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  • Author or Editor: W. W. Grotewold x
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Theodore W. Cannon and Walter W. Grotewold

Abstract

Drop generators have been developed at NCAR based on the “wire egression” principle. They are outstanding in their flexibility and simplicity. Drops ranging in diameter from 6 μm to 1 mm have been generated with one model. Application of the generators to calibration of NCAR particle cameras and the PMS Forward Scattering Spectrometer Probe (FSSP) as well as applications to cloud physics laboratory research are described.

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C. A. Knight, N. C. Knight, W. W. Grotewold, and T. W. Cannon

Abstract

Impacts of hydrometeors on aluminum foil over a grooved backing, as in standard airborne foil impactors, have been produced in the laboratory using a modified crossbow to achieve aircraft speeds. The purpose of the work was to test the ability to distinguish the phase of the hydrometeors from the nature of the imprints. Solid, spherical ice pellets (frozen drops) and drops of slush leave impressions that are often indistinguishable from those left by liquid drops, at sizes below about 3 mm diameter.

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