The Tr-F1 is a 155mm French towed howitzer produced by Nexter (ex Giat Industries) and used by the French army. This rapid-fire 155 mm gun is a double trail configuration with a swivelling platform. Its barrel of 40 calibers is the same one as that is used on the 155 mm AUF vehicle. It delivers 6 rounds per minute and has a range of 24 kms and up to 30 kms with the French base-bleed round. The TR F1 is towed by a 48-round-capacity ammunition truck, fitted with a special hydraulic crane to handle several kinds of ammunition. The maximum range is of 24 km with the high-explosive shells Mle F1, 30 km are envisaged with ammunition with extended range.
A hydraulic mechanism of assistance to the loading of the shell makes it possible to draw 3 shots in 15 seconds, or 6 rounds per minute during 10 minutes, or 120 rounds during one hour. In the event of breakdown of this device, the shooting is still possible in manual loading, but at reduced rate. Secondary armament consists of a machine-gun of 12,7mm on the tractor TRM 10000, and able to carry out anti-aircraft shootings and with ground. A crew of 8 men: 1 commander, 1 pointer, 1 charger, 2 providers, 2 bomb disposal experts, 1 driver. The setting out of battery is carried out in less than 5 minutes, and the output of battery in 2 minutes thanks to the hydraulic system.
