Rolla's New Five-Bladed REXP5 Propeller Represents Breakthrough In Design

Rolla SP Propellers, Novato, Calif., internationally known for designing and producing a wide selection of advanced technology and high-performance wheels, has introduced a fast new 5-bladed geometry stainless steel propeller, the REXP5, intended for transcavitating, supercavitating and surface piercing applications.

The REXP5 propeller represents a revolutionary breakthrough in propeller design, also made possible by the investment casting process.

With inedited cambered sections, extreme radial pitch variance, annexed trailing edge along with 120- degree BAR, the last tests of the REXP5 propellers on a 7-plus deep- V hull with twin 450-hp diesels and propellers in surfacing condition gave a speed of 60+ knots and overall performance as to planing time, cruise condition, reverse and off design conditions that, according to the manufacturer, can be considered remarkable.

Investment cast in 17-4-PH stainless steel or ERO (a new stainless steel developed by Rolla for propellers which are both strong and completely resistant to marine environments) up to 22.6-inch-diameter and 1.36 PD ratio, the REXP5 is the first of a completely new family that will cover the future needs of very fast vessels.

Technical specifications are as follows: propeller, REXP5; type, FL5 RH/LH and OS50/51 RH/LH; construction materials, stainless steel 17-4-PH and ERO; number of blades, 5; description, 15-degree cleaver; diameter, up to 22.6 inches; pitches, 30-31 inches; any bore; splines, Z-25, Z-26, Z-31; applications, transcavitating, supercavitating and surface piercing; design, Rolla SP Propellers; construction, Rolla SP Propellers.

For further information and free literature from Rolla SP Propellers, Circle 119 on Reader Service Card C i r c l e 7 7 o n R e a d e r S e r v i c e C a rd

Maritime Reporter Magazine, page 38,  Mar 1989 New York

Read Rolla's New Five-Bladed REXP5 Propeller Represents Breakthrough In Design in Pdf, Flash or Html5 edition of March 1989 Maritime Reporter

Other stories from March 1989 issue

Content

Maritime Reporter

First published in 1881 Maritime Reporter is the world's largest audited circulation publication serving the global maritime industry.