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khorton01(at)rogers.com
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 Posted: Sat Jan 05, 2008 6:00 pm Post subject: [Bulk] 14 v Gyro on a 12 volt sustem? |
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On 5-Jan-08, at 20:32 , Don G wrote:
| Quote: | I am looking at Electric attitude gyros and I have a rotax 912 with
a 12 v system in my craft. My question is, will an insturment
listed as a 14 volt perfom ok on a 12 v system?
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People tend to use the terms "12v" and "14v" interchangeably to
describe electrical systems with batteries that are at about 12v when
at rest, and with alternators that put out about 14v when the engine
is running. This instrument should be fine on your aircraft, assuming
the total electrical load of all systems is low enough to be handled
by your alternator.
--
Kevin Horton RV-8 (final assemby)
Ottawa, Canada
http://www.kilohotel.com/rv8
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schaefer(at)rts-services.
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| Posted: Sat Jan 05, 2008 6:30 pm Post subject: [Bulk] 14 v Gyro on a 12 volt sustem? |
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Some "14V" equipment will only work when an engine supplied power source is
providing power. We have tried many older 14V avionics in gliders with only
a "12V" battery and they fail rather quickly as the battery voltage drops.
You really need to know what the acceptable voltage range of the equipment
is and decide if you can live with it when that alternator/generator quits!
r.t.s.
--
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