The BTR-60 is the first vehicle in a series of Soviet eight-wheeled armoured personnel carriers (APCs). It was developed in the late 1950s as a replacement for the BTR-152 and was seen in public for the first time in 1961. BTR stands for Bronetransporter (БТР, Бронетранспортер, literally "armoured transporter").
The BTR-152 and BTR-40, the first two Soviet mass-produced APCs developed after the Second World War, gave the Soviet Army useful experience with wheeled armoured personnel carriers. However, even as they were designed, they weren't suited for the needs of the Soviet Army as they lacked a roof (which was added in later versions designated BTR-152K and BTR-40B respectively). The low combat values of the BTR-152 and BTR-40 were exposed when the Egyptian Army used them during the Suez Crisis. This was one of the reasons why the new APC was developed.
Between 1956 and 1957, a decision was made to convert all rifle and mechanized divisions into motor rifle divisions and a requirement for a new transport vehicle was drawn up.
Development proceeded along two paths: a more expensive vehicle that would eventually become the BMP-1, for use in tank divisions, and a cheaper vehicle for use in motor rifle divisions, that would eventually become the BTR-60. Two design bureaus were given the requirements, GAZ led by V. A. Dedkov, and ZiL led by Rodionov and Orlov. The requirements stated that the vehicle should have all wheel drive, at least two turnable axles, independent suspension as well as mobility and fording capabilities allowing it to operate alongside tanks. The vehicle was also supposed to be amphibious. The GAZ design team started to work on the new APC during the winter of 1956. Despite the fact that the army wanted a fully roofed vehicle with NBC protection system, the GAZ design did not have those features. It was argued that firing from the cramped interior would be difficult and that the limitation of losses wasn't a priority. The prototype was built between 1957 and 1958. ZiL developed a 6x6 design, the ZiL-153, similar in hull shape to the GAZ design. There were also three other 8x8 prototypes: Ob'yekt 560 (also known as MMZ-560), Ob'yekt 1015 (developed by KAZ), Ob'yekt 1015B (developed by KAZ, it had with a turret-mounted armament and stream propellers, also known as BTR-1015B) and Ob'yekt 1020B (developed by KAZ). All prototypes were submitted to and passed state trials in 1959. Even though the Ob'yekt 1015B performed best, the GAZ design was selected and given the designation BTR-60P. Officially, the committee that made the decision did so because of the GAZ plant's production capabilities and experience. The main reason was that the GAZ design was the simplest and cheapest one and introduced the fewest technological advancements, which made it easier to put into mass production.
BTR-60P had open-roofed crew and troop compartments, which was deemed to be a serious disadvantage. Accordingly, a new version with an armoured roof, designated BTR-60PA, entered production in 1963. This new version's capacity was reduced from 16 soldiers to 14 soldiers.
The appearance of the German HS.30 APC, which was armed with a 20 mm cannon, prompted the addition of the conical BPU-1 turret. This turret, which was originally developed for the BRDM-2 amphibious armoured scout car, was armed with the KPVT 14.5 mm heavy machine gun and a PKT 7.62 mm tank machine gun. The new vehicle was designated the BTR-60PAI and entered production in 1965. It was, however, quickly replaced by the BTR-60PB, which had a better sighting system for the machine guns.
BTR-60 was a revolutionary design for its time. It had a non-standard layout for an APC; the crew compartment was in the front, the troop compartment in the middle and the engine compartment in the rear. This meant that, while the BTR-60 did not share some of the weaknesses that other APCs had, it had several disadvantages of its own.
In the BTR-60, the crew compartment is located in the front of the vehicle and had a roof - unlike the troop compartment, which first received one with the introduction of the BTR-60PA. In the BTR-60P and BTR-60PA, the crew consists of a driver and a commander. The driver's seat is on the left and commander's seat is on the right. In the BTR-60PAI, BTR-60PB and BTR-60PZ, the crew consists of a driver, a commander and a gunner. The position of the driver and commander stations remained unchanged in later models. The gunner operates the BPU-1 turret, using the PP-61A optical sight. In the BTR-60P, both the driver and commander manned their positions by entering the vehicle through the sides. The BTR-60PA introduced two hatches over their stations and crew members had to climb on top of the vehicle to use them. The entry method did not change in later production models. The BTR-60B introduced a side door for the gunner on the right side, and firing ports for both the driver and commander, and two for the gunner, one on each side. (For more information on the BTR-60's firing port see the troop compartment section). Both the driver and the commander have forward views through bulletproof windshields, onto which steel covers can be lowered. In the BTR-60P and BTR-60PA, the covers had vision slots, and additional slots on both sides of the crew compartment. These were removed in the BTR-60PB in favor of two periscopes on each side.[clarification needed] In early models of the BTR-60P and BTR-60PA, only the driver had a periscope, while the commander had a removable OU-3 infrared searchlight. In the BTR-60PB, both the driver and the commander have three periscopes in the front (the commander's center periscope can be hard to see as it's just below the OU-3 infrared light). The vehicle was usually equipped with an R-113 radio; however, some models used the R-123. The initial BTR-60P production model lacked night-vision and had only four headlights (two infrared, two white, one of each kind per side, these remained in all BTR-60 models). Late BTR-60P models were fitted with night-vision; the TKN-1 connected with the OU-3 infrared searchlight for the commander and the TWN-2 for the driver. This remained unchanged in later models.
