South African type MR tender

Type MR on SAR Class 12R, 1979

| Type and origin

Locomotive| Class 12, Class 12A, Class 12B, Class 14A, Class 14B, Class 15, Class 15A, Class 16, Class 16A, Class 16B, Class 16C
Designer| South African Railways
Builder| South African Railways
In service| c. 1930
Rebuilt from| Type MP1
| Specifications

Configuration| 2-axle bogies
Gauge| 3 ft 6 in (1,067 mm) Cape gauge
Length| 25 ft 10+3⁄8 in (7,884 mm) no. 1494-1519, 1746-1760
25 ft 10+3⁄4 in (7,893 mm) all others
Wheel dia.| 34 in (864 mm)
Wheelbase| 16 ft 9 in (5,105 mm)
• Bogie| 4 ft 7 in (1,397 mm)
Axle load| 13 LT 14 cwt (13,920 kg)
• Front bogie| 24 LT 19 cwt (25,350 kg)
• Rear bogie| 27 LT 8 cwt (27,840 kg)
Weight empty| 48,864 lb (22,164 kg)
Weight w/o| 52 LT 7 cwt (53,190 kg)
Fuel type| Coal
Fuel cap.| 10 LT (10.2 t)
Water cap.| 4,600 imp gal (20,900 l)
Stoking| Manual
Couplers| Drawbar & AAR knuckle
| Career

Operators| South African Railways
Numbers| SAR 790-841, 851-852, 1494-1550, 1561-1595, 1746-1760, 1781-1828, 1839-1878, 1901-1921, 1931-1970, 2011-2025, 2080-2100, 2103-2138

Main article: South African steam locomotive tenders

The South African type MR tender was a steam locomotive tender.

Type MR tenders were rebuilt from Type MP1 tenders, which had entered service between 1912 and 1920. The rebuilding resulted in a tender with a larger water tank, but the same coal capacity.[1][2]

## Contents

* 1 Origin
* 2 Rebuilding
* 3 Characteristics
* 4 Classification letters
* 5 Illustration
* 6 References

## Origin[edit]

The Type MP1 tender first entered service in 1912, as tenders to the Class 12 4-8-2 Mountain type steam locomotives which were acquired by the South African Railways (SAR) in that year. They were built by North British Locomotive Company and Beyer, Peacock and Company.[1][2][3]

More Type MP1 tenders, from which the Type MR would later be rebuilt, entered service from 1913 to 1920 as tenders to the Classes 12A, 12B, 14A, 14B, 15, 15A, 16, 16A, 16B and 16C. These locomotives and tenders were built by Baldwin Locomotive Works, Beyer, Peacock and Company, Henschel and Son, J.A. Maffei and North British Locomotive Company.[1][2]

Other locomotives which were delivered new with Type MP1 tenders were the Classes 14, MC1, MH and MJ.[1][2]

## Rebuilding[edit]

During the 1930s, several of the Type MP1 tenders were rebuilt by the SAR by mounting a completely new upper structure with a larger water tank on the existing underframe. The modification was done to drawings approved by Chief Mechanical Engineer (CME) A.G. Watson in 1929 in respect of Type MP1 tenders of the Classes 12, 12A, 12B, 14, 14A, 14B, 15, 15A, 16, 16A, 16B and 16C. These rebuilt tenders had a more modern appearance, with flush sides all the way to the top of the self-trimming coal bunker.[1][2][4]

The program to rebuild several older tender types with new upper structures was begun by Col F.R. Collins DSO, who approved several of the detailed drawings for the work during his term in office as CME of the SAR from 1922 to 1929.[5]

## Characteristics[edit]

The rebuilt Type MR tender had the same 10 long tons (10.2 tonnes) coal capacity as the Type MP1, but its water capacity had been increased from 4,250 to 4,600 imperial gallons (19,300 to 20,900 litres). It had a maximum axle load of 13 long tons 14 hundredweight (13,920 kilograms).[1][2][4]

## Classification letters[edit]

Since many tender types are interchangeable between different locomotive classes and types, a tender classification system was adopted by the SAR. The first letter of the tender type indicates the classes of engines to which it could be coupled. The "M_" tenders could be used with the locomotive classes as shown, although engine drawbars and intermediate emergency chains had to be replaced or adjusted to suit the target locomotive in some cases.[2]

* Class 12, Class 12A and Class 12B.
* Class 14, Class 14A and Class 14B.
* Class 15 and Class 15A.
* Class 16, Class 16A, Class 16B and Class 16C.
* Class 19, Class 19A, Class 19B, Class 19C and Class 19D.
* Class 20.
* Class 24.
* Class MC1, Class MH and Class MJ.
* Class S2.

