braking system. Common Tactical Truck (CTT); previously Next Generation Future Truck (NGFT) Parallel to the FHTV 4 extension effort, the U.S. Army's Heavy Tactical Vehicles (HTV) PEO CS&CSS issued on 20 July 2020 Notice ID W56HZV-20-R-0237, a Request for Information (RfI) for the Next Generation Future Truck (NGFT). Responses were due by 24 August 2020 for what was quickly renamed the Common Tactical Truck (CTT). It is the intent that CTT will replace the HEMTT, plus the PLSA1 and M915 Truck Tractor, Line Haul. The Army desires five variants of the NGFT/CTT, and all with the option to perform semi-autonomous or autonomous operations. The five variants currently mooted are: a wrecker to recover Stryker, MRAPs, and other tactical wheeled vehicles up to 40 US tons; an LHS Heavy variant with crane to transport flatrack with up to 16 tons of cargo payload; a Tractor variant operable with the M870, M871, M172, M872, M967 tanker, M1062 tanker, future tanker (8,200 gallons), and commercial standard trailers; a Tanker variant with a 2,500 gallon threshold or objective fuel payload greater than 2,500 gallons; and a Cargo variant with crane capable of carrying a payload of up to 22 tons or greater. Description The HEMTT's objective is to provide heavy transport capabilities for supply and re-supply of combat vehicles and weapons systems. Compared to earlier generation 5-ton trucks in U.S. Army service it offers increased payload and mobility. The HEMTT is available in a variety of configurations, including cargo, tanker, tractor and wrecker. The HEMTT was developed from the outset as a tactical truck, but to minimize procurement and life cycle costs included militarized commercial automotive components where possible, these including the engine and transmission. Some components used in early HEMTTs are common with the Oshkosh Logistics Vehicle System (LVS) vehicles which were supplied to the U.S. Marine Corps. With the exception of the M984 wrecker variant (254 × 89 × 9.5 mm, front; 356 × 89 × 9.5 mm, rear), on all HEMTT variants the chassis is formed of 257 × 89 × 9.5 mm heat-treated carbon manganese steel with a yield strength of 758 MPa. Bolted construction with Grade 8 bolts is used throughout. A centrally mounted self-recovery winch is an option and this is fitted to around 20% of production. The HEMTT's two-door forward control cab seats two. It is of heavy-duty welded steel construction with corrosion-resistant sheet metal skins. Simula