a 12-cylinder diesel engine developed by the German company MTU. When the EFV is swimming the powerplant can be boosted to via the use of open circuit seawater-cooling. Such extreme war power setting allows the MTU engine to drive four massive water-jet exhausts which propel the surface-effect riding EFV vehicle at sea speeds reaching . Although the EFV prototypes demonstrated revolutionary performance on water and land, the reliability of their extremely boosted powerplants never met stringent military standards and the vehicle failed to enter Marine Corps service. Boost systems Water injection MW50 (German, methanol/water mixture) GM 1 (German, nitrous oxide injection) Forsazh (Russian) Propane injection See also Afterburner Flank speed References Aircraft propulsion components