The second letter indicates the tender's water capacity. The "_R" tenders had a capacity of 4,600 imperial gallons (20,900 litres; 5,520 US gallons).[2]

## Illustration[edit]

* Type MR on SAR Class 14R, 1978

## References[edit]

1. ^ a b c d e f South African Railways & Harbours/Suid Afrikaanse Spoorweë en Hawens (15 Aug 1941). Locomotive Diagram Book/Lokomotiefdiagramboek, 3'6" Gauge/Spoorwydte. SAR/SAS Mechanical Department/Werktuigkundige Dept. Drawing Office/Tekenkantoor, Pretoria. p. 42.
2. ^ a b c d e f g h South African Railways & Harbours/Suid Afrikaanse Spoorweë en Hawens (15 Aug 1941). Locomotive Diagram Book/Lokomotiefdiagramboek, 2'0" & 3'6" Gauge/Spoorwydte, Steam Locomotives/Stoomlokomotiewe. SAR/SAS Mechanical Department/Werktuigkundige Dept. Drawing Office/Tekenkantoor, Pretoria. pp. 6a-7a, 42.
3. ^ Holland, D. F. (1972). Steam Locomotives of the South African Railways. Vol. 2: 1910-1955 (1st ed.). Newton Abbott, England: David & Charles. pp. 20–21, 24–27, 30, 34, 38–41. ISBN 978-0-7153-5427-8.
4. ^ a b SAR&H Mechanical Department. Alteration of Tender to Self Trimming Coal Bunker Type - Class 12, 12A, 12B, 14, 14A, 14B, 15, 15A, 16, 16A, 16B, 16C. SAR Mechanical Department Drawing Office, Drawing L-6780/1, 7 April 1929.
5. ^ SAR Mechanical Department. New Tender Tank - Class 6B, 6E (XE), 7A, 7B, 7C (ZE). SAR Mechanical Department Drawing Office, Drawing L-5618, 1925.

* v
* t
* e

South African steam locomotive tenders

Cape gauge|

* Type CL
* Type CZ

* Type ET
* Type ET1
* Type EW
* Type EW1
* Type EW2

* Type FT

* Type GT

* Type HT

* Type JT
* Type JT1
* Type JV

* Type KT

* Type LP

* Type MP
* Type MP1
* Type MR
* Type MS
* Type MT
* Type MT1
* Type MT2
* Type MX
* Type MY
* Type MY1

* Type SH
* Type SK

* Type TJ
* Type TL
* Type TM

* Type WE
* Type WG

* Type X-17
* Type X-20
* Type XC
* Type XC1
* Type XD
* Type XE
* Type XE1
* Type XF
* Type XF1
* Type XF2
* Type XJ
* Type XM
* Type XM1
* Type XM2
* Type XM3
* Type XM4
* Type XP1
* Type XS

* Type YB
* Type YC
* Type YE
* Type YE1

* Type ZA
* Type ZB
* Type ZC
* Type ZE

* List of South African locomotive classes
* South African locomotive history

* v
* t
* e

Locomotives of South Africa

Steam|

| 7' ¼" gauge|

* East London 0-4-0VB

* Table Bay 0-4-0ST
* Table Bay 0-4-0T
* Table Bay 0-4-0WT

|

Standard gauge|

* Cape 0-4-0T Blackie
* Cape 0-4-2
* Cape 2-4-0T

* CGR 0-4-0ST Aid

* Natal 0-4-0ST Durban
* Natal 0-4-0WT Natal
* Natal 4-4-0T Perseverance

Cape gauge
Tank engines|

* CGR 0-4-0ST 1873
* CGR 0-4-0ST 1874
* CGR 0-4-0ST 1881
* CGR 0-4-0ST 1881 Coffee Pot
* CGR 0-6-0ST
* CGR 0-6-0T
* CGR 2-6-0ST 1900
* CGR 2-6-0ST 1902
* CGR 1st Class 0-4-0ST 1875
* CGR 1st Class 0-4-0ST 1876
* CGR 1st Class 2-6-0ST
* CGR 1st Class 4-4-0T
* CGR 2nd Class 4-4-0T
* CGR 3rd Class 2-6-0T
* CGR Railmotor

* CSAR Class C
* CSAR Class E
* CSAR Rack 4-6-4RT
* CSAR Railmotor

* Durban's Congella
* Durban's Edward Innes
* Durban's John Milne
* Durban's Sir Albert

* Port Elizabeth 0-4-0ST

* Kowie Railway 0-6-0T
* Kowie Railway 4-4-0T

* Metropolitan & Suburban 4-6-2T

* NGR 2-6-0T Durban & Pietermaritzburg
* NGR Class I 2-6-2T
* NGR Class K 0-4-0ST
* NGR Class K 0-6-0ST
* NGR Class K 2-6-0T

