CZK - Škoda KT 4

Railway car KT 4
The author of the text: Vladimir Karlický
Text edited according to the most recent data: Jiří Tintěra, Difrologický club - Prague

Basic technical data
- characteristics: truck with adjustable suspension, allowing the ride along the tracks and follow the road
- brief history: tractor was developed for the czechoslovak army
- type of vehicle: truck
- manufacturer: Škoda Plzeň
- marking manufacturer: KT4
- the designation of the soldiers. army: railway car, or railway car
- military registration number: OXX-475
- military registration number after the year 1932: 5781
- designation of the CSD: it is not known
- the designation of the Wehrmacht: it is not known
- years of production and trials: from 1932 to 1934
- produced: 1 prototype

In the second half of the 19. century for the army have become the railway's main and actually the only means of public transportation, which confirmed the first world war. At the same time, showed, that neither the dense rail network does not fully ensure the armies of the desirable mobility or necessary supply, especially when causing its damage or destruction. Therefore, already in this war, to take effect efforts to eliminate the complete dependence on the railway network. Was looking for a technical solution, allowing to according to the needs of the transport either along the tracks or along the road.

This solution made use of the austrian army by the most difficult of ground artillery, its trains "C", designed Daimlerovými races in the Vienna New Town in collaboration with pilsen Škodovými races, into whose sphere of influence then belonged, were intended for the traction of the 24 cm guns and the 38 cm and 42 cm howitzers. The total known is the pioneering application of benzínoelektrického drive. The solution worked and the trains were also soldiers. the army for its the hardest gun system Damage - 24 cm cannon vz. 16.

The idea of combining road and rail vehicles for 1. world war applied also for the other warring armies. In German is the most proven of the so-called railway truck Büssing. After the war, two of these cars purchased and csl. the army and used them pardubice railway regiment. There were, however, very worn (production year 1915 !), a few powerful, structurally obsolete (chain-driven rear wheels) and in the operation of complicated (and unable to return journey). Therefore, the MNO to the end of the 20. the years looking back after refund.

The design solution was yet not easy. Required to make the transition from road to track, or vice versa, it could perform anywhere and in a short time, only by the means located on the vehicle.

To design your own track car has embarked on and the pilsen škoda the škoda works races. Stimulus has become the order of the prototype of the MNO in the year 1931. Experience with the construction of the special road vehicles and locomotives in Pilsen had. However it was not easy to reconcile conflicting requirements arising from the different conditions of operation, whether it was management, the adjustment of the gearbox, odpérování and security point of view. The vehicle KT4 robust construction, good performance and operationally reliable. The various sub-deficiencies have been after the first tests of the prototype in August of 1932 removed. Focused on cooling the engine, transmission and electrical lighting.

The new tests took place in April 1934 on the road Pilsen-Klatovy and on the railway line Pilsen-the New Courtyard/Pšovany-Bezdružice. There were no operational glitches. The prototype was then moved by road to Prague, where it was at the machinery service of the Military technical and aviation institute in the Program completed a preliminary receipt. The technical conditions of the order Škoda basically fulfilled, exceeded it was only the mass of the vehicle (about 10%). Due to the fact that the vehicle should be used by the railway regiment mainly for riding on the rails, the commission has decided to MNO exceeding the weight tolerate. AMOUNTS paid for the prototype 290000 Csk. Finally the car was KT4 taken in July 1934 by a railway regiment in Pardubice. Truck loaded with a cargo of 5 tons with the attached 3 goods wagons with a total weight of 68 tonnes, easily surpassing the railway line to climb 17%. It is interesting that the opposition did not create the relatively long time required for adjustment of the vehicle from the road to the hostel, where zapracovaným workers of Skoda lasted for mounting a half hours, but nezacvičenému the ranks of the railway regiment three times.

Škoda counted with the fact that MNO after taking prototype orders the army of the entire series, it didn't happen. The operation of the railway regiment showed that the benefits of the combined vehicle are not so unambiguous and so the vehicle KT4 remained only a unique technical attractions.

