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Old 11-06-2013, 10:32 AM   #13
Phil Fill
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City: Everett Wa
Vessel Name: Eagle
Vessel Model: Roughwater 58 pilot house
Join Date: Oct 2007
Posts: 2,919
The Eagle has a hydraulic get home. The gen set Perkins engine drives the hydraulic pump which drives the hydraulic bow thruster but the lines can be switch to drive the get home. The get home is connected to the main shaft with a sprocket chain drive. The gen set is set at a fixed 1800 rpm, so the hydraulic pumps is varible psi from 0 to 1500 psi that is controlled by a cable from the pilot house. The pump also has an electric drive, so when no used it free spins. I have connect the get home only once and we got some head way, maybe 3 to 5 knots.

The hose is rated to 3000 psi and the and bow thruster hydraulic drive to 2500 psi. The limiting factor is the gen set engines HP. When we bought the Eagle the hydraulic pump had the electric clutch but a fixed PSI. The sudden PSI made the hoses jump which made me jump, so changed the hydraulic pump to a variable psi, and re sheaved the gen set to maximize the hydraulic pump RPM and PSI. The sytem has a 15 gallon reservoir tank so the pump can run for hours at a time.
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