"Lloyd Sumpter" wrote in message
news
On Sun, 24 Aug 2003 11:09:23 +0000, BinaryBil wrote:
On Sat, 23 Aug 2003 21:03:26 -0700, "Lloyd Sumpter"
wrote:
On Sat, 23 Aug 2003 20:33:59 +0000, kcb559 wrote:
(kcb559) wrote in message
. com...
"Calif Bill" wrote in message
link.net...
"kcb559" wrote in message
Tom
SO, BASICALLY A DEEP CYCLE BATTERY AND A TROLLING BATTERY ARE THE
SAME
THING AND WILL BOTH LAST ME LONGER (DUE TO THE NUMBER OF
RECHARGES
AVAILABLE)THAN A STARTING BATTERY; HOWEVER, WITH THAT SMALL
ENDURA 30,
A STARTING BATTERY WOULD WORK OKAY (ALTHOUGH IT WOULDN'T LAST AS
LONG)
IF I KEPT THE SPEED DOWN AND DIDN'T ASK IT TO WORK TOO HARD. IS
THAT
ABOUT IT?
-KCB
No, the starting battery will be very prone to failure after the 2
or 3rd
recharge. The plates warp and short out. If you get a Wal-mart or
some
other 6 month full replacement battery, you may be ok on your
money, but
every couple of months you will have to take the battery in. The
difference
in price is negligible. A deep cycle group 27 at Costco is about
$53.
Group 24 a couple of bucks cheaper. Wally world is probably in the
same
price range.
Bill
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~
I was in Wal*Mart the other day and their starting batteries carry a
TWO-YEAR FREE REPLACEMENT warranty. Wonder how many batteries before
they'd get tired of giving me yet another new one? 5, 10, 15?
LOL...
-KCB
################################################## #######################
OKAY, I'VE FINALLY MADE A DECISION. I'M BUYING A DEEP CYCLE BATTERY.
NOW, NEXT ITEM...A 24 OR A 27 SERIES TO USE WITH THE MINN KOTA ENDURA
30? ALSO, AMP HOURS? IF I RUN THAT LITTLE ELECTRIC TROLLING MOTOR AT
MIDDLE SPEED WITH EACH, APPROXIMATELY WHAT WOULD I NEED IN AMP HOURS
TO TOOL AROUND THAT LAKE FOR 4 HOURS?
-KCB
This is something I'm going to research and post my findings on the web
(or sell them to Minn Kota!). The closest thing to "amp-hrs" that they
admit to is "max amps", but it doesn't make sense (the 12V, 40-lb motor
supposedly draws more than the 50-lb model!). I will measure current
draw
at various speeds for both my 30-lb Endura and 40-lb Maxum.
Until then...The Endura is supposed to draw 30A "max", so say 30A at
setting 5. I THINK, based on the little chart on the top, setting 4
would
be about 15-20A max, 3 would be about 12, 2 maybe 8, and 1 4 (something
like that). So at setting 3, you would use 48 amp-hours in 4 hrs.
More meaningless guesswork from Lloyd, who really hasn't much of a clue.
The
Maxum line of motors have an entirely different motor control system.
The
Maxum's use PWM and infinitely variable control, (they call it
"Maximizer")
while the less expensive and less efficient Endura series use a plain
old 5
position switch and resistance to control speed. This makes a HUGE
difference in
how long each motor will run at anything other than maximum WOT.
What's the EXACT current draw from A) the 30-lb Endura at position 3, and
B) the 40-lb Maximizer at 60% ?
Lloyd
Probably less with the Maximizer if they both are at the same thrust. The
Maximizer gives full voltage to the motor at all times via a pulsed DC and
reducing the duty cycle vs. the other motors give a reduced voltage via a
resistor to slow the motor down. The resistor burns up energy as heat,
therefore less time from the same battery. The pulsed DC has an effective
voltage less than the 12V's but the reduced voltage is not wasted as heat.
If you want all the numbers and formulas, I could probably go through my
college stuff and dig up my senior thesis where I disigned and built an
underwater dive light with an intensity control via a 555 timer and same
principals.
Bill