Today's Message Index:
----------------------
1. 06:15 AM - Re: Re: Revmaster engine with EarthX battery (Robert L. Nuckolls, III)
2. 06:36 AM - Re: Rotax install (user9253)
3. 07:16 AM - Re: Rotax install (meat_ball)
4. 07:17 AM - Re: Re: Revmaster engine with EarthX battery (Charlie England)
5. 08:59 AM - Re: Rotax install (user9253)
6. 10:02 AM - two fuses in a circuit (Ken Ryan)
7. 10:11 AM - Re: two fuses in a circuit (Alec Myers)
8. 10:28 AM - Re: two fuses in a circuit (user9253)
9. 10:29 AM - Re: two fuses in a circuit (Ken Ryan)
10. 10:42 AM - Re: two fuses in a circuit (David Carter)
11. 10:49 AM - Re: two fuses in a circuit (Charlie England)
12. 12:17 PM - Re: Re: two fuses in a circuit (Ken Ryan)
13. 12:40 PM - Re: Revmaster engine with EarthX battery (Paul Eckenroth)
14. 03:58 PM - Re: Revmaster engine with EarthX battery (dj_theis)
15. 05:50 PM - Re: two fuses in a circuit (Finn Lassen)
16. 06:52 PM - Re: two fuses in a circuit (Charlie England)
17. 07:30 PM - Re: two fuses in a circuit (Ken Ryan)
18. 07:31 PM - Re: two fuses in a circuit (Ken Ryan)
19. 08:22 PM - Re: two fuses in a circuit (Charlie England)
Message 1
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| Subject: | Re: Revmaster engine with EarthX battery |
At 09:30 PM 8/6/2020, you wrote:
>
>All you have to do is put a diode between the alternator and
>battery. That will
>drop the voltage that the battery sees and limit the current.
That's worth exploring . . . you could take one
of the bridge rectifiers commonly used as an
e-bus, normal feed path isolator and wire it
so that you have one or perhaps two diodes in
series with the regulator's output. You're
shooting for a bus voltage just barely higher
than what's required to fully charge the battery . . .
i.e. 13.5 volts. Even that may not 'fix' the
problem. The alternator can still be overloaded
by other system loads. This just goes to mitigation
of battery demands as one of those loads.
>An EarthX battery has very low internal resistance. When the battery is low,
>it will take the full output of an alternator. That is why the size
>of the battery
>has to be matched to the alternator size.
Not really a 'matching' problem so much as a
poor design in the alternator/regulator
combination. Too many folks have been burning
the alternators on these engines for some
time . . . it has little if any to do with
choice of battery.
Is this an older production engine? Has Revmaster
offered any positive response to fixing this?
Bob . . .
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| Subject: | Re: Rotax install |
There is more than one way to wire the alternators. You can use the
3 position OFF-Battery-Both switch or separate switches.
Since you might eventually add a second alternator, to make it less confusing
for you or future pilots, I would use 3 separate switches:
Master battery contactor switch, alternator-1 switch, and alternator-2 switch.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=497550#497550
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| Subject: | Re: Rotax install |
user9253 wrote:
> There is more than one way to wire the alternators. You can use the
> 3 position OFF-Battery-Both switch or separate switches.
> Since you might eventually add a second alternator, to make it less confusing
> for you or future pilots, I would use 3 separate switches:
> Master battery contactor switch, alternator-1 switch, and alternator-2 switch.
Of course!! Next question is about the fuses. I want to use the fuse blocks instead
of breakers, but is there a hard and fast rule about which components should
have a panel circuit breaker instead of the fuse?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=497551#497551
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| Subject: | Re: Revmaster engine with EarthX battery |
On Fri, Aug 7, 2020 at 8:20 AM Robert L. Nuckolls, III <
nuckolls.bob@aeroelectric.com> wrote:
> At 09:30 PM 8/6/2020, you wrote:
>
>
> All you have to do is put a diode between the alternator and battery.
> That will
> drop the voltage that the battery sees and limit the current.
>
>
> That's worth exploring . . . you could take one
> of the bridge rectifiers commonly used as an
> e-bus, normal feed path isolator and wire it
> so that you have one or perhaps two diodes in
> series with the regulator's output. You're
> shooting for a bus voltage just barely higher
> than what's required to fully charge the battery . . .
> i.e. 13.5 volts. Even that may not 'fix' the
> problem. The alternator can still be overloaded
> by other system loads. This just goes to mitigation
> of battery demands as one of those loads.
>
> An EarthX battery has very low internal resistance. When the battery is
> low,
> it will take the full output of an alternator. That is why the size of
> the battery
> has to be matched to the alternator size.
>
>
> Not really a 'matching' problem so much as a
> poor design in the alternator/regulator
> combination. Too many folks have been burning
> the alternators on these engines for some
> time . . . it has little if any to do with
> choice of battery.
>
> Is this an older production engine? Has Revmaster
> offered any positive response to fixing this?
>
> Bob . . .
>
If it's the coils in the alternator that are dying due to overcurrent (and
Revmaster won't help you), a 'bandaid' might be a current regulator in
series with the alt output (actually, the rectifier/voltage regulator
output). Set it for the alt's max survivable current. The regulator would
lower voltage to limit current, and as the battery slowly charges and
demand drops, voltage will rise to normal preset level.
But you need to be aware that under excessive loads, voltage will sag to
keep current at the regulator preset current. Additional failure mode, so a
way to switch around it might be needed if alt output is critical to
flight, which adds complexity....
Are the coils failing due to overcurrent, or heat? Yeah, they are related,
but if you can cool the coils with blast tubes...
Charlie
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| Subject: | Re: Rotax install |
Some builders use all circuit breakers. It is a matter of personal choice.
I prefer fuses. They are lighter weight, cost a lot less, and never fail to open
the
circuit when required. Some breakers have been known to smoke instead of opening.
Circuit breakers should be used for circuits that might be expected to
momentarily draw too much current. Perhaps a landing gear pump.
Bob's drawings use a circuit breaker in series with the over-voltage crowbar module.
Your Rotax 20 amp alternator will be heavily loaded, thus unlikely to put out
too high
voltage. If you have a lead acid battery, it will absorb extra current for a
short time. You might risk not having over-voltage protection. Van's Aircraft
designed the RV-12 without over-voltage protection. Over 500 of them are flying.
If you have a lithium battery, over-voltage protection is highly recommeded.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=497556#497556
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| Subject: | two fuses in a circuit |
There has been some discussion about possible issues related to having two
fuses in the same circuit. I'm not sure if this was ever resolved.
My situation has to do with the indicator lights that tell me whether or
not each of my two fuel pumps is getting power. Of course the wire that
powers each pump is fused. But the wire that powers each indicator light is
tied to the same circuit as its respective pump, and that wire is protected
separately by a 2 amp fuse.
I have attached a picture of my wiring diagram. Wiring is 100% complete,
but airplane has not flown yet. Limited testing has not uncovered any
issues.
If the existence of these two amp fuses in my system could cause me to lose
power to a fuel pump, I would remove them, unless removing them causes
other problems.
See attached and as always, thanks!
Ken
Message 7
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| Subject: | Re: two fuses in a circuit |
Noob question... why is a separate fuse for the indicator light a good idea, if
the circuit is already protected?
On Aug 7, 2020, at 13:03, Ken Ryan <keninalaska@gmail.com> wrote:
There has been some discussion about possible issues related to having two fuses
in the same circuit. I'm not sure if this was ever resolved.
My situation has to do with the indicator lights that tell me whether or not each
of my two fuel pumps is getting power. Of course the wire that powers each
pump is fused. But the wire that powers each indicator light is tied to the same
circuit as its respective pump, and that wire is protected separately by a
2 amp fuse.
I have attached a picture of my wiring diagram. Wiring is 100% complete, but airplane
has not flown yet. Limited testing has not uncovered any issues.
If the existence of these two amp fuses in my system could cause me to lose power
to a fuel pump, I would remove them, unless removing them causes other problems.
See attached and as always, thanks!
Ken
<wiring-diagram.jpg>
Message 8
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| Subject: | Re: two fuses in a circuit |
Those 2 amp fuses are not a problem. If you want to experiment, you could short
out
an indicator light to make sure that the fuel pump fuse does not blow along with
the 2 amp fuse.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=497559#497559
Message 9
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| Subject: | Re: two fuses in a circuit |
If the indicator light shorts out I would not want that to take down the
pump itself.
On Fri, Aug 7, 2020, 09:18 Alec Myers <alec@alecmyers.com> wrote:
>
> Noob question... why is a separate fuse for the indicator light a good
> idea, if the circuit is already protected?
>
> On Aug 7, 2020, at 13:03, Ken Ryan <keninalaska@gmail.com> wrote:
>
> =EF=BB
> There has been some discussion about possible issues related to having tw
o
> fuses in the same circuit. I'm not sure if this was ever resolved.
