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Hi Doug,
Can't help you as I have only one alternator and one
battery. I flew for approx 5 years with two batteries. I first had
two 25 AH RC-Concord batteries which weighed a total of 44 lbs. The only
thing I ever used the second battery for was to assist in cranking. I then
moved to two 17 AH Odyssey batteries weighting a total of 28 lbs and am now down
to 1 17AH odyssey weight 14 lbs. I use one of the battery pulsars to
help keep the sulfating down and now replace the battery every second
year.
I do have a "abnormal voltage" (too high - too low) warning
light on the panel right in front of me and do monitor the alternator voltage
every 15 minutes (or more frequent as I include it in my instrument scan).
With minimum electrical load I calculate I can fly a minimum of 30 minutes with
battery along - which in the eastern US will easily get me within range of an
airport to set it down on.
Tracy Crook has flown over 1600 hours most of that with one
battery also. Personal opinion, but I am not convinced that adding more
alternators, batteries and their connectors necessarily results in more safety -
but, I do know it certainly adds weight and complexity.
FW
Ed A
----- Original Message -----
Sent: Tuesday, January 24, 2006 7:10
AM
Subject: [FlyRotary] Two
Alternators?
I am debating the future use of two batteries vs. two alternators and I
was wondering if anyone in the group has mounted a second alternator and if so
if they had any pictures of its mounting location, etc.
Thanks for the information.
Doug Lomheim RV-9A / 13B
OK City, OK
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