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Langford, B., Stark, G.W. and Rasbash, D.J., 1962. CONTROL OF FIRES IN LARGE SPACES WITH INERT GAS AND FOAM PRODUCED BY A TURBO-JET ENGINE PT. V THE PRODUCTION OF HIGH EXPANSION FOAM. Fire Research Notes 511
Tests with small scale apparatus indicated that foam could be produced at an expansion of about 1000:1 from solutions of detergents under conditions simulating generation with the inert gas generator. Tests of foam production with the inert gas generator showed that foam could be produced with good efficiency with the generator delivering about half its maximum output of inert gas. A foam making screen in the form of a sock of open mesh absorbent cotton fabric was used. The efficiency of production increased as the uniformity of the gas stream through the foam-making screen increased.