" is the Nancy(Perhaps the Wiskey but holds breath on both) out of Astoria if RDO Relief in the South is jacked.. Which it shouldnt be but hey who knows.. |
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| (467951) | |
Re: Of brake stands and piping |
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Posted by BLE-NIMX on Sun Jul 29 13:07:00 2007, in response to Re: Of brake stands and piping, posted by Railman718 on Sun Jul 29 10:56:44 2007. They were in a phucked up habit of covering Astoria runs with WAA guys instead of board guys. With the 40 minutes or so of WAA they add to all the runs there, it is not necessary for them to even think about assigning a board man there, thats why they all goto Bedford Pk or Stillwell. MAybe its different with the WHISKEY. I think I'll have a shot. 1 Corona wasn't enough. |
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| (467957) | |
Re: Of brake stands and piping |
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Posted by Railman718 on Sun Jul 29 13:17:13 2007, in response to Re: Of brake stands and piping, posted by BLE-NIMX on Sun Jul 29 13:07:00 2007. Yeah i kinda noticed that with some of those Jobs..As well as very few Xtra Board persons reporting there.. |
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| (467971) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by Mr Mabstoa on Sun Jul 29 14:24:00 2007, in response to Re: Of brake stands and "dramatic braking", posted by SelkirkTMO on Sun Jul 29 06:15:38 2007. So there is no way to strictly use dynamic brakes on NYC subway cars like you can with a diesal freight locomotive which has a dynamic brake range on the throttle? |
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| (467973) | |
Re: Drying; Of brake stands and piping |
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Posted by RonInBayside on Sun Jul 29 14:30:55 2007, in response to Re: Of brake stands and piping, posted by Hoghead on Sun Jul 29 04:14:20 2007. Power plants use dryers extensively to control humidity.Drying is the subject of much engineering development. This applied science even has a peer-reviewed journal: Link here |
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| (467983) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by Railman718 on Sun Jul 29 14:42:23 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by Mr Mabstoa on Sun Jul 29 14:24:00 2007. You have Dynamic braking then friction kicks in i think with the techs after 5 or 3 miles..With the older equipment its 10 mph .. If im correct .. |
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| (467986) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by Zman179 on Sun Jul 29 14:51:50 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by Railman718 on Sun Jul 29 14:42:23 2007. You have Dynamic braking then friction kicks in i think with the techs after 5 or 3 miles..With the older equipment its 10 mph .. If im correct .. With the older equipment, friction braking comes in at around 3 mph. With the R143's there's a difference. When coming to a station stop from regular speed, the friction brakes will kick in around 3 mph. However, if slowing down from regular speed then asking for minimum power, friction braking will be prevalent at speeds less than 8 mph. I speak from experience on working the L line when entering the terminals. |
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| (467988) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by BLE-NIMX on Sun Jul 29 14:58:54 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by Zman179 on Sun Jul 29 14:51:50 2007. That same scenario happens with SMEES too on a more limited basis such as rolling from a stop downgrade without going to series first or switching only before applying dynamic. |
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| (467989) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by BLE-NIMX on Sun Jul 29 15:02:04 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by Mr Mabstoa on Sun Jul 29 14:24:00 2007. INstead of having 8 notches of dynamic brake range which controls the engine only, there are several steps on SMEE, all controlled by trainline straight air pressure and individually limited car by car with load valve settings. You can not apply regulated dynamic brake on the head car of an MU |
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| (467990) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by Zman179 on Sun Jul 29 15:06:48 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by BLE-NIMX on Sun Jul 29 14:58:54 2007. Another funny thing with the SMEE equipment: if I'm stopped on a downgrade, then I release the brakes and let the train gain speed via gravity, the speedometer won't work. I could be going 25 mph and the speedometer will say zero. But as soon as I put the controller into one point, it'll read 25. Funny quirk. |
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| (467991) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by Train Dude on Sun Jul 29 15:08:54 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by Zman179 on Sun Jul 29 15:06:48 2007. What type of equipment do you find that on? Is it all cars or just some? |
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| (467993) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by Railman718 on Sun Jul 29 15:12:41 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by Train Dude on Sun Jul 29 15:08:54 2007. I found it on R62A's... |
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| (467994) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by Railman718 on Sun Jul 29 15:12:56 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by Zman179 on Sun Jul 29 14:51:50 2007. Thanks Zman.. |
