Abstract: A device for the manufacture of a frozen aerated product which includes a freezer, a pump for introducing a frozen aerated product mix and air into the freezer, a tubular crystallizer system having upstream and downstream ends and having a longitudinal shaft within and extending beyond the ends of the crystallizer system through seals, a ram for reciprocating the longitudinal shaft upstream and downstream, the longitudinal shaft being provided with one or more scrapers in a transverse plane along its length which divide the crystallizer system into compartments, whose perimeters are adjacent to and capable of scraping the internal wall of the crystallizer system and whose bodies are provided with at least one longitudinal channel, a high pressure stuffing pump for feeding the frozen aerated product from the freezer to the crystallizer system, a jacket containing a heat transfer fluid for removing heat from the frozen aerated product within the crystallizer system, and a backpressure valve for conveying the fr

Abstract: A tank temperature sensing network for propellant powder contained within e tank, said network employing resistors and a field effect transistor for putting out a voltage to a summing amplifier proportional to target range and powder temperature, the amplified voltage being fed either into a computer through a detector set at a predetermined reference voltage for correcting ballistic lead angle when said amplified voltage is less than the detector reference voltage or to trigger a fail light when the amplified voltage is greater than said predetermined detector reference voltage.