0018933 ’ tories were followed throughout the flights by range radar, enabling the impact points to be quickly located by radars on the search aircraft. The cones were then recovered by a rescue craft, One of them was completely dry and the second contained only a few ml, of water. When the cones were disassembled, it was observed that the dry one had maintained a partial vacuum while the other had apparently leaked air to equalize the pressure, In spite of the success of the flight tests, it was felt that still further improvements could be made in sealing the diffuser-filter assembly. A conference was held in August between Cooper and UCRL personnel to investigate new approaches to the problem. After study of the design, it was concluded that moving the forward ball seal NQ-ring” from the forward to aft side of the ball would eliminate several possible sources of leakage, although there would be some sacrifice of performance. Slight leakage had been observed during some of the tests at the rubber boot onthe pushpull red, around the nose cap cable entries and at the forward nose cap blow-off joint. Relocation of the "O-ring" to 2 position aft of these areas was expected to prevent any water which might enter from reaching the filter. All changes in design which had been made at the EPG and later, including the relocation of the "O-ring", were incorporated in a new set of drawings and two new nose cones were manufactured to the revised draw-