SSPH-1 Primus

   The SSPH-1 (Singapore Self-Propelled Howitzer 1) Primus (First) is based on the US M109 155-mm self-propelled howitzer, which is the most widely used system of it's type in the world. The Primus was developed to meet operational requirements of the Singapore Armed Forces. Development began in 1996 and the first prototype was completed in 2000. The SSPH1 Primus is in service with the Singapore Armored Forces.

   The SSPH-1 weights less than 30 tons. It is significantly less than contemporary artillery systems, such as the M109A6 Paladin or AS90 Braveheart.

   The Primus is armed with a turret-mounted 155-mm L39 howitzer, fitted with a semi-automatic loading system. A semi-automatic loading system enables operation with 4 men crew. The SSPH-1 is compatible with all standard NATO munitions. It fires HE, extended-range HE, smoke and illumination projectiles. An indigenous 155-mm cargo round can also be fired. The HE projectile has a maximum range of about 19 km and the extended range projectile of 30 km.

   The SSPH1 Primus has a maximum rate of fire of 6 rounds per minute. It can also make a burst of fire of three rounds in 20 seconds, which gives a shoot-and-scoot capability. It takes less than 60 seconds to prepare vehicle for firing and 40 seconds to leave firing position.

   Primus is fitted with a modern fire control system, which includes an on board positioning and navigation system. It can receive target information form command post or forward observers via datalink. It also offers high fire accuracy.

   It is claimed that armor of the Primus provides protection against 7.62-mm armor-piercing rounds and artillery shell fragments. Vehicle is fitted with an automatic fire suppression system.

   The SSPH-1 Primus is powered by the Detroit Diesel 6V92TA diesel engine, developing 550 horsepower. Chassis uses a number of automotive components from the Bionix IFV. It could be deployed by the future Airbus A400M transport aircraft.