Home Products Systems Services About Us News Contact Back Enquire Horstman InArm® InArm® has the lowest weight and space claim of all armoured vehicle suspension systems and provides a growth path to advanced variable damping, lock-out and ride height management systems Product Overview Developed by Horstman in the mid-1990s initially for the UK MODs Future Scout Cavalry System (FSCS) Tracer and US Army’s Future Combat System (FCS) programs, InArm® is designed to eliminate the need for torsion bars and to minimize or eliminate road arm penetration of the vehicle hull. This allows the vehicle designer to overcome the internal packaging constraints, minimize the external packaging constraints, and overcome vulnerability to mine blast and crew exposure to the fragmentation that results from torsion bars. The hydro-pneumatic suspension uses high-pressure nitrogen gas and an integral oil damper that are all contained within the road arm. This reduces weight and space compared to other hydrop, HSU or coil solutions. Designed as the most efficient packaging space solution, InArm® provides a growth path to advanced variable damping, lock-out and ride height management systems. Enquire Product Datasheet Feature Benefit Torsion bars removed from the inside of vehicle Additional space for equipment, ability to have a floor mounted emergency escape hatch Reduced fragmentation effects from secondary projectiles from mine blast or IED blast Integrated system approach saves mass Integration of damper and gas spring inside road arm minimizes space claim Simpler than a torsion bar system which needs separate road arms, bump stops, dampers, torsion bar attachments and protective tubes. Independent suspension mounted externally Damaged units can be replaced more easily than bent or seized torsion bars Reduced hull machining without precision alignment between left and right side of vehicle Lower vehicle height / survivability Ability to lower the turret basket and reduce the height of the vehicle gives improved survivability (lower silhouette). The saving of the hull side armour is typically 100-500kg Upgrade path to advanced suspension features Upgrade path to ride height, lockout and semi active damping Wheeled Application Tracked Application ATV CAV Tactical Towed 6x6 8x8 Mining Agri <24T 25-35T Special 36-90T Options Variable damping, up to full hydraulic lockout Rising rate spring as standard – dual spring / secondary volume options Ride Height, vehicle pitch (kneeling) Transport lock Active Damping Thermal compensation Accessories Charging kit and Nitrogen Charging – HydroboosterTM External Lockout (engineering / special role) Wheel hub, lightweight wheels, wear guards, bump stops Related Applications CONTACT HORSTMAN We’re always happy to talk through our services in more detail. To find out more information, please get in touch. Email: information@horstmangroup.com More Contact Info ABOUT HORSTMAN About Horstman Careers History Trade Compliance Contact Horstman on Linkedin Horstman on Twitter LATEST NEWS 15 Nov - Horstman Wins Multi-Million Pound Contract in Support of British Army Read More 18 Oct - Horstman Wins Multi-Million Pound Contract in Support of German Army Read More 27 Apr - Horstman Selected to Provide Gearboxes in Support of the British Army’s Boxer Mechanised Infantry Vehicle Programme Read More LEGAL INFORMATION UK Specific Information USA Specific Information Canada Specific Information © 2021 Horstman Defence Systems Ltd | Part of Horstman Holdings Ltd. | Registered in England No: 01511975 Created by stellasoft We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept”, you consent to the use of ALL the cookies. However you may visit Cookie Settings to provide a controlled consent. Cookie settingsACCEPT