Sisu RA - 140 DS Sisu RA - 140 DS " Raisu " is a flail - type demining vehicle developed and produced by the Finnish company Sisu - Auto and later produced by Patria Vehicles in 1994 – 2001 . The production totalled 41 pieces . Development . Designing work of a new demining vehicle began in 1986 and the first prototype was ready in 1990 . The basic structure was borrowed from SA - 110 prototype but it was heavily modified to suit to its purpose . Technology and design of Pasi was utilised in development of the armoured cabin . Sisu military vehicles typically have a nickname in addition to the official model name . The vehicle nearly got a too puerile nickname " Misu " which means " kitty " or " pussycat " . It was derived from " Miina - Sisu " ( " Mine Sisu " ) , and it was already printed on some brochures . However , the Engineering department quickly changed the name to " Raisu " , from " Raivaus - Sisu " ( " Clearance Sisu " ) . Raisu also means " boisterous " . Production . Production of RA - 140 DS took place in Hämeenlinna and it was the last Sisu developed there . Four vehicles were produced for Danish Defence in years 1996 – 1997 , the rest were handed over to different brigades of Finnish Defence Forces . Operation and characteristics . RA - 140 DS is intended for clearing of mine fields from surface placed or conventionally buried non - directional mines set against infantry and sparsely placed anti - tank mines up to 10 kg . It can clear a suitable passage for a vehicle convoy . Raisu is not meant for combat missions . The mine clearing tool includes 82 hammers which are fastened to a rotating flail by chains . In operation the vehicle is used by reverting to ensure the best protection for the crew . The driver and passenger are protected against the pressure and mine fragments by a protection shield next to the flail . The vehicle makes a 3 . 4 - metre wide path and the clearing depth can be controlled manually or automatically . The maximum speed in operation is 6 km / h and Raisu can eliminate mines up to 10 kg of explosive . The clearing flail is turned longitudinally and mounted on the top of the vehicle for during transportation . The maximum gradient is 60 % and side slope 30 % . The highest vertical step the vehicle can climb is 0 . 5 metres and the trenching capability is 0 . 6 metres . The maximum fording depth is 0 . 8 metres . Raisu ' s cross - country mobility is good and it can be quickly moved to a new site . This is a key benefit compared to conventional , heavier tank - based applications . Technical data . The vehicle is powered by air - cooled six - cylinder Deutz BF 6L 913 C turbodiesel engine . The gearbox is a four - speed automatic Renk Doromat 874 AM / PTO . The front axle is portal type and sprung with coil springs . Both axles are driven and equipped with lockable differentials . The front axle has got disc brakes and the rear axle is with drum brakes . When in service , the vehicle is driven by hydraulic transmission which is also using the flail and lifting or lowering an armoured - steel - made deflector shield between the flail and vehicle . The flail rotating speed can be infinitely adjusted between 0 – 500 rpm . The armoured cabin contains seats for the driver and commander and is designed with NBC protection and to withstand a 10 kg explosion under the vehicle . The armour protects agains 7 . 62 calibre bullets . A 2061 VHF radio is for communication . The wheels are mine and bullet resistant . There is an option to mount a 12 . 7 - calibre machine gun . A self - recovery winch is fitted as standard . Operational history . The four vehicles of Danish Defence were used in the former Yugoslavia . The vehicles faced severe problems in Bosnia and therefore the Danish army placed their further mine clearing vehicle orders for domestic made Hydrema 910 MCV . Finland has used Raisu ' s in UN missions .