Accession Number : AD0753091

Title :   Design and Construction of a New Cloud Particle Replicator for Use on a Pressurized Aircraft.

Descriptive Note : Final rept. 18 May 70-29 Feb 72,

Corporate Author : NEVADA UNIV RENO LAB OF ATMOSPHERIC PHYSICS

Personal Author(s) : Hallett,John ; Hanaway,Richard W. ; Wagner,Peter B.

Report Date : 31 MAY 1972

Pagination or Media Count : 42

Abstract : A continuous partcle replicator for cloud drops and ice crystals has been constructed for use on a pressurized aircraft, the C130 of Air Force Systems Command, Hanscom Field. A design is described which has the following capabilities: produces a uniform replica over a wide range of aircraft operating conditions; gives eight speeds of film transport enabling the particle concentration on the film to be adjusted depending on the concentration in the cloud and flight speed; gives inflight viewing of the replica; and enables the film to be stopped and started in flight. Preliminary flight results show that at air speeds around 100 m/sec crystals smaller than 100 micrometers and drops smaller than 40 micrometers are replicated without serious problems, larger particles break up or shatter, although larger ice crystals, up to several mm, may still be identified. (Author)

Descriptors :   (*CLOUDS, SAMPLERS), AIRCRAFT EQUIPMENT, WATER VAPOR, ICE, PARTICLE SIZE, COUNTING METHODS

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE