Today's Message Index:
----------------------
1. 05:23 AM - Re: Starter Circuit: Verner 7U Radial (dj_theis)
2. 06:02 AM - Re: Starter Circuit: Verner 7U Radial (user9253)
3. 12:14 PM - Re: Re: Excessive Amperage (Charlie England)
Message 1
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| Subject: | Re: Starter Circuit: Verner 7U Radial |
Eric Page wrote:
>
> If the separate contactor is necessary, then please explain:
> 1. Why?
> 2. Should it supply all power to the starter -- both motor current and control
signal -- or, just the control signal?
>
I think you are implying it appears redundant, and I agree. The only good reason
I can imagine is if the starter does not have a separate terminal for solenoid
acitivation.
Ford motor company designed their starters with a single terminal and put the starter
on the fender for years while GM always ran a fat wire to the starter with
a secondary small wire from the ignition switch on a second smaller starter
terminal.
Relays are (as you know) used to keep the fat wires out of the cockpit and simultaneously
keep the wire length from the battery to the starter short. Assuming
an activation terminal on the starter, there is no advantage (that I can think
of) in adding another relay in series. The master contactor already provides
a second contactor in series to the starter as a safety disconnect and utility
to disconnect power in the case of a "stuck starter solenoid."
It will be interesting to hear Bob's response.
Dan
--------
Dan Theis
Scratch building Sonex #1362
Still working on the Revmaster Alternator improvement
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=511103#511103
Message 2
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| Subject: | Re: Starter Circuit: Verner 7U Radial |
Below is from http://www.matronics.com/archive/archive-get.cgi?AeroElectric-Archive.digest.vol-kt dated Dec 18, 2011.
> Is the likelihood of the starter contactor failing closed, great
> enough to warrant the use of two contactors in series with the starter
motor?
Not if you can climb out quickly and disconnect the battery
without undue hazard. But the incidences of sticking starter
contactors of the S704 variety are exceedingly rare.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=511104#511104
Message 3
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| Subject: | Re: Excessive Amperage |
=81=A3Get BlueMail for Android =8B
On Jul 8, 2023, 6:44 PM, at
6:44 PM, skywagon185guy <skywagon185@gmail=2Ecom> wrote:
>Paul,
>Check out
the various YouTube videos that deal with RV travel with the
>solar market
=2E
>Many have converted to lithium batteries for their solar storage and
>
great
>power capacity=2E
>They have the same problem, namely stock alternat
ors burning up trying
>to
>supply max amperage at idle speeds=2E
>Resulting
in too little air cooling=2E
>Companies like Victron, Renegy, etc=2E, etc
=2E, make "Charge controllers"
>to
>safeguard the alternators from overheat
ing=2E
>
>
>On Fri, Jul 7, 2023 at 2:49=AFPM Paul Eckenroth <N509RV@e
ckenroth=2Ecom>
>wrote:
>
>> David
>> You refer to gizmos made to take cont
rol of the charge rate such that
>it
>> stays under the alternators design
limits=2E Can you be more specific
>as to
>> what these gizmos are=2E I h
ave been looking for something like this
>to try
>> and keep the stator in
my Revmaster engine from burning up again=2E I
>> believe that controlling
the output is the key=2E
>> Thanks
>> Paul
>>
>> On Sun, Jul 2, 2023 at 2:
19=AFPM skywagon185guy <skywagon185@gmail=2Ecom>
>> wrote:
>>
>>> Bat
tery=2E=2E=2E=2ELithium
>>>
>>> Joe makes a very good point about the poten
tial of Lithium base
>batteries
>>> to potentially cause charging problems
=2E
>>> The other side of this combo is that when a "normal" alternator is
>>> running at idle speeds the Lithium is able to handle receiving a
>very
heavy
>>> current charge rate such that the alternator could easily overhea
t
>and burn
>>> some internal part due to lack of cooling for such a heavy
current
>draw=2E
>>> There are gizmos made to take control of the charge ra
te such that
>it stays
>>> under the alternators design limits=2E
>>> The m
arine and RV folks use these controllers to safeguard their
>>> expensive s
tuff=2E
>>> David
>>>
>>> On Sun, Jul 2, 2023 at 6:02=AFAM user9253 <
fransew@gmail=2Ecom> wrote:
>>>
>>>> --> AeroElectric-List message posted b
y: "user9253"
><fransew@gmail=2Ecom>
>>>>
>>>> Below is from https://earthx
batteries=2Ecom/faqs/
>>>> I just installed my EarthX battery in my aircraf
t and started the
>engine
>>>> and my charging amps was really high, is thi
s normal?
>>>> =2E
>>>> Yes, this is normal=2E A lithium battery can and wi
ll accept a much
>higher
>>>> charging current than an equal size lead acid
battery=2E
>>>> If your battery is not fully charged, your alternator can
>potentially
>>>> output a current equal to
>>>> or slightly above the al
ternator=99s rating for a few minutes to top
>the
>>>> battery off=2E
>>>> =2E =2E =2E
>>>> You must use a lithium battery that is designed to h
andle the
>current
>>>> from the alternator
>>>> or you can damage the batt
ery, cause premature failure or possible
>even
>>>> cell rupture=2E
>>>>
>>
>> --------
>>>> Joe Gores
>>>>
>>>>
>>>>
>>>>
>>>> Read this topic online
here:
>>>>
>>>> http://forums=2Ematronics=2Ecom/viewtopic=2Ephp?p=511019#
511019
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> ===========
>>>> -
>>>> Electric-List" rel="noreferrer" target="_blank">
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://www=2Ematronics=2Ecom/Navigator?AeroElectric-List
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>>>> eferrer" target="_blank">http://for
ums=2Ematronics=2Ecom
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>>>> -Matt Dralle, List Admin
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