Recovery Assist, Secure and Traverse System (RAST)
Navies around the world rely on Curtiss-Wright's Indal RAST (Recovery Assist, Secure and Traverse) system to support ship borne helicopter operations. RAST conducts the securing, maneuvering and traversing tasks with a single Rapid Securing Device (RSD) that is never disconnected from the helicopter while it is on deck. RAST is able to accommodate a wide range of helicopters, even in the most demanding marine environments up to sea state six.
The typical operation of the Indal RAST system begins with the pilot making a normal approach to the flight deck and establishing a hover. The messenger cable is lowered to the deck and is manually connected to the main recovery assist tethering cable, which is then hauled up to the helicopter and automatically locked into the main RAST probe. During a period of quiescence in the ship's motion, the pilot requests the LSO to apply tension to the recovery assist cable. This tension produces a strong centering effect to stabilize the hover and directs the helicopter toward the designated landing area, as the pilot slowly flies the craft down. Immediately upon touchdown, the LSO closes the RSD's arresting beams securing the helicopter probe. The aircraft is ready to be aligned and traversed into the hangar.
The Indal RAST system has been continuously improved. The latest versions employ advanced, solid-state electronic subsystems and ultra lightweight components and tracks. Systems can be provided in a "palletized" form to simplify shipboard installations.
More than two hundred ship sets have been delivered to navies in Australia, Canada, Japan, Spain, Taiwan and the United States.
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- Naval Handling Systems
- White Paper: Computer Simulation of Recovery Assist Constant Tension Cable System for Helicopter Landing on Combatship
- White Paper: Securing and Handling Helicopters Onboard Ships, Essential Factors for Meeting Safety and Operational Requirements
- White Paper: Curtiss-Wright Developed New Time Domain Ship Motion Program for High Sea State Conditions (SPLAShMo)
- White Paper: Investigation of Ship Flight Deck Motion Limits for Safe Embarked Helicopter Operation
- White Paper: Importance of Random Frequency Spacing in Ship Motion Simulation
- White Paper: Methodology for Ensuring Safety of an Embarked Helicopter Securing System Probe Installation
- White Paper: Parametric Investigation of the Sensitivity of Shipboard Helicopter Securing Requirements to Helicopter Configuration
- White Paper: Development and Validation of an On-Deck Helicopter Manoeuvring Simulation
- White Paper: Effects of Flight Deck Configurations and Conditions on Helicopter Securing Requirements at Landing
- White Paper: Development, Validation, and Application of the Dynaface Helicopter/Ship Dynamic Interface Simulation Software Package
- White Paper: Fatigue Life Estimation of Helicopter Landing Probe Based on Dynamic Simulation
- White Paper: Correlation between Time-domain Calculations of Helicopter Securing Probe Forces and Frequency-domain Calculations of Ship Flight Deck Motions towards Determining the Effect of Multidirectional Waves
- White Paper: Ship Flight Deck Motion Parameters for Ensuring Safety of Helicopter Operation
- White Paper: Modelling and Simulation of Skid-equipped Shipboard Rotorcraft
- White Paper: Investigation of the Relationship Between Helicopter Geometrical and Inertial Parameters and Shipboard Securing Requirements
- White Paper: Fatigue Analysis of Helicopter Landing Probe by Helicopter/Ship Dynamic Interface Simulation
- White Paper: Simulation Tools Used in the Analysis of Aircraft Handling Systems for Safe Embarked Operation
- White Paper: Extending UAV Operating Envelopes
|General||Provides positive, uninterrupted securing at all times|
|Recovery Assist||Landing dispersion controlled via mechanical Recovery Assist cable connection from ship to helicopter|
|Capture Area||1 m2|
|Maneuvering||Achieved via external auxiliary wheel winch cables|
|Traversing||Achieved through controlled movement of Rapid Securing Device along deck track.
Constant helicopter securing and lateral positioning maintained.
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