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Pyromechanical components of the highest quality and reliability, for a range of mission critical systems

1 Pyromechanics Delivering global protectionwww.chemring.co.ukDelivering global protection


Pyromechanisms


2 Pyromechanics Delivering global protection

PyromechanismsChemring is a world leader in the design and manufacture of high quality, high reliability, zero maintenance pyromechanical components that meet the demanding requirements of a range of mission critical systems in the Aerospace and Defence markets.

Aerospace Safety Systems PAGE 3

CADs and PADs PAGE 4

Commercial Aerospace PAGE 5

Space PAGE 6

Separation Systems PAGE 7

Missles PAGE 8

Adjacent Products PAGE 10

Capabilities PAGE 1 1

Chemring is the exclusive supplier of pyromechanical components to Martin Baker, the world’s leading manufacturer of ejector seats.Cover: Chemring supplies a number of critical pyromechanical components to NASA and ULA, including those used on the Delta IV rocket.

www.chemring.co.uk


Pyromechanics 3

Aerospace Safety SystemsChemring designs and manufactures a range of highly effective safety systems used in emergency situations including crew egress. These products are supported by our safety testing equipment, including communications and oxygen supply testing.

Aircrew Egress We are the exclusive supplier to Martin Baker, the world’s leading manufacturer of ejection seats, fitted into over 80 different airframes worldwide, including the JSF F-35. We support the entire Martin Baker seat range, supplying a number of complementary products used in their ejection seat deployment systems including, rocket propellant, canopy cords, time delay and actuation devices. High reliability and high performance within the egress sequence is essential. Martin Baker ejection seats, using Chemring components, are fitted to a wide variety of aircraft including: JSF, Typhoon, Rafale, Hawk and Tornado.

Canopy RemovalCanopy cutting cords are used in a variety of military aircraft to assist in canopy break-up and removal, allowing safe escape during the emergency ejection process. Chemring actuators and thrusters are also used in canopy removal.

Analog Recovery SequencerChemring manufactures the Analog Recovery Sequencer for the Advanced Concept Ejection Seat. Our system, fitted into the seat, utilises multiple pyromechanical devices including percussion primers, dual electrical bridgewires, linear explosive lines and hot gas systems to initiate the ACES II ejection seat system.

Other Chemring egress components include:• Time Delay Devices• Parachute Release mechanisms• Ejection Seat Mortar Cartridges• Rocket Charges• Squibs and Electric Igniters

Canopy cutting cords are fitted to the Hawk T1A, operated by the Red Arrows display team. ACES II ejection seat deployment, moments after canopy removal.



CADs and PADsChemring designs and manufactures Cartridge Actuated Devices (CADs) and Propellant Actuated Devices (PADs) used for a variety of functions including crew egress and weapon sub-systems. These products can also be used to start turbines and engines, as part of explosive ordnance disposal systems or for decoy dispersion and missile gyroscope energisation. Actions can be summarised as follows:

• Puncturing containers (e.g. to release high pressure gas)

• Pushing mechanical loads (e.g. opening valves)• Locking a device to prevent rotary or linear motion

• Releasing a device to enable rotary or linear motion• Operating a sprinkler bulb• Operating a switch or delay• Cutting wires or small bolts

Pin Pullers and Pin PushersAlso known as protractors and retractors, our Pin Pullers and Pin Pushers are controlled-release mechanisms used in applications requiring instant detachment of structural fittings, mechanisms, rods, cables, booms or parachutes. After functioning as structural devices and carrying full tensile or shear loads, these products release upon command by an attached Chemring initiator. Full retraction or protraction of the pin is achieved by pressurized gas driving against the piston pin.

ActuatorsActuators are highly reliable, compact single shot devices which can push, pull, cut or shear with a power-to-weight ratio in excess of 10,000:1. They operate within milliseconds of receiving the appropriate electrical impulse, a rate which is almost impossible to achieve with a mechanical source of energy. Actuators are ideal for remote controlled applications.

Ejection Release UnitsCartridge Ejection Release Units (CERUs) provide gas pressure to operate Aircraft Ejector Release Units (EJUs), for stores ejection on combat aircraft.

