M5 half-track

The M5 half-track (officially the Carrier, Personnel, Half-track, M5) was an American armored personnel carrier in use during World War II. It was developed in 1942 when existing manufacturers of the M2 half-track car, and M3 half-track could not keep up with production demand. International Harvester (IH) had capacity to produce a similar vehicle to the M3, but some differences from the M3 had to be accepted due to different production equipment. IH produced the M5 from December 1942 to October 1943. Using the same chassis as their M5, IH could produce an equivalent to the M2, which was the M9 half-track. There were also variants of the M13 and M16 MGMCs based on the M5. The M13 and M16 were exported to the United Kingdom and to Soviet Union respectively. The M5 was supplied to Allied nations (the British Commonwealth, France, and the Soviet Union) under Lend-Lease. After WWII, the M5 was leased to many NATO countries. The Israel Defense Forces used it in several wars and developed it into the M3 Mark A and the M3 Mark B. The specifications of the M5 were almost identical to the specifications of the M3 half-track. It was 20.8 feet (6.3 m) long, 7.3 feet (2.23 m) wide, 9 feet (2.74 m) high, and had a gross weight of either (M5) or (M5A1). It had vertical volute springs for the tracks and semi-elliptical longitudinal leaf springs for the wheels. It was powered by a 142 hp (106 kW) IHC RED-450-B, 451 cubic inch (7,390 cc), 6-cylinder engine, with a compression ratio of 6.35:1. It had a fuel capacity of 60 US gallons (230 L), a range of , and a speed of 42 miles per hour (68 km/h). It had constant mesh transmission, 6.5–13.5 mm (0.26–0.53 in) of armor, one 0.5 in (12.7 mm) M2 machine gun and two 0.3 in (7.6 mm) M1919 machine guns, and crew of three with up to ten passengers. The track was an endless rubber-band track which was made of molded rubber over steel cabling with metal track guides. After the attack on Pearl Harbor, the demand for U.S. produced armored vehicles grew and the existing production capacity was stretched by the need to equip the expanding U.