* NZASM 10 Tonner
* NZASM 13 Tonner
* NZASM 14 Tonner
* NZASM 18 Tonner
* NZASM 19 Tonner
* NZASM 32 Tonner
* NZASM 40 Tonner

* PPR 26 Tonner
* PPR 35 Tonner Portuguese

* SAR Class A
* SAR Class B
* SAR Class C
* SAR Class C1
* SAR Class C2
* SAR Class D
* SAR Class E
* SAR Class F
* SAR Class G
* SAR Class H
* SAR Class H1
* SAR Class H2
* SAR Class J
* SAR Class K
* SAR Railmotor
* SAR Dock 0-4-0ST
* SAR Dock 0-4-0T

* SWA 2-8-0T

Cape gauge
Tender engines|

* CGR 1st Class 2-6-0 1876 BP
* CGR 1st Class 2-6-0 1876 Kitson
* CGR 1st Class 2-6-0 1879
* CGR 1st Class 2-6-0 1891
* CGR 1st Class 4-4-0
* CGR 1st Class 4-4-0TT
* CGR 2nd Class 2-6-2TT
* CGR 3rd Class 4-4-0 1883
* CGR 3rd Class 4-4-0 1884
* CGR 3rd Class 4-4-0 1889
* CGR 3rd Class 4-4-0 1898
* CGR 3rd Class 4-4-0 1901
* CGR 3rd Class 4-4-0 1903
* CGR 4th Class 4-4-2
* CGR 4th Class 4-6-0TT 1880
* CGR 4th Class 4-6-0TT 1882
* CGR 4th Class 4-6-0TT 1882 Joy
* CGR 4th Class 4-6-0TT 1884
* CGR 5th Class 4-6-0 1890
* CGR 5th Class 4-6-0 1891

* NGR Havelock
* NGR Class I

* SAR Class Exp 1
* SAR Class Exp 2
* SAR Class Exp 3
* SAR Class Exp 4
* SAR Class Exp 5
* SAR Class Exp 6
* SAR Class S
* SAR Class S1
* SAR Class S2
* SAR Class 1
* SAR Class 1A
* SAR Class 1B
* SAR Class 2
* SAR Class 2C
* SAR Class 3
* SAR Class 3A
* SAR Class 3B
* SAR Class 4
* SAR Class 4A
* SAR Class 5
* SAR Class 5A
* SAR Class 5B
* SAR Class 6
* SAR Class 6A
* SAR Class 6B
* SAR Class 6C
* SAR Class 6D
* SAR Class 6E
* SAR Class 6F
* SAR Class 6G
* SAR Class 6H
* SAR Class 6J
* SAR Class 6K
* SAR Class 6L
* SAR Class 6Y
* SAR Class 6Z
* SAR Class 7
* SAR Class 7A
* SAR Class 7B
* SAR Class 7C
* SAR Class 7D
* SAR Class 7E
* SAR Class 7F
* SAR Class 8
* SAR Class 8A
* SAR Class 8B
* SAR Class 8C
* SAR Class 8D
* SAR Class 8E
* SAR Class 8F
* SAR Class 8R
* SAR Class 8X
* SAR Class 8Y
* SAR Class 8Z
* SAR Class 9
* SAR Class 10
* SAR Class 10A
* SAR Class 10B
* SAR Class 10C
* SAR Class 10D
* SAR Class 11
* SAR Class 12
* SAR Class 12A
* SAR Class 12B
* SAR Class 13
* SAR Class 14
* SAR Class 14A
* SAR Class 14B
* SAR Class 14C 1st
* SAR Class 14C 2nd
* SAR Class 14C 3rd
* SAR Class 14C 4th
* SAR Class 15
* SAR Class 15A
* SAR Class 15B
* SAR Class 15C
* SAR Class 15CA
* SAR Class 15E
* SAR Class 15F
* SAR Class 16
* SAR Class 16A
* SAR Class 16B
* SAR Class 16C
* SAR Class 16D
* SAR Class 16DA 1928
* SAR Class 16DA 1930
* SAR Class 16E
* SAR Class 17
* SAR Class 18
* SAR Class 19
* SAR Class 19A
* SAR Class 19B
* SAR Class 19C
* SAR Class 19D
* SAR Class 20
* SAR Class 21
* SAR Class 23
* SAR Class 24
* SAR Class 25
* SAR Class 25NC
* SAR Class 26
* SAR Katanga

