|
|
| Re: Flat wheel spots on the R46 (350225) | |
 |
|
| Home > SubChat | |
[ Post a New Response | Return to the Index ]
|
Page 4 of 6 |
||
|
| (351485) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by smooth on Mon Dec 11 10:51:04 2006, in response to Re: Flat wheel spots on the R46, posted by Jace on Mon Dec 11 10:41:05 2006. At least with respect to the new tech M7, news reports seemed to fault them for a lack of sophistication, that especially wheels slipping/sliding on leaf oil/grease was attributable to automatic over-reaction; it was mentioned that new software might help this problem. |
|
|
| (351499) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by Railman718 on Mon Dec 11 11:50:30 2006, in response to Re: Flat wheel spots on the R46, posted by RonInBayside on Mon Dec 11 10:46:45 2006. Maybe its been asked by somebody already hey you never know... |
|
|
| (351510) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by RonInBayside on Mon Dec 11 12:33:03 2006, in response to Re: Flat wheel spots on the R46, posted by Railman718 on Mon Dec 11 11:50:30 2006. Doesn't matter. What matters is that he asks and gets his own response. |
|
|
(Sponsored) |
iPhone 6 (4.7 Inch) Premium PU Leather Wallet Case - Red w/ Floral Interior - by Notch-It |
|
| (351514) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by Jace on Mon Dec 11 12:45:41 2006, in response to Re: Flat wheel spots on the R46, posted by RonInBayside on Mon Dec 11 10:49:08 2006. The tighter the wheel tolerance, the closer the speed between the wheels. Systems that require tight wheel tolerances need the wheels to be operating at close to the same speed. The sensors found in an AC system are only there because of the need to keep the wheels operating at very close to the same speed.Keep in mind that propulsion systems essentially link (electrically or mechanically) a single power supply to a group of wheels. A diesel hydraulic system requires that all wheels are operating at essentially the same speed as all of the wheels are ultimately driven from the same gear. Allowable wheel speed differences (and hence diameter) are then limited by the tolerance stack up of the components in the drive train. Electrical propulsion systems are essentially the same only the drive train from the power source to the wheel consists of fewer components: cabling and the traction motors. The characteristics of the motors then become the determining factor. |
|
|
| (351517) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by RonInBayside on Mon Dec 11 12:48:21 2006, in response to Re: Flat wheel spots on the R46, posted by Jace on Mon Dec 11 12:45:41 2006. Thank you! |
|
|
| (351553) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by Jace on Mon Dec 11 14:26:42 2006, in response to Re: Flat wheel spots on the R46, posted by smooth on Mon Dec 11 10:51:04 2006. They're plenty sophisticated, just require some tuning which is not at all uncommon. I don't know if it's the case with the M-7's but propulsion systems are so higly integrated with other systems that sometimes you have propulsion system problems creating issues for other systems (and vice versa). As an example, frequent propulsion system shutdowns on a given car may result in no dynamic brakes which in turn results in much greater friction brake usage which finally may result in premature wear and/or failure of air brake equipment and may even affect wheel life! |
|
|
| (351571) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by RonInBayside on Mon Dec 11 15:03:56 2006, in response to Re: Flat wheel spots on the R46, posted by Jace on Mon Dec 11 14:26:42 2006. Good points! |
|
|
| (351577) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by Railman718 on Mon Dec 11 15:14:52 2006, in response to Re: Flat wheel spots on the R46, posted by RonInBayside on Mon Dec 11 12:33:03 2006. IF he gets a response..Thats a big IF.... Supt's (Most of them In RTO) are not down here for PR... Thier job is to make sure that railroad runs... |
|
|
| (351578) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by Railman718 on Mon Dec 11 15:28:36 2006, in response to Re: Flat wheel spots on the R46, posted by Railman718 on Mon Dec 11 15:14:52 2006. Had to add this also i hope he does go through with it and he dose get a response,but the business part of it is they will tell him nicely..."Im sorry we cant help you with this right now"... The railfan in me is hoping they tell him.. "Hey maybe we can help you out how does this sound"?..... |
|
|
| (351583) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by error46146 on Mon Dec 11 15:50:12 2006, in response to Re: Flat wheel spots on the R46, posted by South Brooklyn Railway on Sun Dec 10 14:36:36 2006. How about Transitstuff?Not here since we'd all get warnings like in Straphangers |
|
|
