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#1
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Bought one last year and use similar to kbecker in back seat. They really knock the edge off while down low, usually turn off at altitude and back on for landing on cross country. Freezing blocks of ice in large Tupperware dish in addition to ice cubes really stretches the length of time these are useful. I bought the recharge unit with drill battery and turn on while pulling out and preflight to cool things off even earlier. They work!
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#2
03-16-22, 05:36 PM
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The size of the ice cubes is directly related to the time available for cooling and inversely related to the degree of cooling.
Regular ice cubes provide lower temperature, but they melt faster and you can't use the cooler for as long. I have found that these ice blocks about the size of small loafs of bread provide a good balance of cool temps/cooling time. I also don't start off with much water in mine--I place the sump pump in one of the rear corners of the unit, fill with ice blocks, prop the unit up so that the water flows to that back corner, and I only add enough water to get thing going (somewhere around 1/2 gallon). I too turn mine off at altitude and back on with descent and landing. I looked into the STC'd AC some years ago, the one that puts the scoop on the belly of the plane. As I recall it was about $20K installed. I figured I could freeze a lot of water for $20K.
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#3
03-17-22, 06:49 PM
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Kbecker couldn’t agree more. I try for best of both world’s and use smaller cubes in combo with the blocks. It seems to get started, the small cubes and water chill things down and the large chunks are sustainers for the long haul. I’ve done 3.5hr legs, and still have some “chunk” left after landing. I don’t think the chill is quite as good in decent as ascent with the smaller cubes still present “pre-melt”, but still not bad.
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