Railway applications - Testing and Simulation for the acceptance of running characteristics of railway vehicles - Running Behaviour and stationary tests

This European Standard defines the process for assessment of the running characteristics of railway vehicles for the European network of standard gauge tracks (nominally 1 435 mm).
In addition to the assessment of the running characteristics of vehicles for acceptance processes, the standard also defines quantities and dependencies that are not directly used for acceptance purposes. This information is for example intended for the validation of simulation models. It can also be used to define operating conditions outside the reference conditions to be used for the approval.
The assessment of running characteristics applies to vehicles which:
are newly developed;
have had relevant design modifications; or
have changes in their operating conditions.
The assessment process is based on specified target test conditions (see 3.1) given in this document.
Experience over many years has demonstrated that vehicles complying with this standard can be operated safely on infrastructure with conditions more severe than the target test conditions, if the current general operating rules are applied. As an example it is generally current practice to restrict cant deficiency in curves below a certain radius. It may be necessary to adapt these operating rules, if a deterioration of the infrastructure conditions is observed. These operating rules are defined on national basis. The procedure to evaluate these operating rules is out of the scope of this standard.
NOTE 1   There are margins included in the specified limit values and the statistical evaluation. They cannot be quantified, but they explain why vehicles can also be operated at full speed and cant deficiency in many cases outside of the target test conditions.
The standard also enables the demonstration of compliance against the target test conditions for the case that their combination is not achievable during tests. It is also possible to carry out the assessment of a vehicle for limited test conditions such as test zones 1 and 2 or reduced speed or reduced cant deficiency. In this case the approval of the vehicle shall be restricted accordingly.
NOTE 2   National regulations sometimes allow the increase or decrease of the values for speed, curve radius and cant deficiency for local operation based on safety considerations taking into account the local characteristics of the infrastructure (track layout, track structure, track geometrical quality and contact conditions). These local characteristics can be different from those included in the assessment for the vehicle acceptance.
NOTE 3   The methods of this standard can also be applied to gather information about the compatibility between the vehicle and infrastructure with conditions more severe than the target test conditions. The results of such investigations can be used to determine safe operating rules for such infrastructure conditions.
Where testing the vehicle demonstrates that the performance of a vehicle complies with the requirements of this standard when operating at maximum speed and maximum cant deficiency under infrastructure conditions that are more severe than the target test conditions, the obtained results are accepted and there is no need to carry out additional tests to fulfil the requirements defined in this standard. This standard addresses four aspects:
1)   Vehicles
The assessment of the running characteristics applies principally to all railway vehicles. The document contains acceptance criteria for all types of vehicles with nominal static vertical wheelset forces up to 225 kN (of the highest loaded wheelset of the vehicle in the assessed load configuration specified in 5.3.2). In addition for freight vehicles with nominal static vertical wheelset forces up to 250 kN the acceptance criteria are defined. The acceptance criteria given in this document apply to vehicles designed to operate on standard gauge tracks.
2)   Infrastructure
In the acceptance process the range of curve radii is (...)

Bahnanwendungen - Versuche und Simulationen für die Zulassung der fahrtechnischen Eigenschaften von Eisenbahnfahrzeugen - Fahrverhalten und stationäre Versuche

Applications ferroviaires - Essais et simulations en vue de l'homologation des caractéristiques dynamiques des véhicules ferroviaires - Comportement dynamique et essais stationnaires

Železniške naprave - Preskušanje in simuliranje voznih karakteristik pri prevzemu železniških vozil - Preskušanje obnašanja med vožnjo in mirovanjem

General Information

Status
Not Published
Current Stage
4060 - Closure of enquiry - Enquiry
Due Date
07-Sep-2017
Completion Date
07-Sep-2017

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SLOVENSKI STANDARD
SIST EN 14363:2016/oprA1:2017
01-september-2017

Železniške naprave - Preskušanje in simuliranje voznih karakteristik pri prevzemu

železniških vozil - Preskušanje obnašanja med vožnjo in mirovanjem
Railway applications - Testing and Simulation for the acceptance of running
characteristics of railway vehicles - Running Behaviour and stationary tests

