KTM/KTP-1

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KTM/KTP-1
Tram-monument in Arkhangelsk
Manufacturer	UKVZ
Constructed	1947-1961
Number built	≈2280
Capacity	16 seats
Specifications
Train length	10,200 mm (33 ft 6 in) / 10,230 mm (33 ft 7 in)
Width	2,530 mm (8 ft 4 in)
Height	3,060 mm (10 ft 0 in)
Doors	4
Maximum speed	40
Electric system(s)	600 V
Bogies	2
Track gauge	1,524 mm (5 ft)

KTM-1 is a Soviet-made two-axle tram with a body made of solid metal, while KTP-1 is a two-axle trailer car to intended to work under KTM-1 traction. It was the first Soviet-made tram to be originally single ended, as well as designated to work on looped (not dead-end) lines. Also, it was a first Soviet-made tram with wide four-segment folding doors and bigger passenger storage spaces. Doors were driven pneumatically.

History[]

KTM/KTP1 developments began right after the end of World War II. These trams were intended to replace obsolete pre-war trams. KTM/KTP1 was a kind of transitional stage between pre-war and post-war tram developments. Unlike the majority of pre-war trams, the КТМ/КТП-1 featured a solid metal body. But, like pre-war trams, they were two-axle and intended to be used as pairs. Later on, people refused to use two-axle trams; and tram production changed so all new trams were equipped with bogies. And the , as well as came into use, on segments with huge ridership.

The production[]

The production of experimental KTM/KTP1 trams began in December 1947 in a Tram Manufacturing Plant in Ust' Katavsk City. In the next year, the plant started serial production of the trams. Production lasted until 1961, when the plant switched to the production more modern KTM/KTP-2 trams.

Usage[]

The KTM/KTP1 worked in so many cities that it is easier to point the cities where these trams were not used! In Russian Federation these cities were Zlatoust, Kolomna, Kopeysk, Kursk, Leningrad, Noginsk, Smolensk, and Yekaterinburg.

KTM/KTP-1 retirement[]

KTM/KTP-1 trams started to be removed from passenger service by the middle of the 1970s. In Ukrainian cities of Zaporizhia and Odessa, Ukraine, KTM/KTP1 were in service till 1986. Some of them were rebuilt into service trams.

Technical Features[]

The body of the tram is rigid (solid) and continuously welded of metal. The frame and the coating are the main carrying elements. Doors - single segment, from right side only (the tram was built as a one side). The tram was designed for a wide gauge tracks, as found in Russia (1,524 mm (5 ft)), however in Rostov-Na-Donu KTM/KTP-1 were rebuilt for European rail gauge (1,435 mm (4 ft 8+1⁄2 in)).

The motor tramcar was driven by fast DK-254А engines, with a power of 50 kW (67 hp) per each. Two step reductor was used as a power transmission from a traction motor to the leading wheel pair. In the rear wheel pair a two step reductor with a kardan of an automobile type was in use. The tram was driven using the fist-like controller МТ-22 or МТ-1. The tram collected electric power by a , however in Rostov-na-Donu trolley poles were in use. The brakes and doors were pneumatic. There was a special valve, which caused the tram to come a full stop if a multiple unit was broken. It was also equipped with a hand brake.

Due to high use on some routes, three and four car tram couples were used. This was done since KTM/KTP1 trams were not intended to work as multiple traction systems. In these cases the motor circuits of two tramcars are combined into one, and everything was done as in 4-car units.

The low level of comfort is a major fault of the tram. The seats in trams were wooden. Since the car-base of the tram was not perfect, the tram squealed while making turns. Compressors also made much noise.

Due to external similarity sometimes it is possible to draw similarities between the КТМ-1 and the American-made PCC trolley. In reality, this similarity is only in external view. As opposed to the PCC trolleys, which had boogies, КТМ-1 was a double-axle tram. The control system of KTM-1 was also different to PCC.