Gas Generators

Gas Generators are self-contained units that can either be electrically or percussion operated. Typical operating times vary between 25 milliseconds to 250 seconds with operating temperatures in the range of -32°C to + 60°C. Specialised propellants can be incorporated to extend the temperature range from -54°C to +150°C. Typical applications include:• Fluid Displacement• Liquid Fuel Igniters• Pressurisation of hydraulic power supplies• Ejection Release Units• Buoyancy Devices • Inflation of flame retardant fabric structures

Other CAD / PADs• Igniters and Fuseheads• Detonators• Cutters• Explosive Bolts• Release / Low Shock Bolts• Separation Nuts• Detent Actuators

‘Metron’ Actuators. Gas Generators.

www.chemring.co.uk


Pyromechanics 5Chemring supplies critical emergency oxygen release systems.

Sikorsky’s S-76 ‘Spirit’ helicopter, which uses Chemring separators.

Emergency Oxygen System InitiatorChemring’s Emergency Oxygen System Initiator or ‘bottle-punch’ quickly and reliably allows an emergency flow of oxygen to commence as part of the passenger emergency oxygen system. Working with the leading supplier, advantages over existing systems include greatly reduced weight (25% mass of existing systems), lower cost and greater efficiency over existing systems.

SeparatorsChemring supplies Tension Rod separators for use on helicopters, which prevent critical parts from loosening under extreme vibration and temperature conditions.The link and clamp separators are designed to delink the retractable gear doors allowing deployment of the emergency flotation system. The assembly is designed to survive hydraulic fluid, aircraft fuel and salt water environments.Chemring also provides spoiler overide actuators forthe Boeing 767.

Commercial Aerospace Chemring has successfully transitioned to Commercial Aerospace and passenger safety systems, providing critical pyromechanisms for use on-board commercial aircraft. Chemring provides pyrotechnic bottle cutters to initiate the aircrafts Emergency Oxygen system, to enable the immediate release of oxygen from the overhead oxygen supply masks.

Link & Clamp Separator.



Power Cartridges, Squibs & InitiatorsOur power cartridges creates high-heat, high-pressure combustion energy by igniting the pyrotechnic mixture inside a controlled chamber. The power cartridges (aka initiators) are hermetically sealed electro-explosive devices characterized by their compactness, lightness in weight, environment/corrosion resistance and extremely high reliability (.9999).

NASA Standard InitiatorWe have manufactured power cartridges, including the NASA Standard Initiator (NSI) for over 20 years without a single failure. We are the primary qualified source for the NASA Standard Initiator (NSI) used for all initiation functions on the Space Shuttle. The NSI, available only through NASA performs from an incredible low temperature of -420°F to a high of +300°F.

PC-23 InitiatorOur PC-23, the NSI commercial equivalent is used in all other space and defence programmes. Our PC series meet Range Safety Standards for RF & EMI hazards, and 5 minutes 1 Amp / 1 Watt No-Fire test. The PC 117 series meets MIL-DTL-23659.

Actuators & RetractorsOur space qualified pyrotechnic and pneumatic actuators produce motion quickly, accurately and reliably. A pushing, pulling or rotating motion can be supplied for the most complex systems, including inlet door opening, arming/safing, stage separation, stores release/eject, payload release, hatch/door removal or silo door opening.

Power Cartridges, including the NSI and PC-23.

Chemring Actuators, Thrusters and Retractors are used on a number of significant NASA programmes, including the Atlas V.

SpaceChemring is a leading space component supplier, with a 55 year heritage proven through key space programmes, including the Atlas, Delta and Titan family of launch vehicles, space exploration vehicles and satellites. Our products include low shock pyrotechnic satellite separation systems and space-qualified initiators.

www.chemring.co.uk


Pyromechanics 7

Pyrotechnic Separation NutsGeneral features include lightweight, high-load capability, extremely low shock output with complete gas and particle containment. These nuts actuate on very low pressure with large bolt insertion tolerance.Chemring also supplies ultra-low shock separation nuts, using a similar design.