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| (467995) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by BIE on Sun Jul 29 15:14:01 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by BLE-NIMX on Sun Jul 29 15:02:04 2007. There aren't really 8 NOTCHES of dynamic brake on a diesel. When you throw the selector from MOTORING to BRAKING, the throttle notches are disengaged and the throttle sweeps through its range of motion. |
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| (467996) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by Train Dude on Sun Jul 29 15:15:31 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by Mr Mabstoa on Sun Jul 29 14:24:00 2007. Dynamic is there only if certain conditions are met and for the most part are out of the operator's hands. If you meet the following 4 conditions:That the dynamic brake circuit breaker is on in every car. The propulsion circuits in the car are functioning. The train is moving at a speed greater than 5 MPH. The operator is calling for some amount of service brake. Then you will have dynamic brake. It's not within your control whether to have dynamic or friction brake. The particular car 'decides'. |
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| (467999) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by Train Dude on Sun Jul 29 15:17:52 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by Railman718 on Sun Jul 29 15:12:41 2007. I believe that the "zero speed blanking feature" on the speedometer should respond to any train movement independent of the master controller setting. Curious! |
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| (468000) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by RonInBayside on Sun Jul 29 15:20:03 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by Zman179 on Sun Jul 29 15:06:48 2007. Possibilities:1. The speedometer is not connected to the axle; it does not count revolutions and translate that into a speed reading. If such is the case, how does it measure speed? Through a correlation with the power taken from the third rail? 2. It is connected to the axles, but is a powered device, meaning you must put a current through it to make it work. 3. ?? |
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| (468002) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by RonInBayside on Sun Jul 29 15:21:47 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by Train Dude on Sun Jul 29 15:17:52 2007. Digital speedometers on luxury cars exhibit a lag. For example, I've been in a car when the driver brought it to a complete stop; the speedometer still showed 10 mph for a two seconds before it dropped to zero. |
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| (468003) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by RonInBayside on Sun Jul 29 15:23:52 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by Train Dude on Sun Jul 29 15:15:31 2007. Except for emergency braking, correct? If the operator selects BIE he is selecting friction braking, correct or not? |
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| (468010) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by Train Dude on Sun Jul 29 15:29:26 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by RonInBayside on Sun Jul 29 15:21:47 2007. That has to do with the "refresh rate" of the sensing circuit. IIRC the NYCT spec. is 100 ms. |
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| (468015) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by Train Dude on Sun Jul 29 15:31:09 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by RonInBayside on Sun Jul 29 15:23:52 2007. Essentially correct, but in BIE condition the propulsion circuits are disabled by a zero brake pipe. |
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| (468018) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by RonInBayside on Sun Jul 29 15:31:24 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by Train Dude on Sun Jul 29 15:29:26 2007. Thanks. |
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| (468024) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by RonInBayside on Sun Jul 29 15:33:55 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by Train Dude on Sun Jul 29 15:31:09 2007. Thank you. |
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| (468071) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by Mr Mabstoa on Sun Jul 29 16:27:48 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by Zman179 on Sun Jul 29 14:51:50 2007. So there no dedicated portion of the brake valve just for dynamic braking, its automatically done? |
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| (468073) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by Mr Mabstoa on Sun Jul 29 16:30:50 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by BLE-NIMX on Sun Jul 29 15:02:04 2007. Does this something to do with realeasing a trains brakes in running release and full release?If you do it in full release not all the electric brakes release at once but one car at a time? |
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| (468080) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by Mr Mabstoa on Sun Jul 29 16:37:34 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by SelkirkTMO on Sun Jul 29 06:34:54 2007. I agree with you. About a month ago you posted about all the infighting in here and it touched me. I have considerablly toned downed my attacks at my enemies in here to iniate the peace.But some can't even take a political debate or light hearted question before being called a KKK member, bitches and FU'ed. I try to take the high road because I agree sometimes there is nothing to learn in here and the one time I posted some pictures for people in here of a bus NYCT was testing the lighting and focus was of more importantance. I feel anyone who works 40 plus hours a week on the transit FRONTLINE and spends time in here to help buffs really love the business. From railroad guys, T/O's, B/O's, maintainence and supervisory, and all the rest I thank you and hope we can band together and at least support each other. BTW employee's of Vollmer industries DO NOT COUNT AT FRONTLINE TRANSIT EMPLOYEES! |
