Diesel Electric railmotor (VR)

Diesel Electric Rail Motor (DERM)

RM58 At Newport Workshops

Type and origin
Power type	Diesel engine, Originally Petrol
Designer	St Louis Car Company
Builder	St Louis Car Company (First) Victorian Railways
Build date	1928 - 1931
Total produced	10

Specifications
Gauge	5 ft 3 in (1,600 mm)
Length	58 ft (18 m)
Loco weight	43.07 long tons (43.76 t; 48.24 short tons)
Fuel type	Originally Petrol, converted to Diesel fuel
Fuel capacity	750 litres (200 US gal)
Engine type	220 hp Winton six-cylinder petrol engine (Petrol) 2 x General Motors series 71 twin six-cylinder diesel engines (Diesel)
Generator	General Electric DT 501E2
Traction motors	2 x General Electric GE 273A

Performance figures
Maximum speed	100 kilometres per hour (62 mph)
Power output	220 hp (Petrol), 255 bhp (Diesel)

Career
Operators	Victorian Railways, VLine
Number in class	10
Numbers	55RM - 64RM
First run	1928

RM 63 as restored by DSCR in 2007

RM 55 as a PERM pre 1952

The Diesel Electric Rail Motor (DERM) was a railmotor operated by the Victorian Railways of Australia.

History

Originally built as a Petrol Electric Rail Motor (PERM), they were the longest-lived railmotor on the Victorian Railways, with the first entering service in 1928 and the last being withdrawn in 1991. The first railmotor was built by the St. Louis Car Company and shipped to Australia where the Victorian Railways built a further nine copies of it. It was powered by a 220 hp Winton petrol engine which was used until the 1950s when they were converted to twin Diesel Electric engines giving a total of 255 bhp.^[1]

By the 1970s the longest regular scheduled journey run by a DERM was the Bendigo to Robinvale run, withdrawn on 3 June 1978. A DERM with a DERM Trailer car ran a regular passenger train on the South Gippsland Line from the 1960s - 1970s.^[2] In the late '70s RM 55 and RM 61 were extensively modified with the cab being rebuilt, the engine being relocated and the engine room rebuilt with porthole windows, and new aluminium cabin windows fitted. As such they looked significantly different.

DERMs with the porthole windows were a familiar sight on the Mornington and Stony Point lines prior to the line closures in the early 1980s.

Trailers

As of 1983, 28MT had been scrapped and 27, 29 and 30MT were all withdrawn account poor condition, and the Brill trailer 200MT was stored unservicable at Newport workshops. 26MT was still in use along with the ex-W-type trailers 31MT, 32MT, 33MT and 34MT.

Details of vehicles

Motor units ^[3]^[4]

Railmotor	Entered service	Upgraded to DERM	Withdrawn	Current Status	Notes
55RM	7/3/1928	27/10/1952	1993	Preserved - Operational	"Super DERM" - SGR
56RM	29/3/1930	29/8/1952		Pending Restoration	Steamrail Ballarat
57RM	16/4/1930	30/12/1952	1982	Scrapped
58RM	3/5/1930	10/5/1952		Preserved - Operational	DERMPAV
59RM	14/5/1930	23/5/1953		Preserved - Unservicable	DERMPAV
60RM	18/6/1930	29/10/1951		Pending Restoration	DERMPAV
61RM	21/6/1930	29/10/1953	1978	Preserved - Operational	"Super DERM" - VGR
62RM	21/7/1930	26/1/1952		Preserved - Unservicable	YVR
63RM	7/8/1930	6/12/1952		Preserved - Operational	DCSR
64RM	27/4/1931	26/7/1952		Under Restoration	DERMPAV

Trailers ^[5]

Motor Trailer 29 in 1982

Railmotor	Entered service	Withdrawn	Scrapped	Notes
26MT	1930-04-29	1982		DCSR
27MT	1930-04-29	1982
28MT	1930-10-04	1981	1981
29MT	1930-09-26	1982
30MT	1930-09-26	1982