Bahnanwendungen - Versuche und Simulationen für die Zulassung der fahrtechnischen

Eigenschaften von Eisenbahnfahrzeugen - Fahrverhalten und stationäre Versuche

Applications ferroviaires - Essais en vue de l'homologation du comportement dynamique

des véhicules ferroviaires - Essais en ligne et à poste fixe
Ta slovenski standard je istoveten z: EN 14363:2016/prA1
ICS:
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
SIST EN 14363:2016/oprA1:2017 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 14363:2016/oprA1:2017
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SIST EN 14363:2016/oprA1:2017
DRAFT
EUROPEAN STANDARD
EN 14363:2016
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
June 2017
ICS 45.060.01
English Version
Railway applications - Testing and Simulation for the
acceptance of running characteristics of railway vehicles -
Running Behaviour and stationary tests

Applications ferroviaires - Essais et simulations en vue Bahnanwendungen - Versuche und Simulationen für

de l'homologation des caractéristiques dynamiques des die Zulassung der fahrtechnischen Eigenschaften von

véhicules ferroviaires - Comportement dynamique et Eisenbahnfahrzeugen - Fahrverhalten und stationäre

essais stationnaires Versuche

This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 256.

This draft amendment A1, if approved, will modify the European Standard EN 14363:2016. If this draft becomes an amendment,

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of

this amendment into the relevant national standard without any alteration.

This draft amendment was established by CEN in three official versions (English, French, German). A version in any other

language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC

Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14363:2016/prA1:2017 E

worldwide for CEN national Members.
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SIST EN 14363:2016/oprA1:2017
EN 14363:2016/prA1:2017 (E)
Contents Page

European foreword ....................................................................................................................................................... 4

1 Modification to the Introduction ............................................................................................................... 5

2 Modifications in the whole document ..................................................................................................... 5

3 Modifications to Clause 3.............................................................................................................................. 6

3.1 Modification to 3.11 ....................................................................................................................................... 6

3.2 Modification to 3.12 ....................................................................................................................................... 6

3.3 Modification to 3.13 ....................................................................................................................................... 6

4 Modification to Clause 5................................................................................................................................ 7

4.1 Modification to 5.3.1 ...................................................................................................................................... 7

4.2 Modification to 5.3.2, Note 1........................................................................................................................ 7

4.3 Modification to 5.3.2, last dash ................................................................................................................... 7

4.4 Modification to 5.3.3 ...................................................................................................................................... 7

4.5 Modification to 5.5 .......................................................................................................................................... 7

5 Modification to Clause 6................................................................................................................................ 7

5.1 Modification to 6.1.1 – Method 3, 1 paragraph................................................................................... 7

5.2 Modification to 6.1.1, Note 5........................................................................................................................ 7

5.3 Modification to 6.1.5.1.4, 3 paragraph .................................................................................................. 8

paragraph ................................................................................................. 8

5.4 Modification to 6.1.5.1.5, 2

5.5 Modification to 6.1.5.1.8 ............................................................................................................................... 8

6 Modifications to Clause 7.............................................................................................................................. 8

6.1 Modification to 7.1 .......................................................................................................................................... 8

6.2 Modification to 7.2.1 ...................................................................................................................................... 8

6.3 Modification to 7.2.2, Table 1...................................................................................................................... 8

6.4 Modifications to 7.3.1 .................................................................................................................................... 8

6.4.1 Table 2, Column Test zone 4 ........................................................................................................................ 8

6.4.2 Table 2, Footnote f .......................................................................................................................................... 9

6.5 Modification to 7.4, Table 3 ......................................................................................................................... 9

6.6 Modifications to 7.5.1, Table 4 ................................................................................................................... 9

6.7 Modifications to 7.5.1, Note 3...................................................................................................................... 9

6.8 Modification to 7.6.3.1, Table 5 (layout) ................................................................................................. 9

6.9 Modification to 7.6.3.2.1 ............................................................................................................................... 9

6.10 Modification to 7.6.3.2.5, Headline ........................................................................................................... 9

