Rolls-Royce Marine has been a manufacturer of surface vessel steering gear systems for over 50 years. The latter years have seen an increase in the number of ILS requirements from commercial and defence customers. To meet this requirement Rolls Royce are now having to produce an ever increasing amount of data relating to their two main steering gear products, Tenfjord & Frydenbö.
Fulfilling this requirement began with providing reliability data for the two steering gear systems from a component level. MTBF data was gathered from sources such as manufacturers and the NSWC (Naval surface warfare centre reliability handbook). Reliability analysis was conducted in accordance with Mil Std 756. In addition FMEA work was carried out in accordance with Mil Std 1629 for the Tenfjord steering gear system.