The troop compartment is behind the crew compartment and in front of the engine compartment. The BTR-60P can transport up to 16 fully equipped soldiers. This number reduced to 14 in BTR-60PB. As the BTR-60P didn't have a roof, it was covered with a tarpaulin when traveling in bad weather conditions. It was also covered with bows and canvas. Also, all BTR-60 models had three firing ports on each upper side of the hull through which the infantry being transported could fire at the enemy with their personal weapons. The difference between models was in the position of these three firing ports. The BTR-60P and BTR-60PA had the firing ports positioned in a row between the middle and the front part of the troop compartment. In the BTR-60PB, the firing ports were relocated; one was next to the driver and commander, one next to the gunner and one in the side of the troop compartment.
Because of the engine placement (in the rear of the vehicle), transported infantry must mount and dismount through the sides in the BTR-60P or through the roof hatches in the roofed BTR-60PA, BTR-60PB, and BTR-60PZ variants. To help the infantry to mount and dismount the vehicle, the BTR-60P had two steps on each side of the hull, one between the first and second pair of road wheels and the other between the third and fourth pair of wheels. It also had two vertical hand rails on each side of the troop compartment, as well as an angled horizontal one on the left-hand side of the hull next to the engine compartment. The BTR-60PA introduced yet another step on each side of the hull between the second and third pair of wheels, as well as six horizontal hand rails on each side of the vehicle, three on the lower side and three on the upper side. The vertical ones were removed, while yet another angled horizontal one was added on the right-hand side of the hull next to the engine compartment. In the BTR-60PB, the number of hand rails decreased from six to five on each side of the hull; the rear upper hand rail was removed from he right side, whereas the center upper one was removed from the left side. The BTR-60P has two doors on each side of the troop compartment (one in the front and one in the rear), but infantry still had to dismount through the sides. The side doors were removed in the BTR-60PA. They were used mostly as emergency exits and as auxiliary firing ports. In the BTR-60PB, a side door was added on the front left of the troop compartment.
The hull armour is made from welded steel and provides protection against small arms fire and shrapnel. The frontal armour can withstand 7.62 mm bullets from any range. The rest of the armour can withstand 7.62 mm bullets from a range of 100 m.
The BTR-60P did not have a roof over the troop compartment, which made a weakness that could easily be exploited—even the simplest explosives could take out a BTR-60P. The new BTR design with a roof was called the BTR-60PA.
Armour thickness is as follows:
The BTR-60 has a 8x8 suspension. Originally, there were difficulties in finding a suitable engine for it: the six-cylinder GAZ-40P gasoline engine, which produces 90 hp, had insufficient power, while the 205-hp YaAZ-206B was too heavy. Instead, the BTR was fitted with two six-cylinder gasoline GAZ-40P engines (67 kW) located side by side in the rear of the vehicle. The combined power of the engines is 180 hp (134 kW). Each engine propels two of the vehicle's axles. The engine on the right propels the second and the fourth axles, while the one on the left propels the first and the third axles. Each engine has its own four-speed gear box with a single-shielded hydraulically controlled clutch and an exhaust. Each axle has its own differential and is hung on transversal torsion bars. The first two axles each have two hydraulic absorbers, while the third and fourth only have one. The first and second pair of wheels can be turned. The gaps between the first and second axles and between the third and fourth axles are even. The gap between the second and third axles is slightly larger than the other ones.
The two-engines setup has an advantage in the fact that each engine could work without the other. This means that if one engine is disabled, it does not affect the other one and the vehicle can still move, albeit with reduced speed. This setup, however, caused several problems that either do not exist in single-engined vehicles or were not as serious: the design itself was complicated and the amount of work that had to be done during exploitation and repair was higher than in vehicles with a single engine. The engines themselves were originally intended for truck use, which meant that they were working in extreme conditions not originally envisioned for them. Because of this, engine breakdowns were frequent. The vehicle also used large amounts of fuel and caught fire easily. Despite all this, the two-engines setup was used in all BTR-60 production models as well as most variants of the BTR-70. The single-engine setup was introduced in the BTR-80.
The BTR-60 is fully amphibious, propelled in the water by a jet centrally mounted at the rear of the hull. It was, however, prone to breakdowns. When not in use, it is protected by the sideways opening lids. Before entering the water, the trim vane at the front of the hull should be erected to prevent water from flooding over the bow. While in its traveling position, it serves as additional lower frontal armor.
BTR-60s were produced by Gorkovsky Avtomobilny Zavod (GAZ). The BTR-60P was produced between 1960 and 1963. The BTR-60PA entered production in 1963, followed by the BTR-60PA-1 in 1965. Both the BTR-60PA and BTR-60PA-1 were produced until 1966. The BTR-60PAI also entered production in 1965, but was quickly replaced in 1966 by the BTR-60PB, which had a better sighting system for the machine guns. The BTR-60PB remained in production until 1976, when it was superseded by the BTR-70. According to Western estimates, around 25,000 BTR-60s were produced by GAZ. During BTR-80 production, and therefore after BTR-60 production had ended, there was a special production run of 100 BTR-60PBs, some of which have been exported to Iraq.
An order to enter the BTR-60P into Soviet Army service was issued on 13 December 1959. However, production did not start until 1960. The first BTR-60Ps were delivered in 1960. It first entered service with the Soviet Army and later the Soviet naval infantry. The BTR-60 entered service with the Soviet military at the time when the USSR was arming on a mass scale. In the early 1960s, it replaced the BTR-152 in the role of the basic APC. The BTR-60P was first seen by the West in 1961. The BTR-60PA entered service with the Soviet Army in 1963, the BTR-60PA-1 and BTR-60PAI entered service in 1965, the BTR-60PB in 1966, the BTR-60PZ in 1972 and the BTR-60PBK in 1975. As newer models of the BTR-60 appeared, the older ones were gradually withdrawn from front-line service. A number of old BTR-60Ps were converted into repair vehicles.
The first use of Soviet BTR-60s during a conflict happened during the Warsaw Pact 1968 Invasion of Czechoslovakia. However, actual combat was scarce.
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