6.11 Modifications to 7.6.3.2.6 ............................................................................................................................. 9

6.12 Modification to 7.6.3.2.6, Note 1 ............................................................................................................. 10

6.13 Modification to 7.6.3.2.7, 1 paragraph ............................................................................................... 10

7 Modifications to Annex A ........................................................................................................................... 10

7.1 Modification to Figure A.1 ......................................................................................................................... 10

7.2 Modification to A.3 ....................................................................................................................................... 10

7.3 Modification to A.3, 4 paragraph ......................................................................................................... 10

7.4 Modification to A.3, Note below Figure A.4 ......................................................................................... 10

7.5 Modification to A.7, first paragraph ...................................................................................................... 11

7.6 Modification to A.8.2, 4 paragraph ...................................................................................................... 11

7.7 Modification to A.8.2, last paragraph .................................................................................................... 11

7.8 Modifications to A.8.4 ................................................................................................................................. 11

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SIST EN 14363:2016/oprA1:2017
EN 14363:2016/prA1:2017 (E)

7.9 Modification to A.9.2, 4 paragraph ...................................................................................................... 11

7.10 Modification A.9.2, last paragraph ......................................................................................................... 12

7.11 Modification to A.9.4.2 ................................................................................................................................ 12

7.12 Modification to A.9.4.4, 3 line from the end ..................................................................................... 12

8 Modification to Annex D ............................................................................................................................. 12

8.1 Modification to D.2.5.4, 1 formula ........................................................................................................ 12

8.2 Modification to D.2.4.5, Note .................................................................................................................... 12

9 Modification to Annex E.............................................................................................................................. 13

9.1 Modification to E.2, Table E.1 ................................................................................................................... 13

10 Modification to Figure I.1 (3 line, left column) .............................................................................. 13

11 Modification to Annex M ............................................................................................................................ 13

11.1 Modification to Annex M.3, b) .................................................................................................................. 13

11.2 Modification to Annex M.3, Table M.2 ................................................................................................... 13

12 Modification to Annex Q.2 ......................................................................................................................... 13

13 Modification to Annex R ............................................................................................................................. 13

13.1 Modification to R.1.1, 1 paragraph ....................................................................................................... 13

13.2 Modification to R.2, dashes ....................................................................................................................... 13

13.3 Modification to R.5 ....................................................................................................................................... 13

13.4 Modification to R.4., 3 paragraph ......................................................................................................... 14

13.5 Modifications to R.5 (x' and y not bold) ................................................................................................ 14

13.6 Modifications to R.6 (p Italic) ................................................................................................................... 14

13.7 Modification to R.8.1, second dash ......................................................................................................... 15

14 Modification to Annex S .............................................................................................................................. 15

14.1 Modification to S.2 ........................................................................................................................................ 15

14.2 Modification to S.4, second last line ....................................................................................................... 15

15 Modification to Annex T ............................................................................................................................. 15

th st

15.1 Modification to Table T.1, 9 line, 1 and last column.................................................................... 15

15.2 Modifications to T.3.3.4, Figure T.2 ........................................................................................................ 16

15.3 Modifications to T.3.3.4, Figure T.3 ........................................................................................................ 16

15.4 Modification to T.7, behind Figure T.11 ............................................................................................... 16

16 Modification in Annex U ............................................................................................................................. 16

16.1 Modification to U.1, first list, second dash ........................................................................................... 16

16.2 Modifications in U.1 ..................................................................................................................................... 16

16.3 Modification to U.2 ....................................................................................................................................... 17

16.4 Modification to U.3.2 .................................................................................................................................... 17

16.5 Modification to U.4 ....................................................................................................................................... 18

17 Modification to Anne V, Table V.1 ........................................................................................................... 18

18 Addition of a new informative Annex X ................................................................................................ 18

19 Modification to Annex ZA ........................................................................................................................... 21

20 Modification to the Bibliography ............................................................................................................ 25

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SIST EN 14363:2016/oprA1:2017
EN 14363:2016/prA1:2017 (E)
European foreword

This document (EN 14363:2016/prA1:2017) has been prepared by Technical Committee CEN/TC 256

“Railway applications”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association, and supports essential requirements of EU Directive(s).

