New jet engine engine muffler is tested at Farmingdale, Long Island.
Unused / unissued material - dates and locations unclear or unknown.
New muffler noise on jets. Long Island in the United States of America (USA).
L/S and M/S Jet plane on airfield. L/S and M/S muffler at rear end of jet, being closed over. L/S jet plane, with rear end in muffler. M/S muffler. M/S as jet muffler, the engine starts.