P-40 1S12 Long Track 3D UH Early Warning & Acquisition Radar
 
 
 
 
Description
The P-40 or 1S12 (NATO reporting name "Long Track") is a 3-D UHF radar developed and operated by the former Soviet Union. The P-40 was developed by Scientific Research Institute #208 GKRE, which later became known as NIIIP of Minradioprom, OKB-588 (later Lianozovskiy Electromechanical Plant, LEMZ) also assisted in the production of the prototype. The P-40 started development in 1960 and by 1962 the radar had completed state trials and in 1963 was accepted into service by the anti-aircraft troops of the Soviet armed forces. In 1965 the P-40 gained the GRAU designation 1S12 as it was adopted as the target acquisition radar of the 2K11 Krug (SA-4 Ganef) mobile anti-aircraft defence system. The P-40/1S12 was the primary acquisition radar for the 2K11 Krug (SA-4 Ganef), although the radar was often used to provide track data for other battlefield SAM systems.
 
Variants:
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Technical Data
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Radar
The P- 40 Long Track radar uses an open frame truncated parabolic antenna with a stacked antenna feed The antenna is mounted at the rear of the tracked chassis. The radar capable of being folded for stowage during transit. Azimuth was determined by mechanical scanning while the angle of the target is determined from within which beam of the antenna stack the target is detected. It has a maximum range of about 370 km. The P40 radar is also equipped with EDM which offers protection against active and passive jamming.
Design and protection
The front part of the P-40 vehicle is fitted with a four-man cab mounted a tracked chassis ATT-426U which is of all-steel construction, having a door either side. The rear part of the vehicle is fitted with a large shelter which includes all the electronic components and the crew to detect and track aerial targets at a range of 70 km at an altitude of 500 m, 150 km at an altitude of 6 km and 180 km at an altitude of 12 km. The P-40 had a crew of 6 and a total weight of 35 tons, the radar being powered by a gas turbine running 400 Hz generator.
 
Inside view P-40 Long Track Radar
Mobility
The P40 Long Track radar is mounted on the chassis of on a lengthened ATT-426U version of the AT-T heavy artillery tractor with a large shelter mounted at the rear of the vehicle. The vehicle is motorized with 12-cylinder 4-stroke diesel engine with an output of 342 kW (465 hp) and it can run at a maximum road speed of 55 km/h. The suspension is of the torsion bar type and either side consists of seven large road wheels with the drive sprocket at the front and the idler at the rear. There are no track-return rollers.
 
Specifications
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Radar
3-D UHF radar
Country users
Armenia, Azerbaqijan, Bulgaria, Kyrgyzstan, North Korea, Turkmenistan, Ukraine.
Designer Country
Russia
Accessories
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Crew
6
Range radar detection
370 km maximum
Altitude radar detection
12 km maximum
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Speed vehicle
55 km/h
Range vehicle
200 km
Dimensions
Length: 9.7 m; Width: 3.2 m; Height: 4.1 m
 
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Pictures - Video
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