USCGC HEALY (WAGB 20) Results of Performance and Special Trials

Performance and Special Trials consisting of standardization, fuel performance, tactical, and maneuvering trials were conducted on USCGC HEALY (WAGB 20) during builder's sea trials to evaluate the hydrodynamic performance of the ship, The trials were conducted in the Gulf of Mexico off the coast of Louisiana from 23 through 31 August 1999. Standardization and fuel performance trials results showed that HEALY achieved the maximum powering conditions of an average shaft speed of 148.4 rpm, a total shaft torque of 725,000 lbf-ft (983, 000 N-m), a total shaft power of 20,500 hp (15,300kw), and a total fuel consumption of 1,005 gal/hr (3,806 liters/hr) with a ship speed of 16.40 knots. The trials were accomplished at a displacement of 16,412 LT (18,152 tonnes). For ship speeds between 8 and 16.8 knots (the minimum and maximum speeds tested during the tactical trials), HEALY has a tactical diameter of 3. 1 ship lengths or less when using a rudder angle of 35 degrees. Results of the tactical trials shows that HEALY has similar tactical dimensions whether turning to starboard or to port. The maneuvering trials consisted of lateral stability, horizontal overshoots, and low speed controllability trials. The lateral stability trials results show that HEALY is directionally stable. The horizontal overshoot results also indicate that HEALY responds similarly using right and left rudder. Results of the low speed controllability trials indicate that the controllability of HEALY is significantly reduced at speeds below 6 knots.Naval Surface Warfare Center Carderock Div Bethesda is the author of 'USCGC HEALY (WAGB 20) Results of Performance and Special Trials' with ISBN 9781423534501 and ISBN 1423534506.