>
> My situation has to do with the indicator lights that tell me whether or
> not each of my two fuel pumps is getting power. Of course the wire that
> powers each pump is fused. But the wire that powers each indicator light
is
> tied to the same circuit as its respective pump, and that wire is protect
ed
> separately by a 2 amp fuse.
>
> I have attached a picture of my wiring diagram. Wiring is 100% complete,
> but airplane has not flown yet. Limited testing has not uncovered any
> issues.
>
> If the existence of these two amp fuses in my system could cause me to
> lose power to a fuel pump, I would remove them, unless removing them caus
es
> other problems.
>
> See attached and as always, thanks!
>
> Ken
> <wiring-diagram.jpg>
>
===========
===========
===========
===========
===========
>
>
Message 10
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| Subject: | Re: two fuses in a circuit |
It's not the circuit that is protected by the breaker or fuse, it's the
*wire*. If the wire running to the indicator lamp is smaller than the 16
gauge running to the pump, the fuse is appropriate. I don't see the wire
size labeled. That fuse should be as near as possible to the junction of
the pump wire & the smaller indicator wire. If it's wired according to the
diagram, I don't see any way the fuse to the indicator could take out the
pump, because that fuse is not in the path of the electrons going through
the pump.
---
David Carter
david@carter.net
On Fri, Aug 7, 2020 at 1:13 PM Alec Myers <alec@alecmyers.com> wrote:
>
> Noob question... why is a separate fuse for the indicator light a good
> idea, if the circuit is already protected?
>
> On Aug 7, 2020, at 13:03, Ken Ryan <keninalaska@gmail.com> wrote:
>
> =EF=BB
> There has been some discussion about possible issues related to having tw
o
> fuses in the same circuit. I'm not sure if this was ever resolved.
>
> My situation has to do with the indicator lights that tell me whether or
> not each of my two fuel pumps is getting power. Of course the wire that
> powers each pump is fused. But the wire that powers each indicator light
is
> tied to the same circuit as its respective pump, and that wire is protect
ed
> separately by a 2 amp fuse.
>
> I have attached a picture of my wiring diagram. Wiring is 100% complete,
> but airplane has not flown yet. Limited testing has not uncovered any
> issues.
>
> If the existence of these two amp fuses in my system could cause me to
> lose power to a fuel pump, I would remove them, unless removing them caus
es
> other problems.
>
> See attached and as always, thanks!
>
> Ken
> <wiring-diagram.jpg>
>
===========
===========
===========
===========
===========
>
>
Message 11
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| Subject: | Re: two fuses in a circuit |
On 8/7/2020 11:58 AM, Ken Ryan wrote:
> There has been some discussion about possible issues related to having
> two fuses in the same circuit. I'm not sure if this was ever resolved.
>
> My situation has to do with the indicator lights that tell me whether
> or not each of my two fuel pumps is getting power. Of course the wire
> that powers each pump is fused. But the wire that powers each
> indicator light is tied to the same circuit as its respective pump,
> and that wire is protected separately by a 2 amp fuse.
>
> I have attached a picture of my wiring diagram. Wiring is 100%
> complete, but airplane has not flown yet. Limited testing has not
> uncovered any issues.
>
> If the existence of these two amp fuses in my system could cause me to
> lose power to a fuel pump, I would remove them, unless removing them
> causes other problems.
>
> See attached and as always, thanks!
>
> Ken
If you move the lamp connection point (and fuse) back to the source, any
issue disappears. Unless you're using the CB to control the pump, of course.
What pumps are you using? Facets run on about 2-3A; Walbro injection
pumps expect a 15A protection device (startup surge). The Wabros are
marked right on the pump.
Charlie
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Message 12
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| Subject: | Re: two fuses in a circuit |
Thanks everyone.
On Fri, Aug 7, 2020, 09:36 user9253 <fransew@gmail.com> wrote:
>
> Those 2 amp fuses are not a problem. If you want to experiment, you could
> short out
> an indicator light to make sure that the fuel pump fuse does not blow
> along with the 2 amp fuse.
>
> --------
> Joe Gores
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=497559#497559
>
>
Message 13
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| Subject: | Re: Revmaster engine with EarthX battery |
Thank you for all of the comments and suggestions. The Revmaster engine
is their latest iteration. The generators are rated at 18 amps each but
have the ability to open a 30 amp fuse located before the regulator.
