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Quantification of the Thermal Environment for Air-Launched Weapons.

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Test and evaluation rept.,

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The specific goal has been to provide the tools and techniques necessary to allow project engineering or management personnel to tailor the thermal environmental criteria to their programs parochial needs. To do this it is necessary to combine the specific every hour thermal excursions of many different ordnance items into a generalization of events with a resulting probability of happening. In this way, the true risk that attends the choice of a set of thermal design values is revealed to the person who makes the choice and ultimately to the program manager who is fully responsible for the design criteria. The data on which to base the rational thermal design goals required by the DOD 5000 series of instructions and MIL-STD-1670 may be available. The traditional practice of blindly assigning -65F to 165F or more extreme values for all development programs can stop based on measured, quantified fact. The risk taken by a program when assigning any set of design temperatures can be quantified. The thermal exposure risk of a waiver to the design specification can be evaluated on a scientific basis. The thermal exposure risk can be weighed against the gain in performance os simi-risky design concepts. Efforts should now concentrate on developing a DOD handbook of event versus temperature displays for Army, Navy, and Air Force use covering ship-launched, air-launched, infantry, and helicopter assault missions. This effort will require considerable support to assure a speedy and accurate publication. In addition, all air-launched weapons program thermal criteria should be reevaluated against the existing event-temperature data.

Subject Categories:

  • Ammunition and Explosives
  • Thermodynamics

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