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clemwehner
Joined: 02 Feb 2009
Posts: 32
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 Posted: Tue Jun 01, 2010 7:09 am Post subject: 912 starter amperage |
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How much amperage does the 912UL starter draw during start?
I need to size the fuse providing power to the starter.
thanks for any help,
Clem
Oklahoma
KF-IV-912
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Clem
Oklahoma
Kitfox IV-912, under construction since 1991 |
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Lynn Matteson
Joined: 10 Jan 2006
Posts: 2778
Location: Grass Lake, Michigan
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| Posted: Tue Jun 01, 2010 10:06 am Post subject: 912 starter amperage |
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Can't answer your question, but I'll tell you what I've experienced
with a 5 amp breaker on my panel for the starter button, and
eventually out to the starter solenoid. If the sun beats down on your
*black* panel, like it does on mine, the breaker might kick out and
you'll have to cool it down before it will stay engaged....or bypass
the breaker until you get started. In hot sunny weather I always lay
a white rag over the breaker panel area to deflect heat away.
Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, #2062, 961.3 hrs (since 3-27-2006)
Countdown to 1000 hrs~38.3 to go(54 days to go)
Sensenich 62"x46" Wood (summer)
Electroair direct-fire ignition system
Rotec TBI-40 injection
Status: flying (and learning)
On Jun 1, 2010, at 11:09 AM, clemwehner wrote:
| Quote: |
<clemwehner(at)sbcglobal.net>
How much amperage does the 912UL starter draw during start?
I need to size the fuse providing power to the starter.
thanks for any help,
Clem
Oklahoma
KF-IV-912
--------
Clem
Oklahoma
Kitfox IV-912, under construction since 1991
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=299565#299565
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Lynn
Kitfox IV-Jabiru 2200
N369LM |
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Float Flyr
Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland
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| Posted: Thu Jun 03, 2010 3:13 pm Post subject: 912 starter amperage |
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Instantaneously a starter can draw more than 100 A and continuously over 80
A. (Small starter) This is why typically the lines that power a starter
motor don't have fuses or even a fusible link. It is also why it is
recommended to have the starter relay as close to the battery as possible.
Cessna actually puts the starter relay and the ground power relay right on
the battery box. That way all the heavy current carrying cable is dead
except when the starter motor is actually being used.
If you try switching the starter lead directly (no solenoid) you better have
a big switch!
Noel
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Noel Loveys
Kitfox III-A
Aerocet 1100 Floats |
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