Diagram of VR Railmotors

Preservation

All but one of the DERMs have survived into preservation, with 57RM being the only DERM to have been scrapped. Four are operational, with the remaining five in various conditions. Below is a brief outline of the status of the DERMs (as at February 2016):

55RM - "Super DERM" Stored at the former South Gippsland Tourist Railway Owned by VicTrack heritage, allocated to ARHS Museum on lease to SGR.
56RM - Stored at Steamrail Ballarat East, owned by VicTrack Heritage
57RM - Scrapped
58RM - Operational for mainline use, owned by DERMPAV
59RM - Was stored at Mornington Railway, transferred to DERMPAV in September 2015. To be used as parts for 58RM, then as a long-term restoration project.
60RM - Stored at Newport Workshops, owned by DERMPAV
61RM - "Super DERM" Operational at the Victorian Goldfields Railway.
62RM - Undergoing restoration at the Yarra Valley Tourist Railway
63RM - Operational on the Daylesford Spa Country Railway; visually restored to 1930s livery of dark red with silver stripes
64RM - Under restoration by DERMPAV

Model Railways

HO Scale

Steam Era Models produces a plastic kit (including a motor) for the DERM.^[6]^[7]
Trainbuilder has released sets of DERM+Trailers in ready-to-run brass.^[8]
Eureka Models has announced an intent to release ready-to-run models sometime in the future.

References

↑ "DERM Railmotors". VictorianRailways.net. Retrieved 4 June 2008.
↑ Banger, Chris (March 1997). "Rail Passenger Service Withdrawals Since 1960". Newsrail. Australian Railway Historical Society (Victorian Division). 25 (3): 77–82.
↑ "Surviving E.M.C. Railcars - DERMPAV". Retrieved 1 November 2016.
↑ "DERM/PERM - Pjv101.net". Retrieved 1 November 2016.
↑ "Derm Trailers - Pjv101.net".
↑ http://www.steameramodels.com/locos.htm
↑ http://www.railpage.com.au/f-p1117090.htm
↑ http://trainbuilder.com/derm

External links

Locomotives and rolling stock of the Victorian Railways, predecessors and successors

Melbourne & Hobson's Bay Railway Company	Pile Driver Engine (1854) First Engine - 2-2-2WT (1854) 2-4-0WT (1854) Pier Donkey No.5 - 0-4-0WT (1857) 2-4-0WT (1858), later N Class

Geelong & Melbourne Railway Company	Ariel - 0-4-0T (1855) Titania, Oberon, Typhoon & Sirocco - 2-2-2WT (1855) Hurricane & Cyclone - 2-4-0WT (1857) Goliath, Hercules, Smason & Tubal-Cain - 0-6-0WT (1855)

Melbourne & Suburban Railway Company	Hawthorn & Richmond - 2-4-0T (1860) Kew & BN#1378 - 2-4-0WT (1861)

Melbourne Railway Company	Windsor & Prahran - 2-4-0WT (1863)

Melbourne & Essendon Railway Company	Essendon (BN#458), BN#459 & BN#488 2-4-0T (1861), later SAR E Class

Melbourne & Hobson's Bay United Railway Company	Toorak, Victoria, No.16 & No.19 - 2-4-0T (1865) 4-4-0WT (1871), later C Class Pier Donkey No.24 - 0-4-0WT (1875)

Victorian Railways steam locomotives, F.C. Christy period (1858-1870)	No.1 (passenger) 2-2-2, later 2-4-0 (1857) 'Old' V class (goods) 0-6-0 (1857) P class 0-6-0 (1859) J class 2-2-2, later 2-4-0 (1859) B class 2-4-0 (1861) L class 2-4-0ST (1861) O class 0-6-0 (1861) G&MRC engines 19, 21, 34-44 evens only (1960's)