Revmaster has suggested possibly reducing the number of wire layers in each
coil to 2 from the current 3 which I assume would lower the peak current
and therefore heat but I don't know what that will do to the final output.
After testing the generators today for continuity, I believe that I may
have avoided the need for a new stator. So my plan going forward is to buy
and install the B&C adjustable regulator. Install a current probe. And
try to fly the plane without burning up the generators. EarthX suggested
setting the voltage as low as 13.3 which would also reduce available amps.
I would certainly appreciate any additional suggestions.
Paul
On Thu, Aug 6, 2020 at 10:54 PM Robert L. Nuckolls, III <
nuckolls.bob@aeroelectric.com> wrote:
> At 07:52 PM 8/6/2020, you wrote:
>
> jeckenroth@nbn.net>
>
> I have a Revmaster engine in my Onex which is not dealing well with my
> EarthX battery. The engine has a total of 12 coils arranged on the stator
> which consists of 2 each of 5 coils making up the dual generator and 2
> coils powering the ignition. It all sounded good on paper with much
> redundancy but apparently the generator coils produce too much heat at full
> output which can cause them to short out. When used with the old fashioned
> lead acid battery the charge rate is less and therefore less heat. Is
> there any proper method to throttle the generator output or reduce the
> EarthX input to approach the charging rate of the lead acid battery and not
> cause the generator to create the excessive heat. I know the easy way is
> to just replace the battery but that would not be good for my W&B. Thanks
> for any help and suggestions.
>
>
> I've been hearing/reading about shortfalls in
> the design of that alternator for years.
> The thing is thermally marginal at best.
> If you can acquire an adjustable regulator
> for PM alternators, you can set the charging
> voltage down such that the alternator is
> not working quite so hard at the LOWEST
> voltage that will still charge the battery.
>
> The attached plot show EarthX test data from
> some years back. A bus voltage of 13.0 falls
> far short of fully charging the battery . . . while
> voltages of 13.5, 14.0 and 15.0 will all
> fully charge the battery. The BMS takes
> care of moderating any 'excess' voltage but
> its design rules will allow the battery
> to accept any safe level of replenishment . . .
> safe for the battery. Unfortunately,
> that current value is more than your
> alternator/regulator combination is able
> to grunt without smoking the windings.
>
> B&C has a new product that MIGHT be a
> solution . . . albeit an unfortunate
> 'band aid' on the Revmaster's shortcomings.
>
> https://tinyurl.com/y6mr4x7e
>
> You would want to set the bus voltage
> to 13.6 +/- 0.1 volts. I'm thinking this
> MIGHT do the trick.
>
> Give B&C a call and talk with their
> technowienies about this.
>
>
> Bob . . .
>
Message 14
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| Subject: | Re: Revmaster engine with EarthX battery |
>B&C has a new product that MIGHT be a
>solution . . . albeit an unfortunate
>'band aid' on the Revmaster's shortcomings.
I own the Revmaster R2300 with the same alternator. (I've asked for advice from
the forum on my project the past.) I also considered using the B&C regulator
to provide an adjustable voltage regulator in a more robust package than what
Revmaster provides. One thing that makes me pause is this thought process:
1) the original R/R is a half wave recitifer design.
2) The noted problem is an underdesigned PM alternator unable to reject heat produced
with both sides running. So, what's recommended is to run only one side
at a time.
Isn't running one PM alternator with full wave rectification about the same current
/ heat level as two regulators, each with a half wave rectifier?
Attached is my simpified sketch of the revmaster's PM alternators (for reference)
with a design I cleaved from Bob's Z16 drawings, including overvoltage protection
and switching (overvoltage not shown). I think my drawing is finding it's
way around the "net," which is fine. I'm pretty sure it depicts the R2300
alternator accurately.
BTW, I do like the current limiting idea, despite it's possible drawback with added
complexity.
Dan Theis
--------
Scratch building Sonex #1362
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=497570#497570
Attachments:
http://forums.matronics.com//files/revmaster_voltage_regulators_516.pdf
Message 15
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| Subject: | Re: two fuses in a circuit |
My GSL393 is marked "20 amp fuse".
Finn
On 8/7/2020 1:45 PM, Charlie England wrote:
> <ceengland7@gmail.com>
>
> On 8/7/2020 11:58 AM, Ken Ryan wrote:
>> There has been some discussion about possible issues related to
>> having two fuses in the same circuit. I'm not sure if this was ever
>> resolved.
