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Paralleling Solar Panels - Can you do this? - Page 3

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Posted by Bruce in alaska on June 11, 2010, 12:13 am

I am familiar with a vessel that has NO BATTERIES anywhere onboard. This
is a River Tug, designed to be left unattended, on the Yukon River, all
winter, and then reactivated in a few hours in the spring. The twin Main
Engines are Air Start, as is one of the twin Big Gensets. the other Big
Genset has both Air and Hydraulic Starters, and the Small Genset has
Hydraulic, and Inertial Starters. When the Crew returns in the Spring,
they start the small Genset FIRST. Usually with the Inertial Starter. It
is like a BIG Flywheel that you wind up with a Crank. Once the Flywheel
is spinning a a good clip, you give the Intake Manifold a small shot of
ether, and engage the Starter. Usually you only need to wind it up once
for a start. Once the small Genset is running, It is just big enough to
run the Twin Big Gensets Intake Manifold  Heaters and the Air
Compressor, that charges the Starting Air Tanks. When Air Pressure in
the Air Tank is up, one of the twin Big Gensets is started, which can
supply power for the whole vessel, Heat, Lights, and run all the
machinery. When I was there, the whole startup procedure took less than
20 minutes, and the Mains were online, inside an hour. The Hydraulic
Starters are very simple, in that you have a 2 Foot long handle, that
you pump, back and forth, until the Pressure Gauge reads in the Green,
and shows Good Pressure in a Tank. That feeds the Hydraulic Starters on
one Big Genset and the Small Genset. You just open the valve that feeds
the Starter, and that spins up the engine. Never have a problem with
Dead Batteries.

Bruce in alaska
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Posted by John B. slocomb on June 11, 2010, 11:29 am


Sure you can do that. I don't know whether they make them any more but
airplanes used to have hand cranked inertial starters. I even started
a R-3350 on a B-29 once to see whether they really worked and they do.
A gas plant I built used gas starters, like an air starter but powered
by the gas stream.

And I'm pretty sure that you can still buy spring starters. Used to
use them some in the oil field. No sparks. You cranked a shaft on the
back of the starter that wound up a big spring inside the starter.
After you got it wound then  (you had to hold your mouth just right)
you pulled the starting lever and whoosh (if you were lucky) it
started. Used in areas where there might be gas. No generators or
batteries to cause an explosion.

In fact I saw one of these on a sailing yacht engine - maybe 40 H.P.


John B.

Posted by Jim Wilkins on June 11, 2010, 12:16 pm

When I was a kid we had a lawnmower with a wind-up spring starter.
Fortunately it had a rope drum backup for whenever the spring or
ratchet broke.


Posted by John B. slocomb on June 12, 2010, 1:02 am

On Fri, 11 Jun 2010 05:16:00 -0700 (PDT), Jim Wilkins

Apparently the manufacturer is alive and well as I found this


John B.

Posted by Martin Riddle on June 12, 2010, 8:06 pm

PV panels are current sources. Not voltage sources.


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