For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this

document.
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SIST EN 14363:2016/oprA1:2017
EN 14363:2016/prA1:2017 (E)
1 Modification to the Introduction
Replace
“vehicles with established and standardised running gear”
with:
“vehicles with established or standardised running gear”.
2 Modifications in the whole document
Change "Q " to "Q " (Note: Do not modify "ΔQ "!):
0 F0
nd rd
— 6.1.3, 2 paragraph, 3 dash;
— 6.1.3, 5 4 paragraph, formulae for a, b, and n;
— 6.1.3, end of 4 paragraph;
— 6.1.3, 5 paragraph;
nd st
— 6.1.5.2.2.3, 2 paragraph, 1 dash;
nd nd
— 6.1.5.2.2.3, 2 paragraph, 2 dash;
— 6.1.5.3.4, 2 paragraph in formula and explanation (3 times);
— 6.1.5.3.4, 3 paragraph in formula;
— 7.5.1, Table 4, Line “Max. vertical wheel force” last column (7 times);
— A.3, Figure A.4, (5 times);
— A.3, Key of Figure A.4;
— A.3, Note;
— A.8.4, 2 paragraph formula (3 times);
— A.8.4, 2 paragraph explanation of formula (2 times);
rd st
— A.8.4, 3 paragraph, 1 formula;
— A.8.4, Figure A.10a (6 times) and Figure A.10b (6 times);
— A.9.3, 5 paragraph, formula (3 times);
— A.9.3, 5 paragraph, explanation of formula (2 times);
— A.9.3, 6 paragraph, formula (3 times);
— A.9.3, 7 paragraph, formula;
— A.9.4.2, 11 paragraph formulae (4 times in each formula for bogie I and II);
---------------------- Page: 7 ----------------------
SIST EN 14363:2016/oprA1:2017
EN 14363:2016/prA1:2017 (E)
— A.9.4.3, 4 paragraph, formula (3 times);
— A.9.4.3, 5 paragraph, explanation of formula (2 times);
— A.9.4.3, 6 paragraph, formula (3 times);
th st
— A.9.4.3, 7 paragraph, 1 formula (2 times);
— A.9.4.3, 9 paragraph, formulae (4 times in each formula for bogie I and II);
— A9.4.4, 1 paragraph, formula;
— A9.4.4, 1 paragraph, explanation of formula (2 times);

— T3.3.4, Table T.2, Line “Quasi-static vertical wheel force”, last column (2 times);

— T3.3.4, Table T.2, Line “Vertical wheel force, maximum”, last column (2 times);

— U.1 Table U.1, footnote k, in formula and explanation (2 times);
— V, Table V.1, 2 page, left column;
— V, Table V.1, 2 page, right column.
3 Modifications to Clause 3
3.1 Modification to 3.11
Replace:

"is equal to the tangent of the cone angle tan γ of a wheelset with coned wheels whose lateral

movement has the same kinematic wavelength as the given wheelset and is the relevant parameter of

contact geometry on straight track and on large radius curves"
with:

"tangent of the cone angle of a wheelset with coned wheels whose lateral movement has the same

kinematic wavelength as the given wheelset".
3.2 Modification to 3.12
Replace:

"ratio between curve radius R negotiable without longitudinal creepage and the actual curve radius R

of the track section and it describes the radial steering capability of a free wheelset in a track section as

the relevant parameter of contact geometry on small and very small radius curves"

with:

"ratio between curve radius R negotiable without longitudinal creepage and the actual curve radius R

of the track section and it describes the radial steering capability of a free wheelset in a track section".

3.3 Modification to 3.13
Replace:

"given by the combinations of speed and cant deficiency for which the vehicle is intended to be

operated"
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SIST EN 14363:2016/oprA1:2017
EN 14363:2016/prA1:2017 (E)
with:

"the combinations of speed and cant deficiency for which the vehicle is intended to be operated".

