The BA-3 ( Russian : Broneavtomobil 3 ) was a heavy armored car developed in the Soviet Union in 1933, followed by a slightly changed model BA-6 in 1936. Both were based mostly on BA-I , the most important development being the new turret, same as in the T-26 m 1933 and BT-5 tanks, and also equipped with the 45 mm main gun.
19-614: 221 BA-3 cars were built at the Izhorskij and Vyksunskij factories, until production ended in 1935. BA-6 followed with 386 cars produced between 1936 and 1938 in Izhorskij factory. Most BA-3 production was based on the Ford-Timken chassis , a 6×4 modification of the US Ford AA 4×2 truck, but the last batch was built on the Russian version of the same chassis - GAZ-AAA , and continued to be used in
38-500: A 10mm thick welded, conical turret. A 71-TK-1 radio and 50 hp GAZ-M engine were installed The BA-9 was a lightened (4,300 kg) vehicle based on the BA-6M, built in 1936. The 20K gun was replaced by a 12.7mm DK machine gun (early version of the DShK ) and a 7.62 Degtyaryov machine gun was installed in the hull. 100 were ordered, but production was dropped after two prototypes were completed due to
57-491: A body and interior to a customer or dealer's specifications. Important names in the United States included Lebaron , Fleetwood , and Rollston . Over time top luxury automakers absorbed one or more of their vendors and moved vehicle finishing in-house. Separate chassis remain in use for almost all heavy vehicles ranging from pickup trucks to the biggest trucks and commercial passenger carrying vehicles. The rolling chassis
76-446: A government agency like National Highway Traffic Safety Administration (NHTSA) in the U.S. defines the design standards of chassis and body conversions. An armoured fighting vehicle 's hull serves as the chassis and comprises the bottom part of the AFV that includes the tracks , engine, driver's seat, and crew compartment. This describes the lower hull, although common usage might include
95-689: A more extensive pillar bedding, providing a metal-on-metal bearing surface that has reduced shifting potential under the stress of recoil . A barreled action bedded into a metal chassis would theoretically operate more consistently during repeated firing, resulting in better precision . With the increasing availability of CNC machining , chassis have become more affordable and sophisticated as well as gained increasing popularity as these types of chassis can be expanded to accommodate customizable "furniture" ( buttstock , pistol grip , etc.) and rail interface systems that provide mounting points for various accessories. Rolling chassis A rolling chassis
114-480: Is also used to describe the chassis and running gear of a vehicle in a body-off restoration. Prior to unibodied vehicles, the rolling chassis stage was common to the manufacture of all motorcars. Mass-produced cars were supplied complete from the factory, but luxury cars such as Rolls-Royce were supplied as a chassis from the factory to several coachbuilders , in its case J Gurney Nutting & Co , Mulliner , Park Ward , and others. These handcrafters would supply
133-411: Is the load -bearing framework of a manufactured object, which structurally supports the object in its construction and function. An example of a chassis is a vehicle frame , the underpart of a motor vehicle , on which the body is mounted; if the running gear such as wheels and transmission, and sometimes even the driver's seat, are included, then the assembly is described as a rolling chassis . In
152-463: Is the fully-assembled chassis of a motor vehicle ( car , truck , bus, or other vehicle ) without its bodywork . It is equipped with running gear (engine and drivetrain ) and ready for delivery to a coachbuilder to be completed. Historically, bespoke luxury automobiles were finished inside and out to an owner's specifications by a coachbuilder, and specialty vehicles (such as fire engines) were outfitted by firms devoted to that task. The term
171-682: Is usually not necessary for the integrity of the structure, is built on the chassis to complete the vehicle. For commercial vehicles , a rolling chassis consists of an assembly of all the essential parts of a truck without the body to be ready for operation on the road. A car chassis will be different from one for commercial vehicles because of the heavier loads and constant work use. Commercial vehicle manufacturers sell "chassis only", "cowl and chassis", as well as " chassis cab " versions that can be outfitted with specialized bodies. These include motor homes , fire engines , ambulances , box trucks , etc. In particular applications, such as school buses ,
