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Battery life when running a transponder
Can anybody tell me what battery life you get in practice, when running a transponder from a dedicated lead-acid battery, and what size battery that is? And what model of transponder is it? Has anybody measured the actual current drawn during operation, if so what is it? I am particularly interested in flights which include some high altitude, cold ambient operation such as in parts of North America. I am only interested in modern, solid state transponder operation, not the older Mode C with a heater for the height encoder. I have been given figures which suggest that a 7-amp-hour battery would run one for 12 hours at surface ambient conditions, and I wonder if anything like that is achievable in practice. Thansk - Chris N. Chris N. (In UK, but collecting data from anywhere that has it!) |
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