4 Modification to Clause 5
4.1 Modification to 5.3.1
Replace

"In this context, evidence (test reports, technical specifications, letter declaring conformity, etc.) shall be

provided to show whether the values of the most important vehicle parameters for running behaviour

are within the construction and maintenance tolerances."
with:.

"In this context, evidence (for example technical specifications, letter declaring conformity and/or test

reports) shall be provided to show whether the values of the most important vehicle parameters for

running behaviour are within the construction and maintenance tolerances.".
4.2 Modification to 5.3.2, Note 1
Replace

"Vehicles of long distance and high speed trains are considered, if necessary, for the loading conditions

with and/or without seat reservation in certain test conditions."
with:.

"Vehicles of long distance and high speed trains are considered, if necessary, using the loading

conditions with and/or without seat reservation in certain test conditions.".
4.3 Modification to 5.3.2, last dash
Replace "load conditions" with "loading conditions".
4.4 Modification to 5.3.3
Adapt Note to status of EN 15654-2 (prEN, FprEN or EN).
4.5 Modification to 5.5

Replace "weather conditions" with "description of weather conditions during test runs".

5 Modification to Clause 6
5.1 Modification to 6.1.1 – Method 3, 1 paragraph
Replace:

"It measures separately the change in vertical wheel force ΔQ/Q when the vehicle is subjected to

twisted track. The assessment criterion is the X-factor together with the wheel unloading ΔQ/Q."

with:.

"It measures separately the relative wheel unloading ΔQ/Q when the vehicle is subjected to twisted

track. The assessment criterion is the X-factor together with the relative wheel unloading ΔQ/Q.".

5.2 Modification to 6.1.1, Note 5
Delete the link “http://www.uic.org“.
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SIST EN 14363:2016/oprA1:2017
EN 14363:2016/prA1:2017 (E)
5.3 Modification to 6.1.5.1.4, 3 paragraph
Replace:

"If the actual twist of the test track is smaller than the test twist specified in 6.1.5.1.2, the missing twist

shall be included within the vehicle, e.g. by including shims in the springs in an appropriate way.

Justification of the method of shimming that is used shall be documented. This shall demonstrate that

the effect of the shimming achieves the same effects as would be achieved if the required twist was

applied at the track level. A.7 contains suggestions for calculating the thickness of the shims depending

on their location."
with:

"If the installed twist of the test track is smaller than the test twist specified in 6.1.5.1.2, the missing

twist shall be included within the vehicle, for example by including shims in the springs (and anti-roll

bar seats) in an appropriate way. Justification of the used method of shimming shall be documented.

This shall demonstrate that the effect of the shimming achieves the same effect as the application of the

required twist at track level. A.7 contains suggestions for calculating the thickness of the shims

depending on their location.".
5.4 Modification to 6.1.5.1.5, 2 paragraph
Delete: "; wavelengths below 2 m shall be excluded from the signal".
5.5 Modification to 6.1.5.1.8
Turn last paragraph into the last bullet point of the list above.
6 Modifications to Clause 7
6.1 Modification to 7.1
Replace:

"The initial assessment of the dynamic performance of a vehicle type shall generally be verified by on-

track tests"
with:

"The initial assessment of the dynamic performance of a vehicle type shall generally be performed

based on on-track tests".
6.2 Modification to 7.2.1
Replace:

"…with measured accelerations at the bogie frame and accelerations in the vehicle body."

with:

"…with measured accelerations at the running gear and accelerations in the vehicle body.".

6.3 Modification to 7.2.2, Table 1
Start new page at line "Maximum admissible speed of the vehicle V ".
adm
6.4 Modifications to 7.3.1
6.4.1 Table 2, Column Test zone 4
Line: mean value of curve radius:
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SIST EN 14363:2016/oprA1:2017
EN 14363:2016/prA1:2017 (E)
Tolerance to be described with comma: “(+50 m, -20 m)”.
6.4.2 Table 2, Footnote f

Replace "for zone 3: (R = 550 m, I = 1,1 · I )" with "for zone 3: (R = 500 m, I = 1,1 · I )".

adm adm
Replace "for test zone 1: V = V , I = 0" with "for test zone 1: V = 1,1 · V ".
adm adm
6.5 Modification to 7.4, Table 3
In block "Forces at bogie" delete:
"suspension" from "wheelset j right/left suspension".
6.6 Modifications to 7.5.1, Table 4

Replace “Derailment coefficient” with “Quotient of lateral and vertical wheel force”.

