Designed for high performance with low power consumption, the Airscrew MP4 range of Mixed Flow fans has non-stall performance and non-overloading power characteristics, together with low noise emission levels. The backward-inclined impeller blades are manufactured in cast aluminium alloy and are particularly suited for use in dusty conditions as the blades remain clean, thus avoiding loss of efficiency. With any fan application the geometry of the individual installation can influence final performance; the details shown here represent results achieved when tested to BS 848 conditions. Of compact robust construction, and manufactured to meet the requirements of Government defence equipment specifications, these units are especially suitable for military vehicle engine-cooling applications. Depending on the complexity of the installation, mounting methods can be adapted to suit individual requirements. With hydraulic, belt or shaft drive options the MP4 range has the flexibility to solve virtually any engine-cooling problem.