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Tennis Ball Cooker

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The prototype, working as designed three years later, was stored outdoors (in partial shade, subject to temperatures from 30 degrees F to 90 degrees F and precipitation) for two years to test the weatherworthiness of the design. The mirror material did not degrade or delaminate from any of the CD cases, and the CD cases did not, in nearly all cases, separate from the tennis balls on which they were mounted. The "gator board" platforms failed, however. About half of the hot glue attachments between the tennis ball halves and the gator board failed due to lost adhesion, and another quarter failed due to delamination of the gator board itself. In addition, the gator board warped over time, rendering the orientations of many of the mirrors incorrect. Aluminum sheet or waterproofed and Fibergla

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The prototype, working as designed three years later, was stored outdoors (in partial shade, subject to temperatures from 30 degrees F to 90 degrees F and precipitation) for two years to test the weatherworthiness of the design. The mirror material did not degrade or delaminate from any of the CD cases, and the CD cases did not, in nearly all cases, separate from the tennis balls on which they were mounted. The "gator board" platforms failed, however. About half of the hot glue attachments between the tennis ball halves and the gator board failed due to lost adhesion, and another quarter failed due to delamination of the gator board itself. In addition, the gator board warped over time, rendering the orientations of many of the mirrors incorrect. Aluminum sheet or waterproofed and Fiberglas reinforced honeycomb cardboard seems the more durable material for the platforms, and perhaps fast-curing epoxy rather than hotglue for gluing the tennis ball halves to the platform. Storing these cookers indoors, of course, would be ideal, as would storing them in a hanging position, rather than having them stand under their own weight.