* SWA 2-8-0

Cape gauge
Articulated
engines|

* CGR Fairlie
* CGR Kitson-Meyer

* SAR Class FC
* SAR Class FD
* SAR Class GA
* SAR Class GB
* SAR Class GC
* SAR Class GCA
* SAR Class GD
* SAR Class GDA
* SAR Class GE
* SAR Class GEA
* SAR Class GF
* SAR Class GG
* SAR Class GH
* SAR Class GK
* SAR Class GL
* SAR Class GM
* SAR Class GMA
* SAR Class GO
* SAR Class HF
* SAR Class KM
* SAR Class MA
* SAR Class MB
* SAR Class MC
* SAR Class MC1
* SAR Class MD
* SAR Class ME
* SAR Class MF
* SAR Class MG
* SAR Class MH
* SAR Class MJ
* SAR Class MJ1
* SAR Class U

2' 6" gauge|

* Cape Copper John King & Miner
* Cape Copper Britannia
* Cape Copper Caledonia
* Cape Copper Clara
* Cape Copper Condenser
* Cape Copper Scotia

* Namaqua Copper Pioneer

* Walvis Bay 2-4-2T Hope

2' & 600mm
gauges|

* ACR Class NG-G16A

* CGR NG 0-4-0T
* CGR NG 0-6-0T
* CGR NG 4-6-2T
* CGR Type A 2-6-4T
* CGR Type C 0-4-0T

* NGR Class N 4-6-2T

* SAR Dutton
* SAR NG 0-4-0T
* SAR Class NG1
* SAR Class NG2
* SAR Class NG3
* SAR Class NG4
* SAR Class NG5
* SAR Class NG6
* SAR Class NG7
* SAR Class NG8
* SAR Class NG9
* SAR Class NG10
* SAR Class NG-G11
* SAR Class NG-G12
* SAR Class NG-G13
* SAR Class NG-G14
* SAR Class NG15
* SAR Class NG-G16

* SWA Class Ha
* SWA Class Hb
* SWA Class Hc
* SWA Class Hd
* SWA Jung
* SWA Zwillinge

Electric|

* Amcoal Class E38

* SAR Class ES
* SAR Class ES1
* SAR Class Exp-AC
* SAR Class 1E
* SAR Class 2E
* SAR Class 3E
* SAR Class 4E
* SAR Class 5E s1
* SAR Class 5E s2
* SAR Class 5E s3
* SAR Class 5E1 s1
* SAR Class 5E1 s2
* SAR Class 5E1 s3
* SAR Class 5E1 s4
* SAR Class 5E1 s5
* SAR Class 6E
* SAR Class 6E1 s1
* SAR Class 6E1 s2
* SAR Class 6E1 s3
* SAR Class 6E1 s4
* SAR Class 6E1 s5
* SAR Class 6E1 s6
* SAR Class 6E1 s7
* SAR Class 6E1 s8
* SAR Class 6E1 s9
* SAR Class 6E1 s10
* SAR Class 6E1 s11
* SAR Class 7E
* SAR Class 7E1
* SAR Class 7E2 s1
* SAR Class 7E2 s2
* SAR Class 7E3 s1
* SAR Class 7E3 s2
* Spoornet Class 7E4
* SAR Class 8E
* SAR Class 9E s1
* SAR Class 9E s2
* SAR Class 10E
* SAR Class 10E1 s1
* Spoornet Class 10E1 s2
* SAR Class 10E2
* SAR Class 11E
* SAR Class 12E
* Spoornet Class 14E
* Spoornet Class 14E1
* TFR Class 15E
* Spoornet Class 16E
* Spoornet Class 17E
* Spoornet Class 18E s1
* TFR Class 18E s2
* TFR Class 19E
* TFR Class 20E
* TFR Class 21E
* TFR Class 22E
* TFR Class 23E

Gas-electric|

* SAR Gas-electric

Diesel|

| Cape gauge
Diesel-electric|

* PRASA Class Afro 4000
* SAR Class DS
* SAR Class DS1
* SAR Class 31-000
* SAR Class 32-000
* SAR Class 32-200
* SAR Class 33-000
* SAR Class 33-200
* SAR Class 33-400
* SAR Class 34-000
* SAR Class 34-200
* SAR Class 34-400
* SAR Class 34-500
* SAR Class 34-600
* SAR Class 34-800
* SAR Class 34-900
* SAR Class 35-000
* SAR Class 35-200
* SAR Class 35-400
* SAR Class 35-600
* TFR Class 35-800
* SAR Class 36-000
* SAR Class 36-200
* SAR Class 37-000
* Spoornet Class 39-000
* TFR Class 39-200
* TFR Class 43-000
* TFR Class 44-000
* TFR Class 45-000

|

2' gauge
Diesel-electric|

* SAR Class 91-000

Cape gauge
Diesel-hydraulic|

* SAR Class 61-000

Cape gauge
Electro-diesel|

* Spoornet Class 38-000

* List of South African locomotive classes
* South African locomotive numbering and classification

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