>>
>> My situation has to do with the indicator lights that tell me whether
>> or not each of my two fuel pumps is getting power. Of course the wire
>> that powers each pump is fused. But the wire that powers each
>> indicator light is tied to the same circuit as its respective pump,
>> and that wire is protected separately by a 2 amp fuse.
>>
>> I have attached a picture of my wiring diagram. Wiring is 100%
>> complete, but airplane has not flown yet. Limited testing has not
>> uncovered any issues.
>>
>> If the existence of these two amp fuses in my system could cause me
>> to lose power to a fuel pump, I would remove them, unless removing
>> them causes other problems.
>>
>> See attached and as always, thanks!
>>
>> Ken
> If you move the lamp connection point (and fuse) back to the source,
> any issue disappears. Unless you're using the CB to control the pump,
> of course.
>
> What pumps are you using? Facets run on about 2-3A; Walbro injection
> pumps expect a 15A protection device (startup surge). The Wabros are
> marked right on the pump.
>
> Charlie
>
---
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Message 16
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| Subject: | Re: two fuses in a circuit |
Thanks Finn; I'm having a bad memory day (as you probably saw over on
the rotary list).
On 8/7/2020 7:45 PM, Finn Lassen wrote:
>
> My GSL393 is marked "20 amp fuse".
>
> Finn
>
>
> On 8/7/2020 1:45 PM, Charlie England wrote:
>> <ceengland7@gmail.com>
>>
>> On 8/7/2020 11:58 AM, Ken Ryan wrote:
>>> There has been some discussion about possible issues related to
>>> having two fuses in the same circuit. I'm not sure if this was ever
>>> resolved.
>>>
>>> My situation has to do with the indicator lights that tell me
>>> whether or not each of my two fuel pumps is getting power. Of course
>>> the wire that powers each pump is fused. But the wire that powers
>>> each indicator light is tied to the same circuit as its respective
>>> pump, and that wire is protected separately by a 2 amp fuse.
>>>
>>> I have attached a picture of my wiring diagram. Wiring is 100%
>>> complete, but airplane has not flown yet. Limited testing has not
>>> uncovered any issues.
>>>
>>> If the existence of these two amp fuses in my system could cause me
>>> to lose power to a fuel pump, I would remove them, unless removing
>>> them causes other problems.
>>>
>>> See attached and as always, thanks!
>>>
>>> Ken
>> If you move the lamp connection point (and fuse) back to the source,
>> any issue disappears. Unless you're using the CB to control the pump,
>> of course.
>>
>> What pumps are you using? Facets run on about 2-3A; Walbro injection
>> pumps expect a 15A protection device (startup surge). The Wabros are
>> marked right on the pump.
>>
>> Charlie
>>
>
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| Subject: | Re: two fuses in a circuit |
Charlie, the pumps are Walbro. I believe they are GSL395. I was advised to
use 10 amp fuse but I will double check. I did go to the Walbro website but
couldn't find specs.
On Fri, Aug 7, 2020 at 9:56 AM Charlie England <ceengland7@gmail.com> wrote:
> ceengland7@gmail.com>
>
> On 8/7/2020 11:58 AM, Ken Ryan wrote:
> > There has been some discussion about possible issues related to having
> > two fuses in the same circuit. I'm not sure if this was ever resolved.
> >
> > My situation has to do with the indicator lights that tell me whether
> > or not each of my two fuel pumps is getting power. Of course the wire
> > that powers each pump is fused. But the wire that powers each
> > indicator light is tied to the same circuit as its respective pump,
> > and that wire is protected separately by a 2 amp fuse.
> >
> > I have attached a picture of my wiring diagram. Wiring is 100%
> > complete, but airplane has not flown yet. Limited testing has not
> > uncovered any issues.
> >
> > If the existence of these two amp fuses in my system could cause me to
> > lose power to a fuel pump, I would remove them, unless removing them
> > causes other problems.
> >
> > See attached and as always, thanks!
> >
> > Ken
> If you move the lamp connection point (and fuse) back to the source, any
> issue disappears. Unless you're using the CB to control the pump, of
> course.
>
> What pumps are you using? Facets run on about 2-3A; Walbro injection
> pumps expect a 15A protection device (startup surge). The Wabros are
> marked right on the pump.
>
> Charlie
>
> --
> This email has been checked for viruses by Avast antivirus software.
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>
>
Message 18
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| Subject: | Re: two fuses in a circuit |
I will check the pump and see if it is marked.
