Abstract: A method and apparatus for transferring data across a network protocol bridge is disclosed. In one embodiment, a multi-processing engine configuration is used wherein processing engines are tasked with carrying out specific data transfer operations. In another embodiment, this multi-processing engine configuration is implemented in a protocol bridge in which data is being transferred between Fibre Channel and a network bus that is coupled to a host system. In one embodiment, the network bus is a PCI/PCI-X bus.

Abstract: A root attachment for a rotor blade of a gas turbine engine comprises teeth on the root section of the rotor blade and teeth on the slot of the rotor. The teeth flank surfaces of the teeth on the root section of the rotor blade are arranged at a different angle to the teeth flank surfaces of the teeth on the slot of the rotor. As the load on the rotor blade increases the teeth deflect such that the area of contact between the teeth flank surfaces of the root section and the slot increases to a maximum at the fully loaded condition. The teeth flank surfaces are substantially planar. This enables rotor blade and slot teeth with different stiffnesses to be used for the rotor blades and rotor, for example titanium aluminide turbine blades and nickel base alloy turbine rotor.