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A series of closed bomb combustion tests were conducted on several very high burning rate (VHBR) propellants in which, in addition to the standard pressure measurements, the thrust produced by a burning propellant column was measured using a dynamic force gage located at the end of the propellant column. The results indicate that in several instances the total force imparted to the force gage substantially exceeded that due to the gas pressure alone. The difference is ascribed to the thrust or impulse resulting from very high DD/j FORM AN 73 1473 EDITION OF 1 NOV 65 IS OBSOLETE UNCLASSIFIED SECURITY CLASSIFICATION OF THIS PAGE (When Data Entered)

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The United States Environmental Protection Agency's (USEPA) House Evaluation Program (HEP) is an on-going programme designed to transfer research findings on radon diagnostic and mitigation technologies to the general public. The HEP accomplishes this technology transfer by providing guidance and hands-on training to States, homeowners, and local contractors while conducting radon diagnostics and mitigation design planning in houses. An overview of the HEP is given and the programme's accomplishments and findings to date are discussed.

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