Ellicott Dredges Ellicott Dredges
  Swinging Dragon™ Specifications
Swinging Ladder Dredge - Swinging Dragon™ Swinging Ladder Dredge - Swinging Dragon™

Newly Designed
Contractor Quality 
Articulated ladder with high head hull pump

General Length - with Ladder - overall 56'-6" 17.2m
Width - Hull, operational 15’-3” 4.65m
Width - Shipping, overall 10'-6" 3.2m
Height - Overall (without spuds) 11'-6-1/2" 3.52m
Height - Overall (shipping) 10'-0" 3.05m
Dry Weight (estimated) 51,000 lbs 23.2 tonnes
Average Draft (estimated) 2'-4" 0.71m
Fuel Capacity (3" Air Space)
(Two independent fuel tanks)
250 U.S. Gallons 950 litres
Hull Length 49'-4" 15.04m
Depth 3'-6" 1.07m
Width 10'-0" 4.65m
Built-in Ballast Tanks at four corners
Minimum Exterior Steel Plate Thickness 3/16" 4.8mm
Four (4) Lifting Lugs for Lifting Complete Dredge
Diesel Engine John Deere Model 8.1 L6081HF070  Turbocharged Diesel Engine -Radiator Cooled
Continuous Power Rating 375 HP @ 2200 RPM 280 kW
12V DC Electrical System
Engine Control Panel with Digital Read-Outs in Operator's Cab
Sound dampening enclosure
Dredge Pump 8" Diameter Suction x 8" Diameter Discharge - Hull Mounted
19.5" Diameter 3-Vane Impeller - Thread Mounted on a Heavy-Duty Shaft
Wet End Parts (Impeller, Casing, Suction Cover & Replaceable Rear Liner) - 28% High Chrome Alloy Cast Iron (600 BHN Minimum)
Oil Lubricated Bearing Assembly with Lip Seal
Rope Packing on Pump End with Water Flush
Anti-Friction Roller Bearings for Thrust and Radial Loads
Typical Operating Point-3,000 GPM @ 150' (45.7m) of Head (water) @ 1132 RPM
Efficiency @ Typical Operating Point 77%
Maximum Sphere Size 3.625" 92mm
Cutter Head Cutter Diameter 31” 787mm
Number of Blades 6
Cutting Blade Edges Replaceable Blades
Shaft Diameter 2-1/2" 64mm
Torque Rating 31,500 lb/inch 2,560N-m
Speed Range 0-40 RPM
Cutter Horsepower 40 30kW
Cutting Force 4,000 lbs 1,815kg
Cutting force per Linear Inch of Edge 64 lbs 11.43kg/cm
Dredge Range Minimum Digging Depth 2'-4" 0.61m
Maximum Digging Depth 15' 4.57m
Width of Cut @ 2'-4" Digging Depth 22'-0" 6.7m
Width of Cut @ 15' Digging Depth 18'-3" 5.5m
Ladder Swing Cylinder Nominal Size 6" Bore x 18" Stroke 152mm x 457mm
Rod Diameter 2-1/2" 64mm
Style Connecting Rod End(s)
Burst Pressure 7,500 PSI 51.7MPa
Operating Pressure 2,500 PSI 17.2MPa
Ladder Hoist Cylinder Nominal Size 6" Bore x 30" Stroke 152mm x 762mm
Rod diameter 2-1/2" 64mm
Style Connecting Rod End(s)
Burst Pressure 7,500 PSI 51.7MPa
Operating Pressure 2,500 PSI 17.2MPa
Kicker Spud Cylinder Nominal Size 6" Bore x 10" Stroke 152mm x 254mm
Rod diameter 2-1/2" 64mm
Style Connecting Rod End(s)
Burst Pressure 7,500 PSI 51.7MPa
Operating Pressure 2,500 PSI 17.2MPa
Spud Hoist Winches Type High Performance, High Efficiency, Planetary Hydraulic Winch
Line Pull 2,200 lbs. 998 kg
Line Speed (Up and Down) 83 FPM 25.3 MPM
Maximum Operating Pressure 2,500 PSI 17.2MPa
Wire Rope Diameter and Type 1/2" - 6x19 Galvanized Wire Rope 12.7mm –
152 x 483mm
Hydraulic Systems Pump Drive Double Pump - Engine Direct Drive
Circuits Dredge Pump (Closed Loop)
5,000 PSI (34.5MPa) Max continuous rating
5,500 PSI (38MPa) relief pressure setting
Cutter Head & Auxiliary
2,500 PSI (17.2MPa) continuous rating
2,800 PSI (19.3MPa) relief pressure setting
Circuit Type(s) Dredge Pump - Closed Loop Hydro-Transmission
Auxiliary Controls - 8 bank proportional directional control valve(s) 
  Hydraulic Fluid Biodegradeable green A/W 68
Operator's Cab Construction Steel galvannealed sheet wrapper with steel tubular frame, sound attenuating foam insulation on walls and ceiling, and tinted safety glass windows. Bi-fold door on both sides of cab. Windshield Wiper and Horn
Heating/Cooling Roof mounted air conditioner with hot water heater and fan
Engine Control Panel Diesel engine control panel with read-outs including speed control, tachometer, oil pressure, coolant temperature, high temperature and low oil pressure shut-down
Controls Individual "Finger Tip" Control Switches:
- Dredge Pump - On/Off and Speed
- Cutter Head - Fwd/Off/Rev and Speed
- Ladder Swing Cylinder - Starboard/Off/Port and Speed
- Ladder Hoist Cylinder - Up/Off/Down
- Starboard Spud Hoist - Up/Off/Down
- Port Spud Hoist - Up/Off/Down
- Kicker Spud Hoist - Up/Off/Down
- Kicker Spud - Fwd/Off/Rev
- Service Water - Pump On/Off
Lighting Front and Rear work Lights
Interior Cabin Light
Instruments Gauges:
- Slurry Pressure & Vacuum Gauges (Dial Type)
- Hydraulic Pressure Gauge, Dredge Pump Circuit
- Hydraulic Pressure Gauge, Cutter Head Circuit
- Hydraulic Pressure Gauge, Auxiliary Circuit(s)
Options Windshield Wiper and Horn
Dredge Positioning System
Production Meter
Suction/Discharge Relief Valve
Safety Equipment Two fire extinguishers, two life vests, and life ring.
Coating System All surfaces contacting liquid in the waterway are sandblasted and given two coats of coal tar epoxy having a minimum film thickness of 12 mils (DFT). All other surfaces are primed and coated with two coats of urethane enamel having a combined minimum film thickness of 4 mils (DFT). The cab, diesel engine, hydraulic pump drive, hydraulic components, etc. have their original OEM coatings.

These specifications are representative of a typical swinging ladder dredge design, but are subject to change at manufacturer's discretion when necessary to update the product, and to provide the best available technology that optimizes dredge performance, improves quality, and best satisfies our customers' needs.


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