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How Reliable Is Your Panel?
(from a related thread)
It worked fine but I could hear it on the radio. Puting the switch in a metal box and grounding the box should help but it seems silly to me since the Volkslogger and SN-10 both can log the flight and are both very reliable. Of course the SN-10 log can't be used for badges or records but it could probably be used as a backup if the Volkslogger failed (which is not likely if reliable 12V power is assured). Forgive me if I cringe at words such as "very reliable" and "not likely." With all due respect to the technical wizards, these assurances are maddening for anyone who's lost a flight due to flight recorder or other electronic equipment failure. I've had two unrelated GPS flight recorder failures in the past 12 months, neither caused by power problems. I know of several other logger failures at the Hobbs U.S. Standard Class Nationals this summer. Some folks had backups, some lost all points. Most serious contest pilots now carry a backup flight recorder which, at nearly $1,000 each, is an expensive form of insurance. My faithful LNAV is still crunching away 12 years after I bought it (albeit with a number of firmware upgrades) but takeoff grids and this newsgroup are buzzing with complaints about problems with expensive varios/flight computers. Most of us have backup varios but I've seen few redundant full-race systems. How frequently do these things fail? With the perspective of nearly 40 years of soaring, my answer is "increasingly often." What appears to be a significant problem with flight recorder reliability is mirrored by the agonized howls I heard this summer with many of today's state-of-the-art vario/flight computers. The common thread to all of this is the growing complexity of modern electronic flight management systems and the small size of the soaring market exacerbated by the profusion of small companies playing in it. I'm a died-in-the-wool capitalist and I welcome the advances in functionality that competition brings. But the unfortunate side effect is that no single instrument or device is ever produced in sufficient quantity to wring all the bugs out of it. The ironic result is that many of us own spares for the cheap but highly reliable stuff like PDAs (low cost and reliability being the result of large non-soaring markets and high production volumes) but only one of the really expensive but more temperamental soaring-specific systems such as flight computers. Flight recorders are somewhere in between. They work most--but not all--the time, and they are sufficiently affordable to allow carrying a spare. I'm being simplistic here, obviously. I'm lumping together software, hardware, and power issues, and ignoring differences across brands. But I'm still troubled by the growing sense that "progress" is pushing us into greater and greater dependence on electronic gadgets whose reliability is proving to be less than acceptable to serious cross-country and competition pilots. At the end of the day, most of us are seeking the least expensive combination of reliable, highly functional, easy-to-use equipment that provides the most flexibility, compatibility, and redundancy. That shouldn't be so difficult, right? I don't have the answer, if indeed others think this is a problem. But I'd welcome other perspectives. Chip Bearden |
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