On Fri, Aug 7, 2020 at 6:26 PM Ken Ryan <keninalaska@gmail.com> wrote:
> Charlie, the pumps are Walbro. I believe they are GSL395. I was advised to
> use 10 amp fuse but I will double check. I did go to the Walbro website but
> couldn't find specs.
>
> On Fri, Aug 7, 2020 at 9:56 AM Charlie England <ceengland7@gmail.com>
> wrote:
>
>> ceengland7@gmail.com>
>>
>> On 8/7/2020 11:58 AM, Ken Ryan wrote:
>> > There has been some discussion about possible issues related to having
>> > two fuses in the same circuit. I'm not sure if this was ever resolved.
>> >
>> > My situation has to do with the indicator lights that tell me whether
>> > or not each of my two fuel pumps is getting power. Of course the wire
>> > that powers each pump is fused. But the wire that powers each
>> > indicator light is tied to the same circuit as its respective pump,
>> > and that wire is protected separately by a 2 amp fuse.
>> >
>> > I have attached a picture of my wiring diagram. Wiring is 100%
>> > complete, but airplane has not flown yet. Limited testing has not
>> > uncovered any issues.
>> >
>> > If the existence of these two amp fuses in my system could cause me to
>> > lose power to a fuel pump, I would remove them, unless removing them
>> > causes other problems.
>> >
>> > See attached and as always, thanks!
>> >
>> > Ken
>> If you move the lamp connection point (and fuse) back to the source, any
>> issue disappears. Unless you're using the CB to control the pump, of
>> course.
>>
>> What pumps are you using? Facets run on about 2-3A; Walbro injection
>> pumps expect a 15A protection device (startup surge). The Wabros are
>> marked right on the pump.
>>
>> Charlie
>>
>> --
>> This email has been checked for viruses by Avast antivirus software.
>> https://www.avast.com/antivirus
>>
>>
>>
>>
>>
Message 19
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| Subject: | Re: two fuses in a circuit |
Found a link showing the 395 along with the other Walbro gerotor pumps=2E I
t shows 130 lph @ 15 psi, so the 10A fusing sounds more plausible=2E
https:
//walbrofuelpumps=2Ecom/walbro-gsl-series-universal-inline-fuel-pumps
I wa
s expecting either 3-6 psi for a carb, or 40-60 psi for electronic injectio
n=2E
Charlie
=81=A3Sent from BlueMail =8B
On Aug 7, 2020, 9:36
PM, at 9:36 PM, Ken Ryan <keninalaska@gmail=2Ecom> wrote:
>Charlie, the pum
ps are Walbro=2E I believe they are GSL395=2E I was advised
>to
>use 10 amp
fuse but I will double check=2E I did go to the Walbro website
>but
>could
n't find specs=2E
>
>On Fri, Aug 7, 2020 at 9:56 AM Charlie England <ceengl
and7@gmail=2Ecom>
>wrote:
>
rlie England <
>> ceengland7@gmail=2Ecom>
>>
>> On 8/7/2020 11:58 AM, Ken R
yan wrote:
>> > There has been some discussion about possible issues relate
d to
>having
>> > two fuses in the same circuit=2E I'm not sure if this was
ever
>resolved=2E
>> >
>> > My situation has to do with the indicator ligh
ts that tell me
>whether
>> > or not each of my two fuel pumps is getting p
ower=2E Of course the
>wire
>> > that powers each pump is fused=2E But the
wire that powers each
>> > indicator light is tied to the same circuit as i
ts respective pump,
>> > and that wire is protected separately by a 2 amp f
use=2E
>> >
>> > I have attached a picture of my wiring diagram=2E Wiring i
s 100%
>> > complete, but airplane has not flown yet=2E Limited testing has
not
>> > uncovered any issues=2E
>> >
>> > If the existence of these two a
mp fuses in my system could cause me
>to
>> > lose power to a fuel pump, I
would remove them, unless removing
>them
>> > causes other problems=2E
>> >
>> > See attached and as always, thanks!
>> >
>> > Ken
>> If you move the
lamp connection point (and fuse) back to the source,
>any
>> issue disappea
rs=2E Unless you're using the CB to control the pump, of
>> course=2E
>>
>>
What pumps are you using? Facets run on about 2-3A; Walbro injection
>> pu
mps expect a 15A protection device (startup surge)=2E The Wabros are
>> mar
ked right on the pump=2E
>>
>> Charlie
>>
>> --
>> This email has been chec
ked for viruses by Avast antivirus software=2E
>> https://www=2Eavast=2Ecom
/antivirus
>>
>>
>>
>>
>>
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