Victorian Railways steam locomotives, W. Meikle period (1871-1877)	No.100 2-4-0 (1872) Q class 0-6-0 (1873) No.103, No.105 & U class 0-6-0 (1873) T class 0-6-0 (1874) F class 2-4-0 (1874), later 2-4-2T (1910) K class 2-4-0 (1874) G class 4-4-0 (1877) H class 4-4-0 (1877) No.162 & No.164 4-4-0 (1877)

Victorian Railways steam locomotives, S. Mirls period (1878-1890)	M class 4-4-0T (1879), later ME class 4-4-2T (1901) 'Old' R class 0-6-0 (1879) W & S class 4-6-0 (1880) Pier locomotives 0-4-0WT (1880) 'Belgian' R class 0-6-0 (1883) Locomotives for Motor service - Rowan 0-4-0T (1883) 'Old' A class 4-4-0 (1884) X class 0-6-0 (1886) N class 2-4-0WT (1886) C Class 4-4-0WT (1886) D class 4-4-0 (1887) Y class 0-6-0 (1888) 'New' A class 4-4-0 (1889) 'New' R & R^Y class 0-6-0 (1889) E class 2-4-2T (1889)

Victorian Railways steam locomotives, A.D. Smith period (1877, 1890-1893)	E^E class 0-6-2T (1893) Locomotives for Motor service - Z Class 2-4-0T & 0-6-0T (1893)

Victorian Railways steam locomotives, T.H. Woodroffe period (1893-1912)	V class 2-8-0 (1899) A^A class 4-4-0 (1889) M class 4-4-0T (1879), later M^E class 4-4-2T (1901) D^D class 4-6-0 (1902), D^D_E later D⁴ class 4-6-2T (1908) A² class 4-6-0 (1907) Modified tank locomotives for Motor service - N class 2-4-0WT (1895), C Class 4-4-0WT (1904), F class 2-4-2T (1910) Modified tender locomotives for Motor service - H150 4-4-0 (1908), J4, J6 2-4-0 (1908)

Victorian Railways steam locomotives, W.M. Shannon period (1912-1919)	C class 2-8-0 (1918)

Victorian Railways steam locomotives, A.E. Smith period (1919-1928)	D¹ class 4-6-0 (1922) , D² class 4-6-0 (1922) K class 2-8-0 (1922) N class 2-8-2 (1925) S class 4-6-2 (1928)

Victorian Railways steam locomotives, N.C. Harris period (1928-1933)	D³ class 4-6-0 (1929) X class 2-8-2 (1929)

Victorian Railways steam locomotives, A.C. Ahlston period (1933-1955)	H class 4-8-4 (1941) R class 4-6-4 (1951) J class 2-8-0 (1954)

Diesel-electric	A Class Co-Co (1983) B class Co-Co (1952) C class Co-Co (1977) F class 0-6-0 (1951) G class Co-Co (1984) H class Bo-Bo (1968) N class Co-Co (1985) P class Bo-Bo (1984) S class Co-Co (1957) T class Bo-Bo (1955) V class Co-Co (2002) X class Co-Co (1966) XR class Co-Co (2002) XRB class Co-Co (2005) Y class Bo-Bo (1963)

Diesel-hydraulic	M class 0-6-0 (1959) V class 0-4-0 (1959) W class 0-6-0 (1959) CS class CargoSprinter (2002)

Rail tractor	RT class 0-4-0 (1952) LT4 0-4-0

Electric	E class Bo-Bo (1923) L class Co-Co (1953)

Railmotors	Rowan Steam Car McKeen Kerr Stuart AEC Leyland (Double Ended) Brill DERM (PERM) Walker railmotors DRC railcar Sprinter DMU VLocity DMU Trailer cars

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2 ft 6 in (762 mm) Narrow gauge	NA class 2-6-2T (1898) G class 2-6-0+0-6-2 (1925) Passenger carriages Freight vehicles Guards vans Other

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