Page 17 - Demo

Visible Success
His Majesty King Bhumibol Adulyadej considered that it was possible to make artificial rain because it rains as a result of suitable humidity and temperature, as well as velocity and direction of wind. Therefore, he put a focus on cloud physics as an additional area of study.
2.1 TheInitialPhase
of the Royal Rainmaking Experiments
M.R. Debbrihi Devakul had started since July 1st, 1969 to prepare rainmaking experiments, by looking for a suitable test site, until he heard that there were condense clouds around the Khao Yai area in Pak Chong District of Nakhon Ratchasima Province. He went there to observe and inspect the ground weather conditions. After bringing back information to be analyzed in a laboratory, he was satisfied with the conditions. On July 20th, 1969, he started the first trial flight for chemical seeding in an attempt to induce rainfall on the area of Khao Yai National Park. He used a Cessna 180 one-engine aircraft loaded with dry ice. The aircraft was just a plain one used for insecticide spraying. There was no rainmaking equipment outfitted to the aircraft.
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