| (351588) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by South Brooklyn Railway on Mon Dec 11 16:05:17 2006, in response to Re: Flat wheel spots on the R46, posted by error46146 on Mon Dec 11 15:50:12 2006. You got it. |
|
|
| (351589) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by RonInBayside on Mon Dec 11 16:12:40 2006, in response to Re: Flat wheel spots on the R46, posted by Railman718 on Mon Dec 11 15:28:36 2006. As long as he doesn't write, he can't possibly get a response at all. |
|
|
| (351596) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by 19characterusername on Mon Dec 11 16:25:21 2006, in response to Re: Flat wheel spots on the R46, posted by Jace on Mon Dec 11 12:45:41 2006. Also, AC propulsion is often frequency controlled. That is, the frequency of the input voltage determines the rotational speed of an AC induction motor. If two axles are driven by the same VVVF AC controller, they will be electrically geared together.The rotational speed of DC motors with commutation is controlled by input voltage to the stator and rotor coils. Commutation allows a wide range of balancing speeds under a wide range of loads with the same electrical input. |
|
|
| (351603) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by South Brooklyn Railway on Mon Dec 11 16:36:02 2006, in response to Re: Flat wheel spots on the R46, posted by RonInBayside on Mon Dec 11 16:12:40 2006. But i'm not gonna go through all that trouble just to see how the wheel goes through the truing machine. |
|
|
| (351610) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by RonInBayside on Mon Dec 11 16:48:47 2006, in response to Re: Flat wheel spots on the R46, posted by South Brooklyn Railway on Mon Dec 11 16:36:02 2006. Five minutes to write a letter? Do you want me to send you the postage? |
|
|
| (351617) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by South Brooklyn Railway on Mon Dec 11 17:00:03 2006, in response to Re: Flat wheel spots on the R46, posted by RonInBayside on Mon Dec 11 16:48:47 2006. No, i just don't feel like writing a damn letter. |
|
|
| (351620) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by RonInBayside on Mon Dec 11 17:02:02 2006, in response to Re: Flat wheel spots on the R46, posted by South Brooklyn Railway on Mon Dec 11 17:00:03 2006. So you're not curious about how truing works - at least not curious enough to ask about it?What if they offer to send you some information? |
|
|
| (351623) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by RonInBayside on Mon Dec 11 17:06:25 2006, in response to Re: Flat wheel spots on the R46, posted by 19characterusername on Mon Dec 11 16:25:21 2006. TThank you. However, although the same electrical input arrives at all motors, it is possible that the translation to mechanical output may not be the same (due to problems with the bearings, lubrication, or some moving part. This could cause the motors to go out of sync.Does this result in a warning displayed in the cab? |
|
|
| (351706) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by Edwards! on Mon Dec 11 18:19:06 2006, in response to Re: Flat wheel spots on the R46, posted by South Brooklyn Railway on Mon Dec 11 16:05:17 2006. humm... |
|
|
| (351714) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by Railman718 on Mon Dec 11 18:25:57 2006, in response to Re: Flat wheel spots on the R46, posted by South Brooklyn Railway on Sun Dec 10 14:31:56 2006. You go too fast with bad Flatz and see how fast that train could possibliy wind up on the ground, i wasnt taking that chance, not to mention i was only going 5 Stops..Then what are you going to say? Im not down here to do something careless like that and then wind up going to Labor Relations and trying to explain myself.. Which they wont hear any of it.. |
|
|
| (351728) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by South Brooklyn Railway on Mon Dec 11 18:38:09 2006, in response to Re: Flat wheel spots on the R46, posted by Railman718 on Mon Dec 11 18:25:57 2006. Well if the flats were THAT bad as you say, then I understand. |
|
|
| (351738) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by FarRock on Mon Dec 11 18:44:10 2006, in response to Re: Flat wheel spots on the R46, posted by Railman718 on Mon Dec 11 18:25:57 2006. Why can't you go fast on flats? Everytime I've been on the Low-Vs during museum runs it had flats and it went fast without a problem. |
|
|
| (351746) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by South Brooklyn Railway on Mon Dec 11 18:46:47 2006, in response to Re: Flat wheel spots on the R46, posted by FarRock on Mon Dec 11 18:44:10 2006. That's because they were Spots, not 1" or more FLATS. |
|
|
| (351760) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by Railman718 on Mon Dec 11 19:05:00 2006, in response to Re: Flat wheel spots on the R46, posted by FarRock on Mon Dec 11 18:44:10 2006. Spotted wheels are one thing..I get a train with those from time to time(not to bad though so 240 Yard Barn does keep that in check) while working the 1 Line on the Weekend.. Flatz are something totally different... |
