preres oo Magy bitin Project 7,1-17/RS(CC)-8 - Test of Efficiency of Field Collective Protector \ The collective protector in an OCE structure was sheared from the inlet pipe when the structure turned over and consequently failed to collect a sample, The only positive information obtained fran this project is that the filters were undamared by the blast pressure at this specific distance and that the equipment would probably have operated satisfactorily,if the structure had remained upright. The other collective protector in the boat dowmvind sank prior to the test, Its removal from the 1000 foot structure did not involve the loss of F any information since the blast would have prevented obtaining any data concerning the 1000 foot structure. ‘Two new collective protectors were obtained for installation in the ICM dovmrind in tests Yoke and Zebra, Project 7o1-17/RS(CC)--9 « Particle Size of Material in Cloud Despite the fact that CCE structures were moved a considerable distance the impactors operated properly and collected samples of dust stirred up by the explosion. No final correlation with particle size has yet been mide since it is planned to study the slides with an electron microscope at Edgewood, Md, <A cascade inpactor will be placed in an LOM located dowmvind about 2500 yards and also one ina drone plane at 16,000 feet for test Yoke. Project _7el17/RS-10 . Thermal Radiation Papers Only a few samples of Dr. Penny‘s paper on the plyboard squares were not burned, In test Yoke the papers will be placed at sreater distances than at test X-Ray in order to obtain additional points, ~ 1] « mo Bae petege SE seYE(EERE ERS ee fs , wet fos yi:RNRAGE,ARt He tot ee at Beer