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Aviation History
1940
1940 - 0459.PDF
FEBRUARY 15, Advertisements, TI FIRE FIGHTING IN AIRCRAFT • THE R.A.F.'s NEW AUTOMATIC EQUIPMENT Reproduced by permission of the Illustrated London News •SWITCH TUBNINC OVER. CAUSING ARM TO DROP BV GRAVITY.. & SWITCHES MAKING ICONTACT WITCH IN NORMA LYING POSITION ITIOttWHENW HITS THE GROUND THE TURN-OVER OH GRAVITY OPERATED SWITCH SWITCH IN NORMAL FLYING POSITIONTHE INERTIA ORCRASH OPERATED SWITCH SHOCK DAMPING MfCHiNISM SWINGS FORWARD BY INERTIA WHEN THE CASE STOPS MOVING SUDDENLY RELEASING FIRE EXTINGUISH^ uSH BUTTON OR MANUAL ONTROL SWITCH AIRCRAFT TURNING OVER IN MAKING A FORCED LANDING AIRCRAFT CRASHING OPERATED BY PILOT IN ANY EMERCENCY FIRE FIGHTING EQUIPMENT IN A BLENHEIM BOMBER MANUAL CONTROL SWITCH COPPER CYLINDER CONTAINING METHYL-BROMIDE FIRE-EXTINGUISHER IN ENGINE NACELLE PERFORATED PIPE? (D FOR SPRAYING EXTINGUISHER OVER HOT METAL PARTS OF A ROLLS-ROYCE AERO ENGINE AND INTO CARBURETTORS WHEELS RETRACTED FIGHTING AN INTERNAL FIRE IN A BIG BOMBER BY MEANS OF A HAND EXTINGUISHER ENGINE ON FIRE IN THE AIR AUTOMATICALLY SMOTHERED BY THE OPERATING OF THE FLAME. OR TEMPERATURE SWITCH FLAME SWITCH MOUNTED TO REAR OF ENGINE WHICH COMES INTO OPERATION WHEN SUBJECTED TO FLAME OR WHEN TEMPERATURE EXCEEDS I4O°CENT. AN AVIATION DANGER OVERCOME: THE GRAVJNER SYSTEM OF PREVENTING FIRE WHfiH AN AlfUKAFf CRASHES A new fire extinguishing system, the Graviner, has been adopted as a standard fitting by the R.A.F. Its purpose is to put out fires in the engine compartments if * crash occurs, «nd to enable fires to be extinguished while in flight, or if th« aircraft overturns in making a forced landing. The extinguishing medium used is pure methyl-bromide contained in copper bottles under a high pressure. When this fluid Is discharged, it Immediately evaporates with an intense cooling effect. The engine Is inundated with the chemical, so that hot metal parts become THI GRAVINER MANUFACTURING CO. LTD . FIRST AVENUE instantly reduced in heat below the ignition point of petrol and the fire is smothered. The Graviner system is operated by three simple switches; on?, called the Crash Switch, acts with the speed of a gun the moment an aircraft crashes. The Gravity Switch operates when an aircraft inadvertentl/ turns over In landing. The Flame-Operated Switch comes into action when the temperature round it reaches 150'. The push button control enables the pilot to flood his engine compartments with methyl-bromide just before an expected crash LONDON W.C IHOUSE HIGH HOLBORN
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