|
|
| (351781) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by SelkirkTMO on Mon Dec 11 19:40:51 2006, in response to Re: Flat wheel spots on the R46, posted by Edwards! on Sat Dec 9 16:07:14 2006. Always got a kick out of Cynthia Berardi's crews with the canned announcement at departure, "Smoking is permitted except in New Jersey, no pipes, cigars or whacky terbacky." :) |
|
|
| (351862) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by Train Dude on Mon Dec 11 21:18:44 2006, in response to Re: Flat wheel spots on the R46, posted by Railman718 on Mon Dec 11 00:52:29 2006. It's highly doubtful unless it was an organized tour from one of the city's vocational schools (of which I've hosted several for students and teachers). |
|
|
| (351874) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by RonInBayside on Mon Dec 11 21:29:42 2006, in response to Re: Flat wheel spots on the R46, posted by Train Dude on Mon Dec 11 21:18:44 2006. You would be in a position to know, obviously.But if you got a sincere request from an interested student, there must be something in the way of information you could mail that person. |
|
|
| (351888) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by Train Dude on Mon Dec 11 21:43:28 2006, in response to Re: Flat wheel spots on the R46, posted by RonInBayside on Mon Dec 11 21:29:42 2006. Remember - loose lips sink ships and this particular young man has the loosest lips I've seen outside of a copy of Hustler magazine. I don't believe that I ever saw a training video that was any good BUT Dave Pirrmann did see the Wheel Truing Machine in Jamaica Shop in operation many years ago and he may still have some pictures on his site. |
|
|
| (351899) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by RonInBayside on Mon Dec 11 21:50:32 2006, in response to Re: Flat wheel spots on the R46, posted by Train Dude on Mon Dec 11 21:43:28 2006. In other words, this is someone you don't want in the shop looking at everything. |
|
|
| (351901) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by Train Dude on Mon Dec 11 21:53:12 2006, in response to Re: Flat wheel spots on the R46, posted by RonInBayside on Mon Dec 11 21:50:32 2006. No but this is one person that if he were afforded the opportunity to visit a maintenance shop, would not be able to keep it to himself. |
|
|
| (351903) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by RonInBayside on Mon Dec 11 21:53:54 2006, in response to Re: Flat wheel spots on the R46, posted by Train Dude on Mon Dec 11 21:53:12 2006. Understood. |
|
|
| (351962) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by Railman718 on Mon Dec 11 23:05:32 2006, in response to Re: Flat wheel spots on the R46, posted by Train Dude on Mon Dec 11 21:53:12 2006. This i agree with as well....Hence the words "Down Low".... Somethings are best not said... |
|
|
| (351965) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by tracksionmotor on Mon Dec 11 23:07:40 2006, in response to Re: Flat wheel spots on the R46, posted by Train Dude on Mon Dec 11 21:43:28 2006. Any picture of Simmons does not do justice to its horizontal profile cutter. Machine design is pre-war (WW2) and attributed to 'winning the war.' Present machine is original with operator input engaging software for proper operation of automatic operations...always better off in full manual. Motion of machine and horizontal profile cutter is under hydraulic motion....a good crew can pass a truck in 45 minutes. |
|
|
| (351984) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by tracksionmotor on Mon Dec 11 23:38:14 2006, in response to Re: Flat wheel spots on the R46, posted by South Brooklyn Railway on Mon Dec 11 18:46:47 2006. A spot is a dot....a flat requires damage of several inches of tread cutting to attain damage of significance to 1/8th" of depth or more per NYCTA standards. A 36" diameter wheel has an approximate circumference of 112" and a to get a flat of 1/8" deep requires a skid 4" in legnth....just don't cite me as a 'nuklear' mathemetician.Wheels stay crispier longer with the use of Crisco. RRCI Peter |
|
|
| (352061) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by Jeff H. on Tue Dec 12 03:24:52 2006, in response to Re: Flat wheel spots on the R46, posted by South Brooklyn Railway on Sun Dec 10 17:54:56 2006. It's actually really uninteresting with the modern drive-throughtruing machines. Now watching the 1924 Niles machine at Branford, that's an experience. |
|
|
| (352097) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by avid reader on Tue Dec 12 07:27:24 2006, in response to Re: Flat wheel spots on the R46, posted by Train Dude on Sat Dec 9 22:32:33 2006. When a wheel is trued, are both wheels on the axle trued, are all wheels on the truck trued at the same time?I've noticed,eyeball measure, that most wheels on a car, and sometimes in a set of two or four cars are about the same thickness. Does this mean the these cars are re-wheeled at the same time? avid |
