I'm flying with a 12V/12Ah battery with a full panel (calculator, radio,
Colibri, Ipaq, FLARM), and after 10h of operation the battery shows still
12.4V with the radio transmitting.

So what exactly do you need the 14V for?

--
Bert Willing

ASW20 "TW"


"David Kinsell" a écrit dans le message de news:
...
Paul Remde wrote:
Hi David,

You crack me up.

I highly recommend 12V systems in gliders. You can save yourself a lot of
money and hassle by using 12V batteries.

You want me to be like Mike/Strike and put in multiple 12 volt batteries
in hopes of getting enough juice to run a panel? After a while, he'll
figure out that switching batteries glitches his FR, computer, and radio,
so he starts throwing in the monster capacitors, the power Shottkies,
the microprocessor-controlled reed relays, and all the other garbage
people
use to try to get around the problems. Seems like when people try to be
cheap and lazy, it ends up costing them time and money in the long run.
It's one of those false economies type of things.

My little 14 volt tail battery (singular) powers the panel just fine even
after being cold-soaked at 18 grand for 5 hours. In fact, at the end of
the flight, it delivers more juice to the panel than people flying around
with 20 A-H of batteries have at take off. Been running a FR for about
six years, and haven't had a single glitch in the data in all that time.
If you have some actual information about why running undervoltage
batteries
is such a great idea, I'd like to hear it, but you really haven't offered
anything but personal opinion with no facts to back it up.


The design of radios has changed a lot in recent years. Good radios
don't require 14V batteries. Low cost and old radios do prefer 14V
power.


Really? You need to immediately contact the German manufacturers and
share
your revelations with them. Since you know more about the radios than
they
do, they'll be happy to correct all the wrong information in their
manuals.
If you should happen to actually read the manuals, you'll see they all
have nominal input voltages of 13.8 volts, just like always, but since
you're so much smarter than they are, you can rewrite the manuals for
them.
Obviously, they all have no idea what they're talking about, since they're
only the ones who designed the radios.

Dave