Air Filter Sampler.
Final rept. 15 Jun 59-30 Nov 60,
GENERAL MILLS INC MINNEAPOLIS MINN MECHANICAL DIV
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The research described was carried out to improve the field of filter sampling of stratospheric particulate contamination. Two new filter media were evaluated. Sampling systems were designed in which these filter media operate at 100 collection efficiency. Considerable information relative to the performance of centrifugal blowers at stratospheric sampling conditions was acquired. Instrumentation was designed, tested, and flown for the purpose of measuring volume flow rates in flight. Finally, two very satisfactory flights were completed in which a newly designed PR-2 flowmeter was utilized for in-flight volume determination. From the collective results of this work recommendations have been derived which, if employed, will substantially improve the capability to correlate cumulative stratospheric continuation data of future sampling, independent of time, place or sampler employed. Author
- Atmospheric Physics