|
Percobaan Newark ini menunjukkan bahwa kinerja pengereman sistem abar Westinghouse adalah yang paling baik:<ref>data below from {{cite book|title=Nineteenth Century Railway Carriages|last1=Ellis|first1=Hamilton|date=1949|publisher=Modern Transport Publishing|location=London|page=59}} - ranked in order of merit ''' after allowing for weight of train''' - italicised systems were not truly continuous</ref> tetapi untuk alasan lain<ref>simplicity of engineering as a technical reason; but there seem to have been strong non-technical reasons to do with Westinghouse's salesmanship</ref> sistem vakum lebih disukai dalam perkeretaapian Inggris.
{| class="wikitable"
! rowspan="2" |Sistem abar ▼! colspan="2" |Berat kereta ▼! colspan="2" |Kelajuan KA
! colspan="2" |Jarak penghentian
! rowspan="2" |Waktu berhenti (s)
! colspan="2" |Perlambatan ▼! rowspan="2" |Keadaan rel ▼|-
▲! rowspan= "2 "| |KeadaanBraking relsystem
!ton panjang
!colspan=2| Train weight with engine
!tonne
▲! colspan= "2 "| |BeratTrain keretaspeed
!mil per jam
!colspan=2| Stopping distance
!km/jam
!rowspan=2| Time to stop<br>(s)
▲! colspan= "2 "| |PerlambatanDeceleration
!m
▲! rowspan= "2 " | Sistem abarRails
!''g''
|-
!long tons!!tonnes
!mph!!km/h
| align="right" |203 ton 4 cwt ▼| align="right" |{{convert|203|LT|4|Lcwt|t|disp=number}}| {{convert|52|mph|km/h|disp=table}} ▼| style="text-align:right;" |84| {{convert|304|yd|m|disp=table}} ▼| style="text-align:right;" |278
| align="right" |19| {{convert|0.099|g0|m/s2|disp=table}} ▼| style="text-align:right;" |0,97
|-
| Vakum Westinghouse automatic▼|Hidraulik Clark
| align="right"| |198203 ton 34 cwt
| align="right"| |{{convert|198203|LT|34|Lcwt|t|disp=number}}
| {{convert|52|mph|km/h|disp=table}}
| style="text-align:right;" |84| {{convert|404304|yd|m|disp=table}}
| stylealign="text-align:right;"| |36919
| align="right" |22,75| {{convert|0.075099|g0|m/s2|disp=table}}
| stylealign="text-align:right;"| |0,74dry
|-
| ''Clark hydraulic''
|Vakum Smith<ref name="Oxford2">A "simple" vacuum brake, with no fail-safe capability, invented by James Young Smith, in the U.S. {{cite book|title=The Oxford Companion to British Railway History|last1=Simmons|first1=Jack|last2=Biddle|first2=Gordon|publisher=Oxford University Press|year=1997|isbn=978-0-19-211697-0|location=Oxford, England|page=42|authorlink1=Jack Simmons (historian)}}</ref> ▼| align="right"| |262198 ton 73 cwt
| align="right"| |{{convert|262198|LT|73|Lcwt|t|disp=number}}
| {{convert|49.552|mph|km/h|disp=table}}
| style="text-align:right;" |79,7| {{convert|483404|yd|m|disp=table}}
| stylealign="text-align:right;"| |44222.75
| align="right" |29| {{convert|0.057075|g0|m/s2|disp=table}}
| stylealign="text-align:right;"| |0,56dry
| align="right" |kering
|-
▲| Vakum Smith vacuum<ref name= "Oxford2"Oxford>A "simple" vacuum brake, with no fail-safe capability, invented by James Young Smith, in the U.S. {{cite book |last1=Simmons|first1=Jack|authorlink1=Jack Simmons (historian)|last2=Biddle|first2=Gordon|title=The Oxford Companion to British Railway History| last1year= Simmons|first1=Jack|last2=Biddle|first2=Gordon1997|publisher=Oxford University Press| yearlocation= 1997Oxford, England|isbn=978-0-19-211697-0 |location=Oxford, England|page=42 |authorlink1=Jack Simmons (historian)}}</ref>
| align="right"| |241262 ton 107 cwt
| align="right"| |{{convert|241262|LT|107|Lcwt|t|disp=number}}
| {{convert|4749.5|mph|km/h|disp=table}}
| style="text-align:right;" |76,4| {{convert|479483|yd|m|disp=table}}
| stylealign="text-align:right;"| |43829
| align="right" |29| {{convert|0.056057|g0|m/s2|disp=table}}
| stylealign="text-align:right;"| |0,55dry
| align="right" |kering
|-
▲| Rantai ''Clark danand Webb chain''
|Hidraulik Barker
| align="right"| |210241 ton 210 cwt
| align="right"| |{{convert|210241|LT|210|Lcwt|t|disp=number}}
| {{convert|5047.755|mph|km/h|disp=table}}
| style="text-align:right;" |81,67| {{convert|516479|yd|m|disp=table}}
| stylealign="text-align:right;"| |47229
| align="right" |32| {{convert|0.056|g0|m/s2|disp=table}}
| stylealign="text-align:right;"| |0,55dry
| align="right" |kering
|-
| Barker's hydraulic
| align="right"| |204210 ton 32 cwt
| align="right"| |{{convert|204210|LT|32|Lcwt|t|disp=number}}
| {{convert|5250.75|mph|km/h|disp=table}}
| style="text-align:right;" |84| {{convert|576516|yd|m|disp=table}}
| stylealign="text-align:right;"| |52732
| align="right" |34,5| {{convert|0.052056|g0|m/s2|disp=table}}
| stylealign="text-align:right;"| |0,51dry
| align="right" |basah
|-
▲| Otomatis Westinghouse vacuum
| align="right"| |186204 ton 3 cwt
| align="right"| |{{convert|186204|LT|3|Lcwt|t|disp=number}}
| {{convert|44.552|mph|km/h|disp=table}}
| style="text-align:right;" |71,6| {{convert|388576|yd|m|disp=table}}
| stylealign="text-align:right;"| |35534.5
| align="right" |27,5| {{convert|0.057052|g0|m/s2|disp=table}}
| stylealign="text-align:right;"| |0,56wet
| align="right" |basah
|-
▲| ''Fay mekanikmechanical''
| align="right"| |197186 ton 73 cwt
| align="right"| |{{convert|197186|LT|73|Lcwt|t|disp=number}}
| {{convert|4944.5|mph|km/h|disp=table}}
| style="text-align:right;" |79,7| {{convert|534388|yd|m|disp=table}}
| stylealign="text-align:right;"| |48827.5
| align="right" |34,5| {{convert|0.051057|g0|m/s2|disp=table}}
| stylealign="text-align:right;"| |0,50wet
|-
| align="right" |basah
▲| Udara Steel & McInnes air
▲| align= "right "| |203197 ton 47 cwt
▲| align= "right "| |{{convert| 203197|LT| 47|Lcwt|t|disp=number }}| {{convert|52|mph|km/h|disp=table}}
| {{convert|49.5|mph|km/h|disp=table}}
▲| style="text-align:right;" |84| {{convert| 304534|yd|m|disp=table}}
▲| align= "right "| |kering34.5
▲| align="right" |19| {{convert|0. 099051|g0|m/s2|disp=table}}
▲| align= "right "| |keringwet
|}
| 