Home Linear Cable Engines DOHB/Diverters Cable Transporters Control & Instrumentation Power Packs Products - Naval Products - Offshore Customer Support Contacts	Capstan Drum Engines have been engineered to lay and recover cables at speeds up to 8 knots with breakout tensions of up to 45 tonnes. The systems deployed offer a wide range of options, to meet specific customer requirements. Fleeting Rings Fleeting rings (Pick up and Pay out) provide the maximum support to the cable during fleeting, reducing fleeting stresses and thus protecting the cable and enabling greater laying or pick up speeds to be achieved compared with the standard fleeting knife arrangement. Continuous laying speeds of 8 knots can be achieved using fleeting rings and a drum low friction bearing design.
	Accurate Tension Measurement Integral Load Sensing Measurement automatically enables accurate measurement of cable tension during all cable laying and repair tasks in normal sea states. Electrical Drive Systems (DC or AC) enable the cable machinery performance characteristics to be tuned to meet specific operator requirements in terms of response and sensitivity. It provides fine speed and tension control and is a more energy efficient means of using the ships available electrical power. Low Outboard Tensions Low Tension Render Capability automatically drives one or more of the drum engine motors with just sufficient power to overcome the drum engines internal friction characteristics and draw off/hold back load, thus allowing laying with very low outboard tensions.
For more information	Typical specifications Diameter 4.0 metre (or upon customer request) Pulling Force 20-40 tons typically Stepless cable speed 0-310 m/min (0-10 knots) Repeater Joints dia max 400 mm Pick up/Pay Out   Brake tension 40T Drive A.C. Drive or Hydraulic Weight - 2 motor approx. 45T   - 3 motor approx. 48T FleetingRing and/or knife combinations   Mounting to deck 4 x 500mm² mounting pads The Drum Engine and Draw Off-Hold back unit are 100% synchronised through the control system to minimise the risk to the cable. Advanced self-contained, closed loop hydraulics and an oil filled common gearbox for all drum engine motors provide a system characterised by low noise and high reliability. Mounted on linear bearings, accurate tension readings are obtained via the load-cells. This sensitive control system automatically reduces the drive unit's torque at low outboard tensions. Cable Handling equipment does not get any more sophisticated than this.