Class P

A series of 26* 4-6-2 locomotives built in several batches by Kitson and North British. They had 8-wheel bogie tenders.

*20 ordered before WWI. Kitson built and delivered 4 in 1917. 6 more were built in 1918 but were diverted en route, going to India instead. 16 replacements were built after WWI.

These were basically a superheated H class but delivery was delayed due to WWI and the second batch of 6 from Kitson were diverted to India. This batch may not have been numbered as locomotives were normally delivered in kit form and assembled in Malaya. North British then completed the order with 16 in 1919 and 1920. In 1942 the whole class were taken by the Japanese to the Siam-Burma line where two were destroyed. After WWII the 18 survivors were loaned to the RSR and purchased outright in October 1946. Two or three later returned to Malaya during the 1950s, there being some confusion regarding dates and numbers, see note below for explanation.

One of two possible survivors of the FMSR P class, RFT 804 (previously RSR 810, ex-FMSR 190) is preserved by the station at the eastern end of the River Kwae bridge at Kanchanaburi in Thailand. The other was last reported outside a restaurant in the northern suburbs of Bangkok carrying ex-FMSR 187, but is probably RSR 804, ex FMSR 185.

Maker Number Date Original Railway / No MR No. Notes
Kitson 5159 F.M.S.R. 182 521.01 RSR 802
Kitson 5160 F.M.S.R. 183 521.02 RSR 801, sold to MR 521.04 (3/1953-1958)
Kitson 5161 F.M.S.R. 184 521.03 RSR 803, withdrawn 1949
Kitson 5162 F.M.S.R. 185 521.04 RSR 804, preserved 7/1966 as FMSR 187
Kitson 5163 F.M.S.R. 186 Bombay, Baroda & Central Indian Railway 856
Kitson 5164 F.M.S.R. 187 Bombay, Baroda & Central Indian Railway 857
Kitson 5165 F.M.S.R. 188 Bombay, Baroda & Central Indian Railway 858
Kitson 5166 F.M.S.R. 189 Bombay, Baroda & Central Indian Railway 859
Kitson 5167 F.M.S.R. 190 Bombay, Baroda & Central Indian Railway 860
Kitson 5168 F.M.S.R. 191 Bombay, Baroda & Central Indian Railway 861
North British 22505 F.M.S.R. 186 521.05 RSR 805
North British 22506 F.M.S.R. 187 521.06 RSR 807
North British 22507 F.M.S.R. 188 521.07 RSR 809
North British 22508 F.M.S.R. 189 521.08 RSR 816, sold to MR 521.08 (3/1953-1958)
North British 22509 F.M.S.R. 190 521.09 RSR 810, preserved 7/1966 as RFT 804
North British 22510 F.M.S.R. 191 521.10 RSR 817, withdrawn 1951
North British 22511 F.M.S.R. 192 521.11 RSR 811
North British 22512 F.M.S.R. 193 521.12 RSR 812
North British 22513 F.M.S.R. 194 521.13 RSR 806
North British 22514 F.M.S.R. 195 521.14 RSR 813, withdrawn 1949
North British 22515 F.M.S.R. 196 521.15 RSR 808
North British 22516 F.M.S.R. 197 521.16 destroyed in Burma during WWII
North British 22517 F.M.S.R. 198 521.17 destroyed in Burma during WWII
North British 22518 F.M.S.R. 199 521.18 RSR 814
North British 22519 F.M.S.R. 200 521.19 RSR 815
North British 22520 F.M.S.R. 201 521.20 RSR 818

The above data is taken from Ramaer. Len Stanway has sent me some data on renumbering which is slightly different. An RSR 801 was returned to Malaya in 1951 and FMSR numbered it 521.04. It worked as pilot locomotive on the Port Dickson branch until 1958 when it returned to Thailand, becoming RSR 804 until withdrawal for preservation in 1966. Another RSR 801 (may have previously been RSR 804) was purchased by FMSR in 1953 and numbered 521.02, surviving until 1958.

The discrepancies could be caused by exchange of parts between locomotives or inaccurate records.

Leading particulars:
Wheel arrangement: 4-6-2 with 8-wheel bogie tender. Boiler pressure: 160/180 lbs, superheated.
Fire grate: 18.5 sq. feet. Heating surface: 1,000 sq. feet.
Fuel capacity: 315 cu ft. Water capacity: 2,000 gallons.
Max. axle load: 10.5 tons. Fixed wheel-base: 9 ft. 5 in.
Variable particulars:

Introduced

Class Numbers

Cylinders

(2)

Tractive

effort

Loco

weight

 Tender

weight

 Overall

length

1917

P

(521)

182 - 185

521.01 - 521.04

17" x 24"

19,645

49 tons

29t 11c 55 ft. 

1919

P

(521)

186 - 201

521.05 - 521.20

17" x 24"

19,645

49 tons

29t 11c  55 ft. 

 

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