[aprssig] Tracker3 9600 baud balloon tracker beta offer
bruninga at usna.edu
Thu Dec 19 07:29:49 CST 2013
> it finally froze after sunset. A fast-rising balloon in daylight
> would probably be fine, but I'd still recommend more than
> the 1/2 inch foam that we used for insulation.
For daytime flights, insulation is not needed at all. I've never
understood this concentration on foam especially -white-foam when the
balloon payload is in -bright-sun the entire flight. Just put the payload
in a clear plastic coke or water bottle. Provides flotation as well as
Our first one back in 1990 something had 3 layers of concentric clear
plastic bottles and it overheated. Have flown a few small ones since, but
still need to do a well instrumtend flight to find out if one-layer is
sufficient. My present plan is a clear very light weight plastic water
bottle and the payload (painted black) wrapped with one layer of bubble
wrap inside the bottle.
This also satisfies the ballistic cushion requirement also.
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