nohab

nohab

Having succesfully operated diesel-electric traction since 1935 with it's Lyntog or 'Lightning' DMU sets; the Danish State Railways (DSB) in 1954 sought to offset main line steam by introducing diesel electric traction for heavy haulage. At this early stage in the developement of diesel electric locomotives, the DSB sensibly ordered 5 units from the most experienced manufacturer of the time, General Motors - Electro Motive Division.

Built by Nydquist och Holm AB or NOHAB in Sweden, under license from GM-EMD, and powered by EMD's 16 cylinder 567 cid prime mover; the prototype 'Mv' class were basically a 1700HP US F-type cab unit with a second driving cab at the B or No.2 end. The most notable departure from the otherwise classic American styling was the provision of suitable screw couplers and buffers. A six wheel truck based on that of the EMD 'E unit' with an A1A-A1A wheel arrangement kept axle loads to a level acceptable for European permanent way,

So impressed was the DSB that a production run of 54 virtually identical units with slightly uprated 1950HP engines was delivered, and designated class 'My'; followed by a further delivery of 45 1425HP units classified 'Mx'.

Having trialled diesel hydraulic power on the Oslo - Bergen corridor, the Norwegian State Railways (NSB) found the hydraulic transmission unsuitable for use on the arduous grades between Voss and Geilo. Also in 1954, the NSB began to take delivery of 1750HP EMD-NOHAB units of a Co-Co wheel arrangement. Classified Di3a, these units would become the most reliable locomotives ever to work the Norwegian system.

Between 1958 and 1960, NSB took delivery of an A1A-A1A version built for the Finnish Railways (VR) who had cancelled their order for NOHAB diesels. These visually almost identical units were ideally suited to passenger work with the fastest gear ratio of all EMD-NOHABS enabling a top speed of 143km/h; and a lower starting tractive effort. These 3 units, classified Di3b were unpopular with maintenance crews due to their slightly different trucks and traction motors; though the class outlasted it's more numerous relative due to it's effectiveness as a passenger locomotive.

In 1960 the Hungarian State Railways MÁV, requested worldwide tenders to construct diesel electric locomotives with an output of 1000-1500 kW for mainline duties. Tenders were received from all the major Western European manufacturers, and 2 proprietaries provided demonstrator models. Krauss Maffei sent a 6-axle version of the DB V200 diesel hydraulic; and NOHAB arranged for an NSB Di3 to travel accross Europe.

Both locomotives performed well, but recent bad experiences with hydraulic transmission in Ganz shunters, and an unwillingness to maintain a locomotive containing two prime movers led to MÁV's decision to opt for the NOHAB units which had been very reliably operated in Denmark and Norway for several years.

Classified M61, the first MÁV NOHABS were pressed into service during 1963 to help alleviate the shortage of motive power on the Budapest - Miskoll line. As more units were delivered they worked from Budapest to Vienna, Kurtos and Subotica; eventually covering all non-electrified lines on the Hungarian system.

NOHAB EMD

Wheel ArrangementP: Co-Co
Engine EMD: 16-567
Starting Tractive Effort: 292kN
Continuous Tractive Effort: 198kN @ 20km/h
Max. Speed: 105 km/h
Driving Wheel Diameter: 1040mm
Length: 18.900m
Weight (roadworthy): 108.660t
Width Overall: 3.090m
Height Overall: 4.280m

nohab
• config.txt 38.18KB
nohab_alpha_numbers
alphanumber_0.tga 4.04KB
alphanumber_1.tga 4.04KB
alphanumber_2.tga 4.04KB
alphanumber_3.tga 4.04KB
alphanumber_4.tga 4.04KB
alphanumber_5.tga 4.04KB
alphanumber_6.tga 4.04KB
alphanumber_7.tga 4.04KB
alphanumber_8.tga 4.04KB
alphanumber_9.tga 4.04KB
nohab_art
consist.bmp 9.05KB
consist_a.bmp 9.05KB
nohab_art_512.texture.txt 65 bytes
nohab_art_icon.texture.txt 65 bytes
preview.bmp 257.05KB
preview_a.bmp 257.05KB
nohab_body
digit_1.texture.txt 30 bytes
digit_1.tga 4.04KB
digit_2.texture.txt 30 bytes
digit_2.tga 4.04KB
digit_3.texture.txt 30 bytes
digit_3.tga 4.04KB
digit_4.texture.txt 30 bytes
digit_4.tga 4.04KB
digit_5.texture.txt 30 bytes
digit_5.tga 4.04KB
digit_6.texture.txt 30 bytes
digit_6.tga 4.04KB
env_glass.bmp 12.05KB
env_glass.texture.txt 32 bytes
env_metal.bmp 12.05KB
env_metal.texture.txt 32 bytes
light-light_o.texture.txt 47 bytes
light.tga 3.04KB
light_o.bmp 2.05KB
main.bmp 257.05KB
main.texture.txt 27 bytes
nohab_body.pm 790.69KB
nohab_shadow
black.texture.txt 28 bytes
black.tga 812 bytes
nohab_shadow.pm 190.02KB