Indal Twin Claw (TC-ASIST)
An intelligent claw capture system for non-probe installed aircraft
While Indal ASIST (Aircraft Ship Integrated Secure and Traverse) is a popular system for those navies that have probe-equipped helicopters, for some navies the option to install a telescoping probe on their existing helicopters is difficult. In order to support non-probe installed aircraft, Curtiss-Wright has developed the Indal Twin Claw (TC-ASIST) system, a derivative of its already proven and successful ASIST system.
The TC-ASIST system provides full security after landing and through all on-deck operations, up to and including Sea State 6 conditions. The pilot, assisted by visual cues, flies the aircraft to a position over the designated landing area on the flight deck. The Indal Rapid Securing Device (RSD), fitted with a pair of claw arms designed to capture and secure the wheel spurs of the aircraft, tracks the helicopter position with the capture arms at a ready position at either end of the RSD. The claw arms are spring loaded and held in the down position until tire sensors contact each tire as the arms are brought in. Upon contact, spring force rotates the claw arm upwards until it contacts the wheel spur. Each claw arm acts independently, but they are mechanically interlocked to ensure simultaneous operation.
Once the aircraft is secured, it is ready to be aligned/straightened for traversing from the designated landing area to the hangar or any intermediate location. All deck handling operations can be accomplished without the need for personnel on the flight deck.
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- 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: Computer Simulation of Recovery Assist Constant Tension Cable System for Helicopter Landing on Combatship
- 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 provided at all times|
|Recovery Assist||Optional ASIST style helicopter tracking system available to supplement standard deck cues and line up lines
100% free-deck landing
|Capture Area||3~4 m2 [typical]
Compatible with harpoon deck-lock grid
|Maneuvering and Traversing||Achieved through single operator controlled movement of Rapid Securing Device along deck track
Constant helicopter lateral positioning maintained during traversing
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