Preproduction Prototype Package Ventilation Kit, Second Structural and Human Factors Test

摘要

A portable ventilation system, designed for fallout shelters, was manually operated continuously for two weeks. The Package Ventilation Kit (PVK) evaluated included a Fan Assembly plus two Drive Modules. A previous test had disclosed some mechanical weaknesses that were subsequently changed. The modified PVK functioned without any failures; therefore, Specification MIL-V-40645, 'Package Ventilation Kit, 20-Inch Fan, Modular Drive (Civil Defense)', was issued 16 August 1965. Minor improvements to this specification are recommended.