RDSO's report no. TFC-77 (January 2002) of the ... - eLocoS

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LIST OF ANNEXURESAnncxurc No. Description Page No.CRB's D.O. No. 200l/CRB/Misd5Daleu tl.9.200 I 23JJ !ZJ)SO's leller No. 96rrFC/21 O/Catch SiuingDaled 13.9.2001 24III Summary of stalling cases 25[V Gradient in BSP-KTE seelion 26V -~Jength& location ofwhecl burnt/scabbedrail in 13ilaspur division 27-28VJ Revised Haulage charts 29-32VjJApproach speed versus length of maximumnegotiable stretch 33-40VIII Month-wise cases of wheel burnt/scabbedrail in 13ilaspur division 41-43IX : '-S.E. Rly.'s letter No. 48/4 clat~d 2/7.3.2001 44X Balancing speed and time/distance for 75 kmphopcration for 4850 t load on lcveVtangent track 45XI Comparison ofloads permitted und loads inactual pnicticc on S.B. Railway 46-48
1.0·Introduction:Adequate powering of the freight trains is an issue, which has been of concern to railwaysall along, especially fo-r the graded sections. Though powering of the trains is broaqlybased on the loco load haulage charts, arriving at acceptable loads for a particular sectionis a tight ropewalk between loco haulage capability, operational constraints andinfrastructurallimitations. Whereas under powering will mean low average speeds, stallingof loads resulting in loss of line capacity, slogging of the locos resulting in low reliabilitynnd availability, wheel burns and damage to track calling for premature replacement whileon the other hand, providing adequate cushion on every stretch may call for, far morelocos than used at present and consequently lot more infrastructure requirements by wayof maintenance facilities etc. requiring heavy financial investment. In this scenario,judicious decisions are called for 'keeping both health of costly assets and financialposition of Railways in mind.Though railways have fixed loads, on the basis of past experience and on the basis oftrials cunducted, many times the trailing Icads have been found to be exceeding theprescribed limits. Also sometimes there is wide disparity in 4!,'IC loads for similar class cflocomotives.With above background, a study has been taken up as directed vide CRB's D.O. No.2001/CRB/MISC.lS dated 4.9.2001 (copy enclosed as Annexure no. I ).In this report,concept of loco haulage capabili~1 and factors affecting it, load haulage charts for differenttrack and weather conditions, minimum speed at which a loco should approach a gradientand the maximum length of the gradiel'lt, which a loco can clear with.out stalling, arediscussed. This will help railways to analyse the local conditions realistically and arrive atcorrect trailing loads rationally.I2.0 Incidences of stalling & data collection:To assess the extent of the problem being faced in the field, all zonal railways lVererequested to provide details of stalling cases along with sectional details, loads of trains,types of locos used etc. vide RDSo's letter No.96/TFC/210/Catch Siding dt. 13.9.2001(copy enclosed as Annexure No.n ). ,All railways have responded except E.R. Summaryof stalling cases over various zonal railways are attached as Annexure no. Ill. If totalstalling cases are averaged out on daily basis, it is found that there are about 3.6 cases.per day of freight trains stalling over all Indian Hailways (exclusive of ER).It seems that all cases of actual stallihg may not have been reported - some might havebeen reported under other categories like 'miscellaneous' etc. and some might not havebeen reported or highlighted at all. The actual Incidences may be much higher. Asproblem of stalling of trains seriol,lsly affects operation, a review is called for studyingexisting load tables, actual loads of trains ve,.~us types of locos to be utilized, effect ofcurves, & adverse weather conditions, length of gradients etc. on hauling capacities oflocos afresh.
Page 5 and 6: . ,sma ~HCPZ:i' ~a--i:tzCl
Page 7 and 8: i) Improvement in enginemanship;ii)
Page 9: INDEX:S.NG. Desc'ript~oll Page No.1
Page 13 and 14: Total of 22 cases of freight stalli
Page 15 and 16: gradient of 1 in 37, two triple hea
Page 17 and 18: VI)' Running of 58 Box 'N' rake sho
Page 19 and 20: The "table above shows a substantia
Page 21 and 22: Similarly starting load for WDM2 mu
Page 23 and 24: GRADE 20 30 40 50 60 70 80 STARTLEV
Page 25 and 26: 0.3Coeffecientof Adhesion on Oily R
Page 27 and 28: 6.3.4.2 Length of the Gradient and
Page 29 and 30: 7.2.2 The restricfions for double-h
Page 31 and 32: plDced at Annexure No. VI. New sets
Page 33 and 34: q-~1~~JF.y~r, m- ~r~1.[
Page 35 and 36: I HL Y- . Di"jsion Total Period T f
Page 37 and 38: __ .' __ 0"_ 0.0.••• 0- __
Page 39 and 40: HAULAGE CHARTS FOR DIESEL LOCOS FOR
Page 41 and 42: ~ ___ • _0 ••••---_._ 0
Page 43 and 44: --_.- ._ ..._._ •.... .... .. ..
Page 45 and 46: S.NO.- --- -- --- ---_. --.--.-----
Page 47 and 48: APPROACH SPEED VS LENGTH OF MAXIMUM
Page 49 and 50: APPROACH SPEED VS LENGTH OF MAXIMUM
Page 51 and 52: •• • • # • • ."'"!=..
Page 53 and 54: ,110'~. •.;...~::.. "(.-:-:A~~ ,
Page 55 and 56: f:.~"L /\!. ~~~:~'!::}.~:;?,~_Gl~~l
Page 57 and 58: ;,1,tI I ,IiC;:.:'iJ1_-,- ---------

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