Replace all “(D)” with “D”.
6.7 Modifications to 7.5.1, Note 3
Replace:
“ΣY ”
j,max
with:
"ΣY ”
j,max,lim
Replace:

“It is possible to use extended calculation methods which take this fact into consideration.”

with:

“It is permissible to use extended calculation methods which take this fact into consideration.”.

6.8 Modification to 7.6.3.1, Table 5 (layout)
In Table 5, the width of the inner lines have to be harmonized.
6.9 Modification to 7.6.3.2.1
Start a new page with the last line on page 63 “Test zone Straight track:”.
6.10 Modification to 7.6.3.2.5, Headline
Replace:
"Recalculated quotient of lateral and vertical wheel force coefficient (Y/Q) "
a,max,rec
with:
"Recalculated quotient of lateral and vertical wheel force".
6.11 Modifications to 7.6.3.2.6
Replace:

“The evaluation of the estimated value for the guiding force is performed in two steps”

with:

“The evaluation of the estimated value for the quasi-static guiding force is performed in two steps”.

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SIST EN 14363:2016/oprA1:2017
EN 14363:2016/prA1:2017 (E)
Replace:
“If one dimensional or two dimensional evaluation is applied,”
with:
“If the two dimensional evaluation is applied,”.
6.12 Modification to 7.6.3.2.6, Note 1
Replace "Y/Q " by "(Y/Q) ".
i i
6.13 Modification to 7.6.3.2.7, 1 paragraph
Replace:

“For test conditions with I > 165 mm a special analysis shall be performed in order to take into

adm

account a possible asymmetry. Therefore the overturning parameter κ defined in 7.5.2 shall be

evaluated.”
with:

“For test conditions with I > 165 mm a special analysis to evaluate the overturning parameter κ

adm

defined in 7.5.2 shall be performed in order to take into account a possible asymmetry.”.

7 Modifications to Annex A
7.1 Modification to Figure A.1

Add key "1" in drawing for the resulting line (oriented upper left to lower right) and add in key:

“1 – direction of resulting force”.
7.2 Modification to A.3
Replace in whole A.3 (text, formulae and Figure A.3) “β“ by ”γ“.
7.3 Modification to A.3, 4 paragraph
Replace:

"tan ρ represents the relationship between lateral creep force and normal force which is termed friction

coefficient τ and depends on the angle of attack (lateral creepage) and vertical wheel force."

with:

"tan ρ represents the relationship between lateral creep force and normal force which is termed friction

coefficient τ and depends on the angle of attack (lateral creepage) and normal force (roughly vertical

wheel force).".
7.4 Modification to A.3, Note below Figure A.4
Replace:

"If the actual mean vertical wheel force on the inner rail during the test differs from Q it is permitted to

use this value in the above diagram."
with:
it is permitted to

"If the actual mean vertical wheel force on the inner rail during the test differs from Q0

use this deviating value in the above diagram.".
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SIST EN 14363:2016/oprA1:2017
EN 14363:2016/prA1:2017 (E)
7.5 Modification to A.7, first paragraph
Replace:

“Test method 1 (twisted test track) uses an installed track twist. The vehicle test twist condition which

is greater than the installed twist shall be installed within the vehicle by packing with shims. In general

this is achieved by shims under the springs and anti-roll bar seats where applicable.

Additional vertical heights required to simulate the additional twist in the vehicle are calculated as:”

with:

"The missing twist compared to the installed track twist as described in 6.1.5.1.4 is generally achieved

by shims. The additional vertical heights required to simulate the additional twist in the vehicle are

calculated as:".
7.6 Modification to A.8.2, 4 paragraph
Replace:

"All measurements shall reflect the contact points of wheel and rail. If it is not possible to measure

directly at the contact points it is necessary to convert the measured values (displacements and forces)

to equivalent
...

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