1) Ivo Pejčoch, Oldřich Pejs - Obrněná technika 6, Střední Evropa 1919-1945 I.část, vydavateľstvo ARES, Praha 2005, ISBN 80-86158-46-2
2) Jirka Tintěra via VÚA Praha, fond: MNO HŠ 3.odd., KL: 110, SL: 43 3/5-2, a 43 3/12-2, datováno 1. června a 10. září 1934 VÚA Praha, fond: VTLÚ, čj.1221-taj.-III-1934, datováno ke dni: 10. ledna 1935 VÚA Praha, fond: VTLÚ, koncepty zpráv škpt. Karla Dvořáka o jízdně-technických zkouškách, datované k dnům: 17. ledna a 31. května 1937 VÚA Praha, fond: VDO Tatra, čj.607/37, datováno ke dni: 20. ledna 1937 VÚA Praha, fond: VTLÚ, čj.28049-taj.-V/3.odd.-1938, datováno ke dni: 9. července 1938 R. Zavadil: korespondence s Difrologickým klubem, roky 1991 a 1992. R. Zavadil: Tank Tatra T-III, Historie a plastikové modelářství 1996, č. 12, str. 30-32 V. Francev a C. Kliment: Československá obrněná vozidla 1918-1948, Ares, Praha 1999, ISBN: 80-86158-06-3 K. Rosenkranz: Tatra nákladní automobily, MS Press Brno, edice: Auto album, ISBN: 80-900915-8-X
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Unsuccessful tanks Originally, the Kopřivnice-based company Ringhoffer-Tatra started construction work on the development of two pieces of the Combined Assault Vehicle (KÚV), according to the order of MNO ref. 153 Taj.-V/3. department 1932, on the condition that the rotating tower and weapons will be developed and delivered by the Pilsen-based Škoda. The condition of the order was also the delivery date of these two chassis on September 30, 1933. The term combined was in this case intended for a tracked version of the chassis, which could move either on wheels or on belts. It was a fashionable technical-tactical consideration of the possibility of accelerated movement on wheels over longer distances and the use of a crawler chassis for off-road driving. Due to the persistent problems with the technical solution of KÚV, the MNO itself is changing its opinion and under ref. 607 Taj.-III-1934 requires April 16, 1934 delivery of two pieces of pure crawler chassis T-III tank. At the same time, it changed its requirements for tank armor. The change in the assignment was based on a new idea of the division of tasks of attack vehicles on the battlefield. The Tatra construction was to correspond to III. degree of categorization of the Czechoslovak attack vehicle. This quality class included tanks designed to fight tanks and to break through field pre-prepared defensive positions. In the company's internal documents, this vehicle appears under the designation Tatra type 78 (type 78, T-78) and in business correspondence with the Czechoslovak Military Administration (VS), the designation T-III is used. In March 1936, the assembly of prototypes with serial numbers 20584 and 20585 was completed. The Commission, sent to VTLÚ on 27 June of the same year, ascertained the stage of development of both prototypes and, at the same time, finally decided on the deployment of the internal equipment. The prototypes are completed on October 9, 1936, and after a technical inspection, a list of defects is issued, which must be removed. Factory representative inž. Uebelacker requested an extension of the deadline for the completion of both vehicles until December 15, 1936. From Pilsen Skoda arrived one complete tank tower, which was designed as a single for all developed tanks of the III series.
Driving and technical tests, under the leadership of Capt. rammer. Karel Dvořák, were launched on February 22, 1937, and by March 25, the prototype without a tower had traveled 363 km, and by March 11, the prototype with a tower had traveled 460 km. Both machines suffered from numerous failures. After the repairs, the tests were to continue until June 15, but even after this date, another test drive is carried out in November. VTLÚ criticized Tatrovce for five basic shortcomings and demands their elimination. Test drives under the supervision of VS continue in the following year. They are often interrupted and the problems resolved, yet both prototypes suffered from permanent deficiencies in cooling, excessive stress on the drive mechanisms and huge fuel and oil consumption.
As of May 31, 1937, Capt. Dvořák III. Department of VTLÚ that with the prototype, which is assigned a military registration number 13,640, is driven from the beginning of the tests 1,030 km and with the number 13,641 is achieved 1,273 km. Prototypes never passed full-fledged military tests.
At the end of September 1938, both machines were handed over to the Vyškov Attack Vehicle Training Center (UÚV) and were left there as demonstration vehicles of medium tanks until a decision was made to liquidate them.
By decree no. 28049 Taj.-V/3. Dept.-1938, the MNO decided to liquidate the order and purchase both prototypes for an amount reaching CZK 1,600,000. Even before this date, the 3rd Department of the General Staff decided to scrap one of the prototypes. It is not known whether this happened before March 15, 1939. However, one thing is certain - based on the photographs published here - one machine was studied and accepted by the Wehrmacht for testing.
Tatra 78, designation čsl. VS: T-III Year of production: 1934 Car design: military order - 1st prototype, serial number: 20584, license plate: 13.640 - 2.prototype, serial number: 20585, license plate: 13.641 - made: 2 pieces Crew: 4 people Engine type: petrol, star number of cylinders: 11 - drilling: 120 mm - stroke: 145 mm - displacement: 18030 cm3 - cooling: air - speed: 2000 rpm. - power: 191.2 kW (260 HP) - divorce: OHV Transmission: - gears: 8 forward + 2 reverse degrees of reduction: Dimensions: - length: 5830 mm - width: 2590 mm - hull height: 1800 mm - total height: 2820 mm Chassis: - chassis weight, estimated: 16400 kg - driven axles: 2 rear - wheelbase of tensioning and driving wheel: 5070 mm - length of contact of the belt with the road: 4000 mm required - track of belt axes: 2080 mm - belt width: 1st prototype 350 mm/2nd prototype 370 mm - specific pressure: 78.5 kPa (0.8 kg/cm2) Performances: - maximum speed: 35 km/h Obstacles: - degree: 1 m - ditch: 2.5 m - boat: 1 m Armor: 16 to 32 mm Equipment: - 1x 4.7 cm cannon ÚV - 2x 7.9 machine gun vz. 37 Driven ammunition: - for cannon: 80 pieces - for machine guns: 4000 pieces The tower was developed by Škoda and could also be used with the Š-III tank.
Background: VÚA Prague, fund: MNO HŠ 3.odd., KL: 110, SL: 43 3/5-2, and 43 3/12-2, dated June 1 and September 10, 1934 VÚA Prague, fund: VTLÚ, ref. 1221-taj.-III-1934, dated to: January 10, 1935 VÚA Prague, fund: VTLÚ, draft reports škpt. Karel Dvořák on driving-technical tests, dated to: 17 January and 31 May 1937 VÚA Prague, fund: VDO Tatra, ref.607/37, dated to: January 20, 1937 VÚA Prague, fund: VTLÚ, ref.28049-taj.-V/3.odd.-1938, dated to: July 9, 1938 R. Zavadil: correspondence with the Diphrology Club, 1991 and 1992. R. Zavadil: Tank Tatra T-III, History and Plastic Modeling 1996, No. 12, pp. 30-32 V. Francev and C. Kliment: Czechoslovak armored vehicles 1918-1948, Ares, Prague 1999, ISBN: 80-86158-06-3 K. Rosenkranz: Tatra trucks, MS Press Brno, edition: Auto album, ISBN: 80-900915-8-X
Photos from the collection of Charles Kliment (possible-t-iii.jpg)
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Technici Wehrmachtu přejímají po 15. březnu 1939 podvozek prototypu tanku Tatra T-III.
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