|
|
I don't see the point of two primaries (unless you're using 1920s era technology like mags). My notion is to have a good, solid ND primary and either a [small] backup battery or [small] backup Alt. If I have redundant primaries, I'm probably too heavy, and (just me) more tempted to drive around with one failed while I wait on parts or something. If we stipulate that we're talking about inflight failures, even a minimal (15-20 amp) backup alt will extend my battery life waaay beyond fuel exhaustion. Remember, we've been talking about batteries that will fly us for an hour or more all by themselves. It doesn't take much of a backup alt to reduce that discharge rate enough to extend the battery life to more hours than we have fuel for.
Even with EFI, EWP electrical retractable gear, 20 amps would bring us home ... Jim S.
WRJJRS@aol.com wrote:
In a message dated 2/23/2005 9:42:42 PM Pacific Standard Time, canarder@frontiernet.net writes:
<... If you have a real AMP-sucker they can probably stack two ...>
It's not there for normal operations. It's to get you home. Even
10 or 15 amps would greatly extend battery life. That's the
object of the exercise.
Jim S.
Partially true Jim, If the output is enough for you it can be your primary. Of course if you used a belt driven alternator as a primary it would be fine as a backup.
Bill Jepson
|
|