Non-Pyrotechnic Separation NutsWe have developed an extreme low-shock output, non-explosive separation nut. These nuts are actuated by a miniature electric motor on low energy with large bolt insertion tolerance. Unique features include 25 times resettable and reusability and no need for disassembly.

Separation Bolts Our separation bolts are designed and manufactured for use in applications where rapid structure separation is demanded. Chemring’s Separation Bolts have been fully qualified for fairing separation on the ATLAS and DELTA launch vehicles. Bolts do not fragment; rather, they separate into two parts, one of which is ejected from the structure.

Cutters (Bolt, Rod and Cable) Chemring cutters are designed for robustness and can be used in space as well as in deep submergence applications, for cutting reefing lines, electrical cables, steel cables or aluminium, titanium and steel bolts or rods. Over the past 20 years, our cutters have demonstrated high reliability on countless earth-orbital missions. Chemring cutters are built with the option to be single blade or mechanically redundant.

SpaceSeparation SystemsAs a trusted supplier of space qualified components, Chemring products are designed to operate under extreme conditions. Our Separation Systems can reliably undertake a range of mission critical functions, with guaranteed levels of performance and reliability. Such functions might include the release of structures or components such as multi-stage launch vehicles, separation of nose cones and capsules, or the release of booster rockets, tanks and other jettison equipment.

Non-Pyrotechnic Electric Separation Nuts.

Sample range of Separation and Release Units.



Firing CablesLow altitude firing cables that are 360° shielded for EMC/EMI protection.

Piston ActuatorsUsed to crush a fuze, in order to start an explosive train or to arm a Safe and Arm device.

Bridgewire InitiatorsLow voltage, dual hot bridgewire cartridges that initiate numerous components on a platform, including ignition of a gas generator for missile launch.

Separation NutsTo attach the aft of a missile to a shipping canister or capsule launching system and to restrain it until initiation.

Cable CuttersElectrically initiated cable cutters sever electrical cable bundles either prior to launching, or during flight.

High-pressure Pneumatic CylindersThese are used to start a sequence of control surface deployments, such as opening an inlet door to a sustainer motor.

Lug Retraction DevicesUpon actuation of a cartridge, a spring loaded spreading rod extends to retract lugs into the missile body to reduce its radar cross section.

Wing and Tail Retention MechanismsUsed to retain missile wings/tails during storage. Upon actuation, a frangible pin fails allowing missile wings/tails to rotate into a deployed orientation.

Wedge Retention MechanismsDesigned to hold aerodynamic features in place during flight. Upon initiation, features are allowed to release from the missile.

MissilesChemring supplies a wide range of components supporting a number of critical missile, bomb and torpedo programmes across an international military customer base.

The Tomahawk cruise missile uses a number of Chemring components within its launch sequence.

Launch and FlyChemring manufactures actuators, retention mechanisms, motors and weapon release cartridges to enable a range of ‘Launch and Fly’ activities. Typical cartridge operating times are from 0.01 seconds to 10 seconds with operating temperatures from -32°C to +60°C, although specialised propellants can be incorporated to extend the range from -54°C to +150°C. Other valves and separation systems allow fluid/gas flow and enables sequenced launch and fly events.

The Joint Air to Surface Standoff Missile (JASSM) uses a range of flight components, including our wing retention mechanisms, shown above.

www.chemring.co.uk


Pyromechanics 9

MissilesPyromechanical ValvesChemring supplies a number of pyromechanical valves, designed to be lightweight and reliable, which are critical to the liquid and gaseous fluid systems for complex missile programmes. Valves can be either designed in a ‘normally open’ or ‘normally closed’ configuration, which ensures that valve combustion gases are fully contained. Valves are typically associated with fuel flow and are initially designed to isolate fuel during storage, by sealing it within the fuel tank. Upon actuation, these valves allow unrestricted fuel flow to the missile and in parallel, unrestricted flow of pressurized air back into the fuel tank. Our valves are also employed in missile Divert and Attitude Control (DAC) systems.

