i January 1958 to 31 January 1958 Subcontract No, 108, Appendixes B, C, and D this informal monthly progress report is the third of a series submitted in partial fulfillment of Subcontract No. 108. The information is regarded as preliminary and subject to further verification and analysis. I, Delivery Forty-eight ASP motors, 96 Loki motors, 5 moedified leunchers, and 18 new leunchers have been shipped to the Pacific Proving Grounds. One modified launcher is still at WSPG. It. Blectrenics Fifteen programmers have been built, and 45 more are in production. Some modification of the design was necessary after the programmer was flown in the test vehicles, but other tests yielded good results. design of the sequence firing equipment is complete. being made, and no design changes are anticipated. Preliminary Prototype units are Twenty-four launcher boxes and five master control boxes will be built. III, WindTunnel.Tests The operational characteristics of the diffuser-filter assembly were ebserved in a wind tunnel test conducted on 30 January at the NACA Ames Aeronautical Laboratory. Results were even better than expected, fully confirming the design calcvlations. The records are expected to arrive from Ames by 14 February, and a report on the test will be forwarded when the data have been analyzed.