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The History of Propeller Dynamics with the US, Australian and Canadian Navies

The Australian Navy like any boat or ship owner was at the mercy of the propeller manufacturers. The manufacturers used their measuring equipment, their techniques, their standards, and their interpretation.

After much investigation it became evident that Prop Scan could do the job and the Navy asked us to incorporate ISO 484 International Standards to create an independent inspection system that would establish a level playing field for the Navy and it's suppliers.

The first Prop Scan incorporating the ISO 484 International Standards was put to the test on the Navies new Fremantle Class Patrol Boat propellers. The FCPB propellers were a new innovative design with very large overlapping blades. These propellers provided the ultimate test for Prop Scan.

Two models of Prop Scan were developed for the FCPB propellers. The RTAF-1.5 and the RBUMA-1.5. The RTAF was a workshop unit used to perform the final inspection on the FCPB propellers. Divers used the RBUMA-1.5 underwater to quickly detect damaged propellers.

This achievement filtered through to other Navies and the RBUMA-4.3 (measures 14 feet diameter propellers underwater) was developed for the Canadian Navy who was having problems with their new Frigate and wanted an independent inspection system.

Next was the US Navy who contracted us to produce an underwater system to measure four of their destroyer and frigate class vessels. Prop Scan was to be tested under the US Defense Foreign Comparative Program. This test took two years and cost $740,000. The conclusion was that Prop Scan was well within the tolerance requirements set down by the US Navy.

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