Safe & Arm Units (SAUs) and Flight Termination Our electro-mechanical safe arm devices provide dual explosive output for remote safing/arming and subsequent initiation of ordnance items. Our fully qualified products are suitable for system use and target drone applications. Chemring designed, developed and qualified the SAD-505 for the US Air Force F-4 target drone. Qualified to MIL-STD-1516, this device provides remote arm and dual initiation for ordnance products. It features remote indication status and remote or manual safing.

Chemring supplies a range of valves to critical missile programmes, including the THAAD (Terminal High Altitude Area Defense) programme.

Chemring supplies a range of Safe and Arm units, including electronic Safe and Arm fuzes for the PAC-3 (Patriot Advanced Capability) programme.



MissilesRelated ProductsChemring also supplies rocket motors, with a strong track record in fuze and warhead design, manufacture and integration. In addition, we offer alternative devices (not based upon pyrotechnics or pyromechanisms) which perform similar functions, such as our electronic firing systems.

Other Electronic SubsystemsElectronic Safe Arm FuzeOur electronic Safe Arm Fuze utilizes an Exploding Foil Initiator (EFI) and is the first fully electronic, range qualified, flight termination system. EFIs provide short, precision firing times. Our system is a dual-mode, single-channel, fully electronic safe arm fuze with a removable keylock assembly. Its function is to preclude premature arming and consequent initiation of the detonator during transportation, handling, pre-launch and launch conditions. It also functions when commanded to terminate flight (missile destruct) during missile fly out.

Acoustic Firing DevicesAcoustic Firing Devices are part of essentially non-magnetic equipment used in the proximity of magnetic influence ordnance. It provides US Navy divers with a safe firing system for underwater demolition operations.

Electronic Safe Arm Unit. Acoustic Fire Code Transmitter Electronics Unit.

Chemring supplies rocket motors and other missile components including warheads to a range of missile programmes including 2.75” air launched rockets and the shoulder launched NLAW.

Rocket Motors and WarheadsWe are a single source rocket motor supplier (launch and flight) to the NLAW (Next Generation Light Anti-tank Weapon) programme. We also manufacture and supply warheads, leading development of Insensitive Munitions and Low Vulnerability Ammunition (IM/LOVA) technology.

www.chemring.co.uk


Pyromechanics 11www.chemring.co.uk


Counter-IED 11

CapabilitiesAdvanced Design & Manufacturing

• Mechanical, electronic and chemical engineers

• CNC lathes with swing to 580mm

• 4 and 5 axis vertical machining centres

• Dual spindle mill / turns

• Thread roller and EDM

• On-site test and inspection facilities

High Quality Assembly (Electronics & Ordnance)

• Spray and dip conformal coating

• Wave and precision soldering

• Laser optics assembly

• Pyrotechnic blending and loading

• Glass-to-metal sealing

• Ceramic grinding

• Welding (TIG, projecting, stitch and laser)

• Precision mechanical assembly

Comprehensive Space Environmental Testing Centre

• Complete in-house testing capabilities

• Dynamics testing

• Climatic testing

• Vibration/shock

• Thermal temperature age testing

• X-ray/non-destructive

• Ordnance test centre

Raw Material Supply

• HMX and HMX formulations

• RDX and RDX formulations

• NTO and NTO formulations

• HNS

• Butyl-NENA and similar NENAs

• IM/LOVA propellants

• Lead Azide



Chemring Group PLCChemring House1500 ParkwayWhiteleyFarehamHampshire United Kingdom PO15 7AFTel: +44 (0)1489 881880Email: [email protected]

© Chemring Group PLC 2012The information in this document is the property of Chemring Group PLC and may not be copied or communicated to a third party or used for any purpose other than that for which it is supplied without the express written consent of Chemring Group PLC. This information is given in good faith based upon the latest information available to Chemring Group PLC; no warranty or representation is given concerning such information, which must not be taken as establishing any contractual or other commitment binding upon Chemring Group PLC or any of its subsidiary or associated companies.

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Pyromechanisms

pyromechanisms - chemring group/media/files/c/chemring-v2/pdfs/sector... · on-board commercial...

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