Maritime Companies Insurance H&M (Hull & Machinery Insurance) P&I Club (Protection & Indemnity) FD&D (Freight Demurrage & Defence Insurance)	Maritime Companies Crewing Manning Employment Recruiting (List)
Maritime Companies Logistics Chartering Forwarding	Maritime Companies Vessel Survey Ship Cargo Inspection P&I
Maritime Companies Brokers Ship Cargo S+P Chartering Brokers Insurance Brokers Customs Brokers	Maritime Companies Port Services Stevedoring Tally Cargo Handling Storage Warehousing Distribution
Maritime Companies Law Legal Average Adjusting Legislation Arbitration Solicitors Advocate Attorneys	Maritime Companies Finance Accounting Processing Financial Management Investments Management
Maritime Companies Port Liner Shipping Agencies	Maritime Companies Shipyards Shipbuilding Shipyards Agencies Contractors
Maritime Companies Consulting Safety Audit ISM Code ISPS Code Flag Registration	Maritime Companies Insurance Marine Insurance Intermediaries Adjusters Attorneys Investigators Casualty Managers

Enter your search terms Submit search form   Web www.best-maritime.info

Page 1 of 1           [Back to companies list]

Founded in 1963 by Philip Rolla, Rolla Propellers offers a wide variety of services, consultations and designs, including: performance and power prediction for displacement and planning craft; propeller design; estimation of complete hydrodynamic characteristics of the propeller geometry, and propeller cavitation characteristics through exclusive lifting surface and panel method programs; manufacturing of propeller models; model basin tests in the Berlin University cavitation tunnel and at the IMHEF cavitation tunnel at Lausanne; full scale tests; propeller re-calculation and redesign for existing vessels; designing and manufacturing of propeller prototypes and pre-series; designing of conventional and unconventional propulsion systems; and consultation on propulsion problems. -------------------------------------------------------------------------------- Sophisticated CFD codes are used to solve the Navier-Stokes equations with free surface, providing the possibility to perform "numerical towing tank" analysis, for any kind of hull (displacement and planing). Computations are performed using a powerful Silicon Graphics Origin 2000 multiprocessor computer. -------------------------------------------------------------------------------- All Rolla propellers are designed to be dedicated to a particular craft's projected operational profile by using the Rolla proprietary lifting surface and panel method programs, and are manufactured using the Catia CAD/CAM program. A Rolla-associated manufacturing facility is able to mill propellers up to (9.8 ft.) (3 m) in diameter with a five axes MECOF M 1000 milling machine and Rolla Q.A. is supported with a unique computerized coordinate measuring machine to provide full "Class S" specifications. -------------------------------------------------------------------------------- As part of its ongoing dedication to research, in 1993 Rolla became a founding member of the MIT/Navy/Industry Consortium on Cavitation Performance of High Speed Propulsors. One of the principal objectives of the consortium was to develop efficient computational optimization techniques for the automated design, in the presence of cavitation, of innovative high speed propulsive configurations. -------------------------------------------------------------------------------- The Rolla families of stainless steel and NiBrAl surface piercing propellers include lines specifically designed for all major Surface Drive Systems. The results Rolla obtained at the Technische Universitat Berlin constitute the first systematic series of surface propellers available in the world and permit the company to supply the torque and thrust coefficients, efficiency, horizontal and vertical force figures for different shaft inclinations and propeller immersions. All Rolla propellers are designed to be dedicated to a particular craft's projected operational profile by using the Rolla proprietary lifting........ Rolla SP Propellers SA