Slipway and Stern Entry Systems

slipway and stern entry systems

quad wheel drive units

Model: PQBS Model: PQBS

Model: PQBS

Read more
Model: PQBS-T Model: PQBS-T

Model: PQBS-T

Read more
Model: PQBS-T-P Model: PQBS-T-P

Model: PQBS-T-P

Read more
Model: PQBS-D Model: PQBS-D

Model: PQBS-D

Read more
Model: PQBS-D-P Model: PQBS-D-P

Model: PQBS-D-P

Read more
Model: PQBS-D-S Model: PQBS-D-S

Model: PQBS-D-S

Read more
Model: PQBS-T-D-P

Model: PQBS-T-D-P

Read more
Model: PQBS-D-C

Model: PQBS-D-C

Read more
Model: PQBS-R Model: PQBS-R

Model: PQBS-R

Read more
Model: PQBS-SR-E-P Model: PQBS-SR-E-P

Model: PQBS-SR-E-P

Read more
Model: PQBS-E-P Model: PQBS-E-P

Model: PQBS-E-P

Read more
Model: PQBS-MB-B Model: PQBS-MB-B

Model: PQBS-MB-B

Read more

SLIPWAY AND STERN ENTRY SYSTEMS WITH QUAD WHEEL DRIVE UNITS

The hydraulic powered, semi-automatic slipway system consists of a number of wheel drive units (quad units) in two (or multiple) rows that rotate on axes to automatically adapt the slipway to the hull shape of daughter craft during launch and recovery operations.

Daughter craft can engage the slipways at a range of speeds, up to 7 knots higher than the speed of the mother vessel with some systems. When a boat enters the slipway, the overrunning clutches allow free rotation of the wheels in the recovery direction until the boat speed and wheel drive speeds match.

At that point the hydraulically powered wheel drive units take over under single-operator control and dock the daughter craft safely inside the slipway. End stoppers automatically set the craft in parking and stowage positions and engage failsafe brakes on the wheel drives.

MAX. SEA STATE FOR SLIPWAY OPERATIONS

The structural strength of the system is high and is normally not the limiting factor. Test and operational use of PALFINGER MARINE‘s slipway systems have been performed in Sea States above 7 with the mother vessel steaming ahead at low speed.

Safe operations at high Sea States are highly dependent on:

  • Mother vessel heading and speed
  • Mother vessel responsiveness (RAO Profile)
  • Waves and wind pattern
  • Boat driver’s skills

QUAD WHEEL DRIVE UNITS

Wheel drive unit configuration:          4 wheels on each wheel drive unit
Brakes:                                                     1 for each wheel
Hydraulic motors:                                  1 for each wheel
Over-running clutches:                         1 for each wheel
Number of quad wheel drive units:    Depending on length of slipway
Length of quad wheel drive units:      1526 mm
Width of quad wheel drive units:        960 mm
Wheel diameter:                                     Ø 600 mm (Foam filled)
Wheel drive units tilt mechanism:      2x Bearing arrangement
Wheel drive unit tilt range:                   +/-20°
Max. freewheel speed, inlet:                0-240 m/min (0-7 knots)
Max. freewheel speed, outlet:             0-35 m/min (0-1.1 knots)
Drive assist speed, in and out:             0-25 m/min (0-0.8 knots)
Max. depth for installation:                   2 meter below water surface
Max. load, each wheel:                          4 tons
Weight (each wheel drive unit):           Approximately 725 kg

Single wheel drive units

Model: PSWS-SR Model: PSWS-SR

Model: PSWS-SR

Read more
Model: PSWS-T-D Model: PSWS-T-D

Model: PSWS-T-D

Read more

SLIPWAY AND STERN ENTRY SYSTEMS WITH SINGLE WHEEL DRIVE UNITS

The hydraulic-powered, semi-automatic slipway system consists of a number of single wheel drive units in parallel rows. The tilt, height and distance between the wheels can be manually adjusted to conform to a range of daughter craft hulls.

Daughter craft can engage the slipways at a range of speeds up to 7 knots higher than the speed of the mother vessel. When a boat enters the slipway, the overrunning clutches allow free rotation of the wheels in the recovery direction until the boat speed and wheel drive speeds match.

At that point the hydraulically powered wheel drive units will take over under single-operator control and dock the daughter craft safely inside the slipway. End stoppers automatically set the craft in parking and stowage positions and engage the fail-safe brakes on the drive wheels.

MAX. SEA STATE FOR SLIPWAY OPERATIONS

Test and operational use of this slipway system have been performed in Sea States 3 with mother vessel steaming ahead with low speed.

Safe operations at higher Sea States may be possible but is highly dependent on:

  • Stern entry arrangement
  • Mother vessel heading and speed
  • Mother vessel responsiveness (RAO Profile)
  • Waves and wind pattern
  • Boat driver’s skills

SINGLE WHEEL DRIVE UNITS

Wheel drive unit configuration:               1 wheel on each wheel drive unit
Wheel angle and transverse spacing:    Manually adjustable
Brakes:                                                          1 for each wheel
Hydraulic motors:                                       1 for each wheel
Over-running clutches:                              1 for each wheel
Number of single wheel drive units:       Depending on length of slipway
Wheel diameter:                                          Ø 434 mm (Foam filled)
Max. freewheel speed, inlet:                    0-240 m/min (0-7 knots)
Drive assist speed, in and out:                 0-25 m/min (0-0.8 knots)
Max. slipway slope angle:                         up to 12°
Max. payload for slipway:                          up to 12 tons
Max load, each wheel:                               2 tons
Weight (each wheel drive unit):               Approximately 420 kg

Boat Cradle 

Model: PSEC Model: PSEC

Model: PSEC

Read more

SLIPWAY AND STERN ENTRY SYSTEMS WITH BOAT CRADLE

The boat cradle is an open and light tubular steel design, which minimizes forces induced by waves and currents. The boat cradle is supported by mechanical load bearing support/drive rails and wheel/bearing arrangements on both sides of the boat cradle structure.

