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A blisk (portmanteau of bladed disk) is a turbomachine component comprising both rotor disk and blades as a single part instead of a disk assembled with individual removable blades. Blisks generally have better aerodynamics than conventional rotors with single blades and are lighter.
The turbine blades have a golden colour in this engine cutaway. A turbine blade is a radial aerofoil mounted in the rim of a turbine disc and which produces a tangential force which rotates a turbine rotor. [2] Each turbine disc has many blades. [3] As such they are used in gas turbine engines and steam turbines.
A "Product Improvement Package" was developed to rebuild and update the M809 series into the M939 series. A new cab and hood are spotting features, but there were also other improvements. In 1982 AM General, who built all M809s, began rebuilding M809s into the M939 and M939A1 series at their South Bend, Indiana plant. They would rebuild 24,100.