WMOD00317

• Contract/Permit #: 14-06-D-6999
• Project Name: CAWRP
• Title: Cascades Atmosphere Water Resources Program - Volume I
• Prepared For: US Department of the Interior Bureau of Reclaimation
• Date: 7/1/1970
• Weather Modification - Doc Type: Report

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TABLE 1. 5

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ESTIMATES OF MAXIMUM IMPACT SPEEDS WHICH NATURAL ICE CRYSTALS CAN WITHSTAND
WITHOUT FRAGMENTATION trnEN THEY COLLIDE WITH A MYLAR FILM COATED WITH A

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WET 4% SOLUTION or FORMVAR IN CHLOROFORM 150 ~m THICK.

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. t Maximum Dimensions Maximum Impact Speed I
Type of Crystal
of Crystal (llm) in tnph at which I
Crystal Remains Intact,
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Stellars and Den~ites 3000 20 ,
(PIb, Plc, Pld, Ple, Plf) I
Thin hexagonal plates (PIa) 1000 30
Thick plates (Clg, Clh) 1500 1,60 I
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f'
Solid columns (Cle, Nle) 3000 60
Hollow columns (Clf) 3000 40
Needles (Nla, NIb, N2a) 3000 20 I

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tBased on classification by Magono and Lee (1966)

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