Technical data
- the mass of the vehicle, standby: 9030 kg
- vehicle weight, maximum: up to 14500 kg
- length over buffers: 7180 mm (other sources indicate 7205 mm)
- length without bumpers: 6650 mm
- width: 2230 mm (other sources indicate 2440 mm)
- height: 2800 mm
- the height of the steering wheel: 2150 mm

The power unit
- engine: Škoda (without further details)
- type of engine: lihobenzínový, 6 cylinders in a row
- cooling: water, 2 radiators
- content: 7273,56 cm3
- drilling: Ø 105 mm
- stroke: 140 mm
- power: 49,3 kW (67 k) at 1400 rpm for min.

Gearbox
- type: Škoda
- number of gears: 4 forward and 4 reverse
- the degree of reduction: 1

Performances
- the speed of driving on the road: 18 km/h
- the speed of the drive on the rail of 20,5 km/h
- load, on the truck bed load of weight: 5,4 Mg (tons)
- on the road trailer on the weight: 6 Mg (tons)
- on the railways, wagons on the weight of: 30 to 70 Mg (tons)

Consumption lihobenzínové mixture on the 100 km drive
- on the road: 132 dm3
- on the rail: 102-114 dm3

Chassis
- configuration: 4x4
- chassis weight: 6700 kg
- the track width of the front: 1550 mm
- wheel track rear: 1710 mm
- wheelbase: 3400 mm

Tires
- tires plnopryžové, number: 6 pieces
- dimension: Ø 1050x160 mm
- on the front simple rear raised
- the dimension of the rim: Ø 850 mm
- rail nákolky, number: 4 pieces
- dimension: not known

The braking system
- foot: all-wheel pneumatic brake system Skoda-Knorr
- manual: rear-wheel
- mountain of a prop: 1 set

A note at the conclusion
The vehicle behind which moved karburátorové nozzle for three types of lihobenzínové mixture Dynalkol: 85, 90 and 95.

Used images are taken or adapted from the following sources.

Resources
Vladimir Karlický: the Combined vehicle, the ATOM, 1979, no 5, party 8 and 9.
George Tintěra: Personal difrologické notes from the years 1970 to 1990
The archive of the ministry of the interior, the fund of the Provincial authority: the Official certificate no. 46.3289/1-1932 of the day: 23.11.1932, of the certificate drawn up under čj. INSTITUTE 662.721-1932 on 27.12.1932.
CSN 011300 Table SI, Prague 1977
Extinct enterprise archive Škoda Praha, fund ŠZ, travel report, 1930-1935.
Extinct enterprise archive Škoda Praha, fund ŠZ, photos no 83-1547.
Extinct enterprise archive Škoda Praha, fund ŠZ, drawing: Am 6394, the "Chassis rail of the car" from the 14.07.1932.
Extinct enterprise archive Škoda Praha, fund ŠZ, drawing: Am 363 S, "Location svít. on the track. autom." from 15.10.1932.
VHA, fund NUMBER, purchase order: Ref. 4357-dův-In/3.intr-1931.
VHA, fund NUMBER, department IV. 1. department: Protocol, 12.04.1934.
VHA, fund NUMBER, department of II. and IV., 1. regiment rail, 1930-1935.

The Internet
http://353.hamradio.cz/vpd/foto2.htm
vlaky.net
vojenstvi.cz
http://vojenstvi.cz/vasedotazy_24.htm
http://www.blackjacks.ic.cz/vvp_pardubicky.html
http://www.trolejbus.cz/vpd/foto1.htm
http://www.trolejbus.cz/vpd/index.htm
http://www.trolejbus.cz/vpd/vpdpark.htm
http://www.volny.cz/klimpl/drazka.htm.

Railway car KT 4
Used drawings based from the original designs of the factory drawings of the no Am363S and Am6394, which may still own the pilsen Archive of the Damage.

Source
Extinct enterprise archive Škoda Praha, component: Technical documentation of the combined vehicle KT4..