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HIGH SPEED LIGHTERAGE ASSULT CONNECTOR

HIGH SPEED LIGHTERAGE ASSULT CONNECTOR. JOINT SEABASED THEATRE ACCESS WORKSHOP FEBRUARY 9-10 2005. Dan McCluskey NAVFACHQ. Agenda. Current Lighterage Future Lighterage Requirements Seabasing Requirements R&D Efforts Questions. NL - Legacy

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HIGH SPEED LIGHTERAGE ASSULT CONNECTOR

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  1. HIGH SPEED LIGHTERAGE ASSULT CONNECTOR JOINT SEABASED THEATRE ACCESS WORKSHOP FEBRUARY 9-10 2005 Dan McCluskey NAVFACHQ

  2. Agenda • Current Lighterage • Future Lighterage Requirements • Seabasing Requirements • R&D Efforts • Questions

  3. NL - Legacy Speed – 3 Kts Capacity – 205 LT <1 ft freeboard INLS 2005 to 2025 Speed – 10 Kts Capacity – 300+ LT 4 ft freeboard Current Lighterage

  4. Future Lighterage Requirements N42/N75 tasked Sealift Support Program Office (SSPO) to evaluate next generation lighterage to support MPF(F) and SeaBase

  5. SEABASING REQUIREMENTS • Transport 1 Mechanized Battalion Landing Team to the beach in an 8 hr period from a distance of between 25 and 100 nm. Air Surface Future-TBD Strategic Airlift Strategic Sealift APOD INTRA-THEATER CONNECTORS (ADV BASE-SEABASE) SPOD CONUS High Speed Sealift (HSS) Sea Base INTER-THEATER CONNECTORS (CONUS-SEABASE) Military/Commercial Re-supply Austere SPODs Shuttle Ships High Speed Connectors (HSC) Intermediate Log Source Joint Operations Area Advanced Base Strategic Airlift Heavy Lift Aircraft Strategic Sealift Sea Base leverages forward deployed, pre-positioned, and surge force posture. Arrive ready with scalable air, maritime, and ground forces on accelerated timelines.

  6. Lighterage R&D Efforts • Need to increase lighterage speed • Speed requirements need to be determined based on distance and number of craft to be carried • Study conducted by NSWCCD Combatant Craft to increase speed of INLS causeway ferries • Study completed Oct 04 • Approaches • Increased main propulsion power • Change from 360o waterjet to conventional propellers • Reduce wave making resistance - bow shape improvement • Reduce frictional resistance - air cushion options

  7. Lighterage R&D Efforts • Analysis – Larger Main Engines • Increasing the engines from 800 hp to 1200 hp will increase the speed approximately 1 knot

  8. Lighterage R&D Efforts • Analysis – Change to Conventional Propellers • More efficient than waterjets • Will increase speed by about ½ knot

  9. Total Resistance Frictional Resistance Lighterage R&D Efforts • Analysis – Reduce Resistance Friction • Frictional resistance is only a small portion of total resistance • Large resistance due to gaps between the modules

  10. Lighterage R&D Efforts • Need to reduce total resistance by using air cushion hull form • Partial Air Cushion Support Catamaran (PACSCAT) chosen • Designed for Moderate Speed and Moderate Payload vice High Speed Low Payload for other concepts (ie surface effect ships) • Concept designs used same dimensions as INLS • Would require hull shape redesign • Analysis then Model Testing of PACSCAT INLS

  11. Lighterage R&D Efforts • PACSCAT Model Testing of Modified INLS Hull Shape

  12. Lighterage R&D Efforts • Results of Model Testing • Speed at full load increased by only 1 knot using PACSCAT technology • At full load, the PACSCAT was operating at too high a cushion pressure • Large resistance caused by gaps between modules. Future would require methods to cover gaps • Larger craft (92’ X 28’) would reduce cushion pressure and increase speed

  13. Future R&D Efforts • Determine seabasing mission requirements re speed and payload • Evaluate single hulled craft vice connected barges • Look at various methods to increase speed to meet mission requirements, ie hull form, propulsion • Look at various options to launch, ie FLO/FLO, LO/LO, Preposition • Evaluate INLS Floating Causeway as a portable/beachable pier to permit offload of intra-theater connectors near the beach without requiring an intermediary platform • Continuation of a multiyear SBIR contract • Concept Development and Design • Prototype Detailed Design • Prototype Production and Test

  14. Questions

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