|
|
| (352136) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by RonInBayside on Tue Dec 12 09:30:42 2006, in response to Re: Flat wheel spots on the R46, posted by Train Dude on Sat Dec 9 22:32:33 2006. So the wheel is literally stamped into the axle.Grumman Corp used a similar process for assembling certain parts in the wingboxes of the F-14. |
|
|
| (352296) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by South Brooklyn Railway on Tue Dec 12 14:52:42 2006, in response to Re: Flat wheel spots on the R46, posted by Train Dude on Mon Dec 11 21:43:28 2006. Oh, well now I really DON'T feel like ever visiting one of these shops if I had a chance. |
|
|
| (352343) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by Steve B-8AVEXP on Tue Dec 12 16:28:39 2006, in response to Re: Flat wheel spots on the R46, posted by SelkirkTMO on Mon Dec 11 19:40:51 2006. Are you sure you never tried saying something like that on a train of R-32s?:) |
|
|
| (352376) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by Railman718 on Tue Dec 12 17:08:30 2006, in response to Re: Flat wheel spots on the R46, posted by South Brooklyn Railway on Tue Dec 12 14:52:42 2006. Why SBR?Beacuse you feel that hes telling the truth? What you do with your time is your business and noboy else's... If you got the chance to do it and mum's the word then mum's the word... I know i would in a second... |
|
|
| (352378) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by South Brooklyn Railway on Tue Dec 12 17:10:17 2006, in response to Re: Flat wheel spots on the R46, posted by Railman718 on Tue Dec 12 17:08:30 2006. If I did go see it, why would I say it here? |
|
|
| (352385) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by Railman718 on Tue Dec 12 17:16:21 2006, in response to Re: Flat wheel spots on the R46, posted by South Brooklyn Railway on Tue Dec 12 17:10:17 2006. Exactly..Your lips do seem loose at times though even i admit that... They have a tour of Coney coming up maybe you can take a look at the machine there if its part of it... |
|
|
| (352386) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by South Brooklyn Railway on Tue Dec 12 17:17:00 2006, in response to Re: Flat wheel spots on the R46, posted by Railman718 on Tue Dec 12 17:16:21 2006. Yea, but not as much as a few months ago.And I might go if I have time. |
|
|
| (352387) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by Railman718 on Tue Dec 12 17:18:36 2006, in response to Re: Flat wheel spots on the R46, posted by South Brooklyn Railway on Tue Dec 12 17:17:00 2006. Well if you can make it enjoy...Seen Coney Island shop plenty of times in Schoolcar.. lol lol |
|
|
| (352389) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by South Brooklyn Railway on Tue Dec 12 17:19:52 2006, in response to Re: Flat wheel spots on the R46, posted by Railman718 on Tue Dec 12 17:18:36 2006. It's cool there. Nothing to foam about. |
|
|
| (352390) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by Edwards! on Tue Dec 12 17:20:05 2006, in response to Re: Flat wheel spots on the R46, posted by Railman718 on Mon Dec 11 23:05:32 2006. Yup! |
|
|
| (352392) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by Railman718 on Tue Dec 12 17:22:04 2006, in response to Re: Flat wheel spots on the R46, posted by South Brooklyn Railway on Tue Dec 12 17:19:52 2006. Heh heh heh tell that to a few others...You have some foamers who would give thier right arm for a tour at Coney Island Shop... Without giving up kiznash for it... |
|
|
| (352393) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by South Brooklyn Railway on Tue Dec 12 17:23:05 2006, in response to Re: Flat wheel spots on the R46, posted by Railman718 on Tue Dec 12 17:22:04 2006. Heh, then those are TRUE foamers. But I mean, yea, Coney Island Shop is BIG. |
|
|
| (352404) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by SelkirkTMO on Tue Dec 12 17:44:20 2006, in response to Re: Flat wheel spots on the R46, posted by Steve B-8AVEXP on Tue Dec 12 16:28:39 2006. Not THAT one ... never thought I could get in trouble for "time and temperature" along with "you are here" and "don't bother running for that train across the platform, it's already leaving" but I did. And today, they've got even LESS of a sense of humor. :(Nope ... learned my lesson way back then. Always volunteer for a train that had no PA. :) |
|
|
| (352527) | |
Re: Flat wheel spots on the R46 |
|
|
Posted by smooth on Tue Dec 12 22:34:11 2006, in response to Re: Flat wheel spots on the R46, posted by SelkirkTMO on Tue Dec 12 17:44:20 2006. To date, most MTA-deprecating announcement I heard was "Thanks for riding MTA: More Trouble Ahead". Got everyone listening to laugh. |
|
|
|
Page 4 of 6 |
||