190-887: The Spanish Civil War , against the Japanese in the Battle of Khalkhyn Gol , in the Finnish Winter War , and against the Germans in the early stages of the Eastern Front . The German Army used a few AAC-1937 , Spanish-built six-wheeled armored cars that were close copies of the BA-3/6 series. Later in the war, the BA-3/6/10 were replaced in the Red Army's heavy scout vehicle role by light tanks, such as
209-550: The T-60 and T-70 . A few captured BA-3 cars were used by the Finnish army under the designation BAF A (sometimes also BA-32-1 ), and captured BA-6 cars under the designation BAF B . The BA-3 ZhD and BA-6 ZhD were designations for BA-3 & BA-6 cars that had been fitted with a rail kit consisting of hydraulic jacks and six railroad wheels. Limited numbers were produced. The BA-6M , built in 1937-1938, weighed 4800 kg and featured
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#1732855751598228-446: The circuit boards and other electronics are mounted. In some designs, such as older ENIAC sets, the chassis is mounted inside a heavy, rigid cabinet, while in other designs such as modern computer cases , lightweight covers or panels are attached to the chassis. The combination of chassis and outer covering is sometimes called an enclosure . In firearms, the chassis is a bedding frame on long guns such as rifles to replace
247-496: The BA-6. The biggest limitation of the BA-3 was the mobility, limited to roads or very hard ground, the result of unnecessarily large weight. The innovation that slightly improved mobility was the auxiliary ("Overall") tracks that could be fitted onto the rear tandem wheels, converting the car to a half-track . The BA-3 is externally very similar to the BA-6; the BA-3 had a door in the rear of
266-436: The case of vehicles, the term rolling chassis means the frame plus the "running gear " like engine , transmission , drive shaft , differential , and suspension . The "rolling chassis" description originated from assembly production when an integrated chassis "rolled on its own tires" just before truck bodies were bolted to the frames near the end of the line. An underbody (sometimes referred to as " coachwork "), which
285-409: The era; they could knock out other vehicles with ease, including tanks. However, their thin armor made them vulnerable to heavy machine gun fire and small caliber cannon fire. A prototype railway BA-3ZhD variant was created in 1936, but was not accepted for production. The BA-6ZhD was produced in limited numbers. Some 60 BA-6 cars were delivered to Turkey in 1935. The BA-3/6 were used in combat in
304-465: The hull that was not present in the BA-6. A more important improvement of the BA-6 was the new GK tires, filled with sponge ( porous rubber), and thus much less vulnerable to small-caliber fire. On the downside, the tires reduced both the speed and range of the vehicle, despite it having somewhat thinner armor. BA-3/6 cars were superseded by the BA-10 model. All cars of this series were very heavily armed for
323-472: The lack of DK machine guns. One prototype was sent to Moscow and the other to Leningrad. The BAZ was an experimental amphibious version of the BA-3. The welded hull was shaped like a boat and two sponsons were placed in the front. Two 389 cm brass screws were installed for use in water. Chassis A chassis ( US : / ˈ tʃ æ s i / , UK : / ˈ ʃ æ s i / ; plural chassis /- i z / from French châssis [ʃɑsi] )
342-460: The traditionally wooden stock , for the purpose of better accurizing the gun. The chassis is usually made from hard metallic material such as aluminium alloy (and less frequently stainless steel , titanium alloy or recently magnesium alloy ) due to metals having superior stiffness and compressive strength compared with wood or synthetic polymer , which are commonly used in conventional rifle stocks. The chassis essentially functions as
361-451: The upper hull to mean the AFV without the turret . The hull serves as a basis for platforms on tanks , armoured personnel carriers , combat engineering vehicles , etc. In the intermodal trucking industry, a chassis is a type of semi-trailer onto which a cargo container can be mounted for road transport. In an electronic device (such as a computer ), the chassis consists of a frame or other internal supporting structure on which
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