|Category:||Head-Mounted Equipment [HMD/NVG/Glasses]|
|Year of Manufacture:||Unknown|
|Location:||Archive Object Store|
The Mk.4A Flying Helmet is current Royal Air Force / Royal Navy / Army Air corps issue and superseded the Mk.3C helmet in the 1980`s. The shell is made of glass fibre impregnated with polyester resin and lined with shock absorbing expanded polystyrene; the interior is fitted with a multi-point adjustable webbing harness system with adjustable independently suspended earcups. The helmet has a locking clear inner blast visor and a friction mounted outer tinted visor with a detachable cloth visor cover, avionics consist of twin 300ohm speakers giving an impedance of 150 ohm (1khz) terminating with a 18" downlead and single pin NATO jackplug, mounting blocks allow the fitting of hooks for the P or Q type oxygen mask. The Mk.4A has locating holes allowing the fitting of RAF or similar Boom Mikes. The manufacturer is probably Helmet Integrated Systems Ltd.