Expansion Foam Fire Suppression System High expansion foam (HEF) is a specialized firefighting foam designed to rapidly expand and fill large spaces, such as aircraft hangars, ship holds, or industrial facilities, to suppress fires effectively. It is particularly useful for areas where traditional water-based suppression systems might be impractical or insufficient. Credits: #tech #technology #engineering #innovative #reels | Tech Moments

A clip from 1974 demonstrating the effectiveness of aqueous foam as a means of muffling explosions. The foam is deployed from a modified fire engine around a 'car bomb', with the narrator explaining the process. You can find the full film - which documents the Royal Armament Research and Development Establishment's research into ways in which a bomb can be quickly contained - on our film collections website here: https://bit.ly/3NFr3yJ Film: IWM MIL 255 | Imperial War Museum London