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| (468083) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by Mr Mabstoa on Sun Jul 29 16:45:03 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by Train Dude on Sun Jul 29 15:15:31 2007. Thanks TD.I was a documentary on History channel and it showed an engineer of a 100 freight car train who ran dedicated dynamics on a downhill to save brake wear. But even then with the weight of the train air brakes are kicked in once the train hits dangerous speeds in which loss of control will happen. |
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| (468085) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by Zman179 on Sun Jul 29 16:45:40 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by Train Dude on Sun Jul 29 15:08:54 2007. Let's see (jogging my memory)...R32's: definitely. I've done this a lot on the E from 7th Av to 5th Av after the tower crossed a V in front of me. R46's: never happens. R44's: definitely. A lot of times when the train is stopped and the controller is in a non-power position, the speedometer will turn off. If I put it in coast and the train rolls, the speedometer will still remain off. R68's: doesn't happen R40's and 42's: cannot recall. As far as this quirk goes, the 32's are tops. |
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| (468090) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by Zman179 on Sun Jul 29 16:49:08 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by RonInBayside on Sun Jul 29 15:21:47 2007. Digital speedometers on luxury cars exhibit a lag. For example, I've been in a car when the driver brought it to a complete stop; the speedometer still showed 10 mph for a two seconds before it dropped to zero.Yesterday on a 32, I did 4 mph with the doors open and the passengers getting on and off. Don't know how that lady with the twins in the baby carriage made it. LAMO. |
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| (468095) | |
Re: Of brake stands and ''dramatic braking'' |
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Posted by Mr Mabstoa on Sun Jul 29 16:50:45 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by Zman179 on Sun Jul 29 16:45:40 2007. I saw on a documentary that NYC had problems for years trying to get speedometers to work on its trains. The r44-46 speedometers were disconnected because they didn't work properly or were distracting to T/O's.The technology for the current speedometers come from military techware. Something about a laser bouncing from a unit under the car to the road bed and back. Surpirised with all the dirt, grime and conditions in the tunnels that they have stood up so well. (15+ years?) |
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Re: Of brake stands and ''dramatic braking'' |
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Posted by Railman718 on Sun Jul 29 16:51:35 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by Zman179 on Sun Jul 29 16:49:08 2007. Zman just curious you got my email right? |
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Re: Of brake stands and ''dramatic braking'' |
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Posted by BIE on Sun Jul 29 16:54:06 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by RonInBayside on Sun Jul 29 15:20:03 2007. It is an electrical generator at the end of the axle which turns along with the axle. The current it generates is measured and recorded by the event recorder and displayed at the operator's station. |
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Re: Of brake stands and ''dramatic braking'' |
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Posted by Zman179 on Sun Jul 29 16:56:27 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by Railman718 on Sun Jul 29 16:51:35 2007. Just read it, hadn't checked my e-mail in a few days.Whew! Next time, "save the drama for yer mama." |
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Re: Of brake stands and ''dramatic braking'' |
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Posted by RonInBayside on Sun Jul 29 16:57:35 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by BIE on Sun Jul 29 16:54:06 2007. Thank you. So it should operate at all times, unless the circuit path isn't there unless the operatotengages the handle. |
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Re: Of brake stands and ''dramatic braking'' |
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Posted by Railman718 on Sun Jul 29 16:59:19 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by Zman179 on Sun Jul 29 16:56:27 2007. Nah..Had about 20 Years of that from her... Dont need any more on that end.. Had to go to "Limo Country" for that huh? |
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Re: Of brake stands and ''dramatic braking'' |
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Posted by Zman179 on Sun Jul 29 17:04:26 2007, in response to Re: Of brake stands and ''dramatic braking'', posted by Mr Mabstoa on Sun Jul 29 16:50:45 2007. Some speedometers can become very distracting. Some will have a BO light dimmer feature (since disconnected) that will make the number blink like I just won on The Price is Right. Others will be super wacko and in a span of five seconds, I'll get a reading of 19, 42, 26, 0, 14, 9, 27, 34, and 12.However, when the "eye" gets a whole lot of steel dust and other miscellaneous schmutz on it, it'll simply say zero and not budge. Happens often. |
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