The inside of the boat cradle is fitted with fenders to protect and guide the water craft during launch and recovery. A weaklink mechanism protects the boat cradle against higher forces than it is designed to withstand. The “bow section” of the boat cradle is fitted with an automatic mechanical securing clamp. The clamp is hydraulic operated and equipped with a quick-lock
function.

The stern end of the boat cradle is designed for easy and safe access during launch and recovery and to avoid any conflicts with daughter craft’s drive system. The system is also well suited for handling of crafts with multiple outboard engines or stern drives.

BOAT CRADLE DRIVE SYSTEM
Rails on each side of the boat cradle serve as guide and support mechanisms for the boat cradle while it is travelling up and
down the slipway slope. One of the guide rails on each side of the slipway slope is fitted with a tooth rack for the drive system.

Longitudinal movements and heave/lowering of the boat cradle is done by hydraulic powered pinion drives mounted on each side of the boat cradle. The hydraulic pinion drive motors are fitted with automatic overrunning clutches, allowing residual energy from the water-craft to be transferred into forward motion of the boat cradle in case the water-craft is approaching the boat cradle with excess speed.

BOAT CRADLE ELEVATOR

Vertical movements are driven by the two mechanical support and guide rails on each side of the boat cradle. The mechanical support and guide rails (located on the stern of the vessel) guide the boat cradle to the horizontal parking position when the boat cradle is retracted by the rack and pinion drive system.

MAX. SEA STATE FOR SLIPWAY OPERATIONS

This system is designed for operation in Sea State 3.

Safe operations at higher Sea States may be possible but is highly dependent on:

  • Mother vessel heading and speed
  • Mother vessel responsiveness (RAO Profile)
  • Waves and wind pattern
  • Boat drivers skills

SYSTEM BENEFITS

Safe operation:
PALFINGER MARINE’s slipway systems eliminate the need for; lifting,
hooking, mechanical connection or use of painter lines and arrester wires during LARS operations, significantly reducing the risk of dangerous situations and accidents occurring during launch and recovery of daughter crafts.

PALFINGER MARINE’s slipway systems are designed for increased safety by implementing close guiding in all phases of launch/recovery. This reduces the risk of damage and accidents caused by collisions between daughter craft, mother vessel and handling equipment.

Regardless of whether the daughter craft is manned or not, PALFINGER
MARINE‘s slipway systems eliminate the need for manual support or interaction from the boat crew during launch and recovery.

Crew and passenger comfort:
Launch and recovery operations with PALFINGER MARINE slipway systems are designed to be safe, comfortable and easy, even in harsh weather conditions.

The drive wheel units ensure a very harmonic and “gentle” load distribution to the boat hull, which ensure a smooth and seamless transition in and out of the slipway. Launch and recovery by use of rubber drive wheels also protect the hull of the daughter craft and serves to extend its life-time.

Operational envelope, systems performance and speed
PALFINGER‘s slipway systems eliminate the need for complex tasks and highly coordinated efforts from multiple crew members during launch and recovery operations. This increases safety of operations as well as the operational weather envelope and speed of operations. PALFINGER‘s single-operator slipway system are very easy and intuitive to use, enabling vessel personnel to become proficient operators in a short period of time.

Unmanned crafts:
PALFINGER MARINE’s slipway systems can handle unmanned crafts such as Unmanned Surface Vehicles (USV’s) and Autonomous Underwater Vehicles (AUV’s)

Versatility:
PALFINGER MARINE’s slipway systems can handle crafts with di‰erent
hull shape, propulsion system and weight. PALFINGER MARINE’s slipway systems can handle multiple crafts and transfer crafts from the slipway to a stowage position on the mother vessel.

Rules and regulations:
Slipway systems are normally not categorized as lifesaving equipment. As such, certification and inspections regime in accordance with SOLAS rules would normally not be applicable.

As the system eliminates the need for lifting of free-hanging loads, certification and inspections regime in accordance with rules for lifting appliances would normally not be applicable.

 

DAUGHTER CRAFT, VESSEL, AND APPLICATION RANGE

      Daughter Craft Range

  • Patrol boats
  • Rigid inflatable boats
  • Fast rescue boats
  • Crew transfer boats
  • Work boats
  • Daughter crafts
  • Life boats
  • Unmanned surface vehicles
  • Underwater vehicles
  • Autonomous water vehicles
  • Special water vehicles
  • Catamarans

 

      Vessel Range

  • Offshore vessels
  • Expedition cruise vessels
  • Offshore fish farm vessels and installations
  • Wind farm service operation vessels
  • Government and law enforcement vessels
  • Special vessels and offshore installations

      Application Range

  • Patrol and interception
  • Shuttle services
  • Standby and rescue
  • Oil recovery
  • Lifeboat recovery
  • Crew transfer
  • Military operations
  • Cruise expedition operations
  • Operations on/off unmanned vessels
  • Operation of unmanned water crafts