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Smoke

 
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frank.phyllis(at)mindspri
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PostPosted: Tue Mar 18, 2008 4:49 pm    Post subject: Smoke Reply with quote

Last evening I experienced smoke in the cockpit of my Kitfox--912S.

First, I want to thank Bob N for convincing me of the importance of
using Z16, incorporating an E-Bus circuit. Worked great and reduced the
load on my "little" motorcycle battery so that I maintained > 11.5 v for
the 15 min duration of my flt.

It was twilight & I had Whelan strobe & nav lights on, near max elec
capacity for the 912 generator. I threw on the landing lt to see what
the added load would do to the system. (Probably not a smart move)
Immediately the system voltage, normally runs 13v, began dropping, so I
turned the landing lt off after a few seconds.

I then began doing a series of steep climbs at slow airspeed. After
about five min I noticed a burning odder, thinking to myself "someone
must be burning trash and I'm in the trail of smoke." After about 30
seconds I noticed smoke coming from under the instrument panel and a
much stronger burning odder. I dropped the nose of the airplane--no
more smoke.

At that moment my GRT EIS warning lt flashed and I noticed the system
voltage below 11 v. I turned on the E Bus switch and off on the main.
Voltage came up--12 v I think. No odder or smoke or falling voltage.

After a few minutes I decided to try the main switch again, pulling in
the battery relay and alternator. Voltage began to climb above 12 v to
about 12.5 v. I added strobe & nav lt again causing an immediate
reversal in voltage trend and warning lt came on again as it plunged
below 11 v. Again I went to E Bus an off main. I landed uneventfully.

My guess is the relay over heated with the momentary excessive
electrical draw (does that happen?) causing the smoke. Any Ideas? I
assume I need to replace the regulator??? What would you recommend as a
replacement regulator/source. Anything else??????

Thanks

Frank
N5929


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shoskins(at)MCHSI.COM
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PostPosted: Tue Mar 18, 2008 7:50 pm    Post subject: Smoke Reply with quote

Positive ground depends upon proper circuit functioning, the
transmission of negative ions by retention of the visible spectral
manifestation known as "smoke". Smoke is the thing that makes electrical
circuits work; we know this to be true because every time one lets the
smoke out of the electrical system, it stops working. This can be
verified repeatedly through empirical testing.

When, for example, the smoke escapes from an electrical component (i.e.,
say, a Lucas voltage regulator), it will be observed that the component
stops working. The function of the wire harness is to carry the smoke
from one device to another; when the wire harness "springs a leak", and
lets all the smoke out of the system, nothing works afterwards. Starter motors were frowned upon in British Automobiles for some time, largely because they consume large quantities of smoke, requiring very large
wires.

It has been noted that Lucas components are possibly more prone to
electrical leakage than Bosch or generic Japanese electrics. Experts
point out that this is because Lucas is British and all things British
leak. British engines leak oil, shock absorbers, hydraulic forks and
disk brakes leak fluid, British tires leak air and the British defense
establishment leaks secrets...so, naturally, British electronics leak
smoke.

The Theory Explained through Discussion.

When wires smoke, how come the smoke is not the same color as the wire?

This is not completely true. When the smoke is in the wire, it is under
pressure (called voltage). The pressure difference causes the color to
change from the normal color we are used to. Not unlike the blood in our
veins and arteries changing color due to the oxygen content. When the
smoke escapes the wire and is exposed to air, the pressure is released,
and the color reverts back to what we commonly recognize as smoke. The
wire then changes to the color of the smoke that escaped.

I hope this helps you understand.


I would only question the last sentence of that description. It has been
my experience that the wire turns a color directly opposite of the
smoke.

Not always true, I think it must depend on the composition of the smoke
in question.


I should have made it a little clearer; the color the wire becomes, is
directly proportional to the escape velocity of the smoke. Higher
velocities generate higher heat. This heat tends to burn the wire and
affect the coloring. The statement was meant to be a generalization,
indicating the fact that the color of the wire does in fact change.
Sorry for the miscommu nication.

I was speaking of electrical smoke which is generally white. The spent
smoke casing generally assumes a color somewhat near black after the
smoke leaves.

I can't stand it anymore! If, as you say, light bulbs suck up darkness
and convert it to smoke which is transmitted (via wire) to a power
source for recycling...why do car batteries go dead when lights are left
on? Do car batteries (and flashlight batteries for that matter) have a
limited amount of storage capability? Is it like a hard drive that gets
so full that you have to double-space and then lose all data?

Now you're getting it.......

I thought you guys were smarter than this. Of course the battery stores
the smoke. In fact it can store so much smoke that if you open the top
and light a match, the resulting explosion can do serious damage. I'm
sure you are aware that usually where there's smoke there's fire. If you
connect the battery to a charger, the smoke is then returned to the wire
(Remember, a light bulb wont work unless it is connected to a wire
system) for the utility companies to use. Your hard drive analogy is a
very good example.

Our hardware guys might be onto something in their quest for superior
wiring. I have noticed the unique method of series/parallel wiring the
power strips on our systems seems to prevent the smoke from getting out
of the wires. A "Smoke Loop" of sorts. In the case of the "smoked"
workstation recently, you should notice that this was a conventional
single power strip installation.

Since color is perceived by the cone shaped receptors in our eyes, and
cones require more light that their rod shaped counterparts. Is the sky
blue at night?

At night the process including contraction of the pupil is visual purple
by which the eye adapts to conditions of increased illumination when
facing 300 candle power redeflecting devices.

