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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />was designated to do cloud-base seeding. This aircraft was based <br />at Dodge City Airport and was equipped with wing mounted pyro- <br />technic flares and acetone-silver iodide solution generators. <br /> <br />C. Seeding Materials <br /> <br />Two types of droppable pyrotechnic cartridges were used <br />by the cloud-top seeders. One Aztec was equipped with a Carley, <br />96-position rack which used the NEI Mark IV, small diameter 20 <br />gram cartridges. <br />The second Aztec seeder aircraft was equipped with a <br />Lambert type, 104-position rack which was used to dispense the <br />37mm Navy WMU-l type droppable cartridge. It is of interest to <br />point out that there were no firing failures in the entire lot of <br />WMU-l cartridges purchased from the Navy Weapons Center. <br />The cloud-base seeder aircraft was equipped with 2 wing- <br />mounted racks (12 positions each) for "in-position" burning pyro- <br />technic flares, and two wing-mounted Carley type solution-burning <br />generators. A 3% solution of silver iodide and ammonium iodate <br />in acetone was used in these generators. <br /> <br />D. Seeding and Radar Recognition' <br /> <br />1. Dynamic Seeding <br />The main change in seeding technique during the <br />past two seasons evolved around the "dynamic" seeding concept as <br />developed in the Flagstaff, Arizona and the NOAA Florida area <br />cumulus experiments. In tit s concept, silver iodide is applied in <br />the updraft of convective clouds. The rapid glaciation of the super- <br />cooled regions of the cloud updraft releases the latent heat contained <br />in the supercooled water, subsequently increasing the buoyancy of <br /> <br />8 <br />