Commercial LCM 8 1987

Introducing a remarkable LCU-8 now available on the market, originally built for the U.S. Navy and in excellent condition! This versatile vessel, commonly known as the "Mike Boat," is a robust steel-hulled craft designed for the effective transport of heavy equipment and troops from ship to shore. Specifications: - Length Overall: Approximately 73 feet 7 inches to 74 feet. - Beam: 21 feet. - Displacement: Between 105 to 111 long tons when fully loaded. - Propulsion: Powered by twin Detroit 12V-71 diesel engines delivering 680 hp to dual shafts. - Capacity: Can carry one M48 or M60 tank, or up to 200 combat troops, with a deadweight tonnage (DWT) of 60. - Performance: Achieves a maximum speed of 12 knots when light and 9 knots when fully loaded, with a range of 190 nautical miles. The LCM-8 is designed specifically for short-range ship-to-shore shuttle operations rather than long-distance journeys. Fuel Capacity: - Standard military specification: Approximately 864 gallons. - Commercial/private builds may vary; for instance, a 1972 Gunderson Marine model has a capacity of 640 gallons across two tanks, while some variants have been noted with up to 900 gallons. Range: - With a full load, it covers 190 nautical miles at 9 knots; unloaded, it can go approximately 332 nautical miles at 11 knots. Some modified or civilian versions claim a range of about 400 miles with a 60-ton load. Fuel consumption for the Detroit 12V-71 engine varies based on tuning and load. In a 74-foot vessel like the LCM-8, expect to double the figures for total fuel burn. Hourly Fuel Consumption (Per Engine): - Idle/Low Speed (1,000 RPM): ~5 to 9 gallons per hour (GPH). - Cruising (1,200-1,500 RPM): ~12 to 24 GPH. - High Cruise (1,800-1,900 RPM): ~40 to 54 GPH. - Wide Open Throttle (2,100-2,300 RPM): ~65 to 80 GPH. To calculate trip costs, consider these variables: - Standard Efficiency: Approximately 1 gallon per hour for every 20 horsepower produced. - Twin Engine Total: For steady 10-knot cruising (around 1,200 RPM), expect a combined burn of roughly 25 GPH. - Engine Type: Turbocharged models are typically more fuel-efficient per horsepower than naturally aspirated versions. Note: Running the engines below 1,300 RPM for extended periods may lead to incomplete combustion and carbon buildup. For example, a 50-nautical-mile trip at 10 knots (5 hours) would consume around 125 gallons of diesel at 25 GPH. Additional Specifications: - Dimensions: 74' x 22' x 4' with a hydraulic bow ramp. - Built by Bender Shipbuilding, Alabama. - Gross tonnage: 95 tons, Net tonnage: 76 tons. - Hull depth: 9'. - Cabin headroom: 7', Engine room: 6'. - Shell plate thickness: 1/4", Bulkhead thickness: 1/4". - Steering: Hydraulic. - Propellers: 34" x 24". - Fuel capacity: 900 gallons. - Fuel consumption: 12 GPH.

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