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📌 Autocarretta OM 36 Light Artillery Tractor, IWM Duxford.

To speed up and improve Troop movement in the high mountains and the Barracks located at the bottom of the valley, at the beginning of the 1930's some Light Vehicles were designed and put into operation, such as the 6.5 ton Lancia 3Ro 4x2, also used as a Self-Propelled Anti-Aircraft Gun, the Fiat-SPA 38R 4x2 and the Fiat Dovunque 33, the most versatile and used vehicle was the OM Autocarretta.

 

In 1927, the newly established Automotive Technical Inspectorate of the Royal Army, in order to improve and speed up the connections between the troops operating in the mountains and the Barracks located at the bottom of the valley, issued a competition notice "service in the mountains" for the design and construction of a small truck capable of operating on Military Mule Tracks in the mountains. Four companies, Ansaldo, Ceirano, Fiat, and Lancia were invited to present their projects. The last three were already companies that had supplied numerous excellent vehicles to the Royal Army, such as the 6.5 ton Lancia 3Ro 4x2, the Fiat-SPA 38R 4x2, the Fiat Dovunque 33 and the Ceirano 50. The Ansaldo company of Genoa had passed, in the same year, under the control of Macchi of Varese, which had acquired control of the majority of the shares. President of the company the mayor of Milan, Ernesto Belloni, had just been appointed.

 

Ansaldo Automobile SA of Turin commissioned the engineer Giulio Cesare Cappa, who had left Fiat to open his own technical office, to design the new vehicle. In response to the "mountain service" call, Fiat presented the 1014 model, the Ceirano the 1015 model, while Lancia refused to present anything in the first six months of 1931. Unexpectedly in 1930, and out of the official competition, Moto Guzzi presented an elaboration of the Three-Wheeled Machine Gun, first transformed into a Light Tractor for towing a 65/17 Mod. 1908/1913 Artillery Piece up the mountain, and then in a Tracked or Wheeled Truck with two rolling trains released from the chassis.

 

The prototype of the Ansaldo Mountain Truck was tested in the valleys of the Pinerolo area in December 1929, and on the 13th of the month, starting from San Germano, it reached Ruata di Pramollo advancing on a very narrow Mule Track. Due to the financial difficulties facing Ansaldo, the project was sold for marketing to the company OM of Brescia, which increased the engine displacement from 1,350 cm³ to 1,615 cm³. Thus modified it was presented in three copies to the homologation tests which took place in the second half of 1931, but a production order for a first batch had already been placed in the first half of the year. The homologation took place in the first half of 1932, and the messenger was officially designated Autocarretta 32, while all competing models were abandoned. In 1933 OM became part of the Fiat Group, and a special body was tested for the transport of Personnel, and a Bowser version for the transport of water.

 

In the first six months of 1934, a vehicle modernization project was started, by installing a Bosch dynamo capable of powering the central headlight and the two side lights, which previously operated on acetylene, the track was increased to 3ft 7in to try to improve the driving behavior, which was difficult, and improvements were also introduced to the suspension and steering linkage. These modifications gave life to the truck version 35, and were later adopted retroactively on the model 32. The use of a pre-selector remained at an experimental level Wilson, while in the course of a second order for the 32 model, 20 examples of a Personnel Transport version called the ''Mountain Reconnaissance Car'' were built.

 

With the adoption of the Baistrocchi order, the Royal Army established the first two Motorized Divisions, the ''Trento'' and the ''Po''. The adoption of pneumatic wheels and a multiplier on the 35 model gave rise to the version called 36mt Truck, from which the 36 P or DM with torpedo bodywork were derived for the transport of a team of Riflemen with two Breda Mod. 30 Unit Arms mounted on it on Chiappi-Soriani candlestick supports. At an experimental level, the installation in single or twin carts of Fiat Mod. 35 6.5mm Machine Guns remained for shooting against Low-Flying Aircraft. In 1937 the 36mt model was revised by abandoning the pneumatic wheels, while maintaining the hydraulic shock absorbers, this variant was called the 37 Truck.

 

 

▪︎Type: Military Truck

▪︎Crew: 1 to 11

▪︎Designer: Julius Caesar Hood

▪︎Manufacturer: OM Autocarretta

▪︎Designed: 1930's

▪︎In Service: 1932

▪︎Main User: Royal Army

▪︎Variations: Mod. 32 / Mod. 35 / Mod. 36 DM / Mod. 37

▪︎Weight: 3560.5lb / Length: 12ft 5in / Height: 7ft

▪︎Fuel Capacity: 8.8 gallons

▪︎Powerplant: petrol 4 cylinders of 1616 cm³ 20hp to 23hp

▪︎Weight / Power: 12.38hp to 14.24hp per tonne

▪︎Traction: 4-wheel drive and steering

▪︎Suspension: double crossbow

▪︎Fuel Capacity: 8.8 gallons

▪︎Maximum Speed: 25mph

▪︎Range: 99.5 miles.

 

Taken from Wikipedia it.m.wikipedia.org/wiki/OM_Autocarretta

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Uploaded on December 20, 2019
Taken on March 25, 2016