Commanding Officer, NAVFACCO Bldg 41 Code 27, NCBC 1000 23rd Ave, Port Hueneme, CA 93043-4301

28 -- ENGINES FOR M/V INDEPENDENCE @ THE NAVAL FACILITIES ENGINEERING COMMAND SERVICE CENTER SOL N47408-98-R-7527 DUE 091498 POC Peggy L. Hake, (805) 982-5397 E-MAIL: SMTP Gateway @ Net Svsc SMTP, plhake@cbcph.navy.mil. QUESTION: The specification does not require the replacement of the coupling. We need to know the brand and the specification of the coupling that is to be reused with the new engines. With that information we will then be able to budget for the torsional test. Based on the information provided it is possible that the coupling is not compatible with new engine and must be replaced. ANSWER: CLIN 0001 is revised to include the following additional requirement for two (2) each couplings. P/N: VL 3411-2800/18. Specification: Torque continuous (lb-ft) 4649; Torque max. (lb-ft) 14022; Torque Vibr. (lb-ft) 1845; Power loss (KW) 0.275; Max Speed (RPM) 2400; Displ. Radial (in) 0.060; Radial Stiffness (x1000) (lb-ft) 15.4; Torsional Stiffness (x100000)(lb-in/rad) 0.381; Relative Dampening 0.75. The contractor will be responsible for supplying engines with a SAE #0 flywheel, which will mate to the above VL coupling. This VL series coupling will directly mate to the existing Twin-Disc reduction gears input coupling. The contractor will perform the torsional test and determined that the above VL coupling is the appropriate choice for their candidate engine. If the above coupling is not appropriate the contractor shall select and provide the appropriate Vulkan Vibration coupling to suit the application, while maintaining the same mating connection to the existing Twin-Disc reduction gear input flange. Posted 09/04/98 (W-SN246553). (0247)

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