Since there is a spectrum of light that we as humans cannot see, I
support the theory that everything is going up in smoke, we just can't
see it. This may explain why the neighbors dog barks for no apparent
reason.

I think your basic understanding of smoke systems is remarkable. However
I find a flaw with your theory. The battery is a reusable storage device
for smoke. therefore, one would assume that some sort of one way valve
(we can call it a diode) should be needed to prevent pressure flooding
back into the system while at rest. Unlike the A/C system, the smoke
system is collecting darkness at the headlights and converting it to
smoke. This causes the system to fill up. The battery can contain much
higher pressures and volumes than the wires. If this pressure exceeds
the capacity of the wire, it will cause a rupture as you described. The
rupture can be controlled by a sacrificial device known as a fuse. Bu t
this still doesn't eliminate the problem. Perhaps a two way valve (zener
diode) is used to allow a small amount of pressure to return to the
system, and partially equalize. I find this theory unlikely though, due
to the increase in the force required to start the pump (which is now
under pressure) working again...

The smoke continues circulating through the system, due to the pressure
differential in the battery (smoke pressure/vacuum reservoir). When the
reservoir becomes depleted, the pressure simply equalizes everywhere in
the system (similar to an A/C system when it's turned off) and stuff
just wont work. Notice the relations: Work (W) = Force (F) x Distance
(D); Force (F) = total difference in pressure (Dp) x Area (A).
Therefore, the work done in a pressure system is: Dp x A x D. If the
pressure differential (Dp) is reduced to zero then W = 0 x A x D = 0.

The smoke only escapes the wires when a path is created b etween the
pressure differential areas ((at) either the reservoir or the pump) that
has too little restriction. When this happens, the smoke travels through
the wires so fast that the friction between the smoke and the outer
walls of the wiring heats the wires until they rupture. The smoke
continues to escape until its pressure is equalized with the atmosphere,
or until the conduit that provides the path between pressure areas is
severed. When this happens, the sudden drop in pressure allows the wires
to "collapse" slightly and, being soo hot, as the edges of the ruptures
and severed ends touch, the material becomes fused, sealing the system
and retaining the remaining smoke.

Don't forget, when the system is at rest, all the valves, (switches and
relays) are closed, keeping the pressure areas separated. When
restarting the pump, as long as everything is OK, the smoke pressure is
equal on both sides of the pump and there is no net force on the pump
when it begins operating again. Also, within the pump there are
pressure/volume actuated one-way valves with restrictors built in,
arranged in such a way that they keep excess smoke volume recirculating
through an integral smoke loop, which maintains the pressure within
manageable limits.

The excess smoke, created by the light/smoke converters (headlights and
other darkness absorbing devices), is changed back to darkness and
dissipated in small unit concentrations so its dark effect is not
locally observed. The smoke pump impeller (stator), converts smoke into
magnetic flux which does work on the engine. Some of the excess work
energy is dissipated through the cooling system and exhaust in the form
of heat, while the remaining work energy is converted back to smoke and
distributed evenly in small concentrations as you drive. This maintains
the total quantity of smoke in the system at an average that does not
change over time.


On Tue, Mar 18, 2008 at 7:43 PM, <frank.phyllis(at)mindspring.com (frank.phyllis(at)mindspring.com)> wrote:
[quote] --> AeroElectric-List message posted by: <frank.phyllis(at)mindspring.com (frank.phyllis(at)mindspring.com)>

Last evening I experienced smoke in the cockpit of my Kitfox--912S.

First, I want to thank Bob N for convincing me of the importance of
using Z16, incorporating an E-Bus circuit. Worked great and reduced the
load on my "little" motorcycle battery so that I maintained > 11.5 v for
the 15 min duration of my flt.

It was twilight & I had Whelan strobe & nav lights on, near max elec
capacity for the 912 generator. I threw on the landing lt to see what
the added load would do to the system. (Probably not a smart move)
Immediately the system voltage, normally runs 13v, began dropping, so I
turned the landing lt off after a few seconds.

I then began doing a series of steep climbs at slow airspeed. After
about five min I noticed a burning odder, thinking to myself "someone
must be burning trash and I'm in the trail of smoke." After about 30
seconds I noticed smoke coming from under the instrument panel and a
much stronger burning odder. I dropped the nose of the airplane--no
more smoke.

At that moment my GRT EIS warning lt flashed and I noticed the system
voltage below 11 v. I turned on the E Bus switch and off on the main.
Voltage came up--12 v I think. No odder or smoke or falling voltage.

After a few minutes I decided to try the main switch again, pulling in
the battery relay and alternator. Voltage began to climb above 12 v to
about 12.5 v. I added strobe & nav lt again causing an immediate
reversal in voltage trend and warning lt came on again as it plunged
below 11 v. Again I went to E Bus an off main. I landed uneventfully.

My guess is the relay over heated with the momentary excessive
electrical draw (does that happen?) causing the smoke. Any Ideas? I
assume I need to replace the regulator??? What would you recommend as a
replacement regulator/source. Anything else??????

Thanks

Frank
N5929





[b]


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dalexan48(at)dslextreme.c
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PostPosted: Wed Mar 19, 2008 6:12 am    Post subject: Smoke Reply with quote

For those of you out there that own, have owned, may own or have worked on
anything British:

What are the three positions of a Lucas headlight switch?
1) Dim
2) Flicker
3) and Smoke

Now let's not mention Lucas in a aviation newsgroup again...or Microsoft.
The blue screen of death takes on a WHOLE new meaning when you MS powered
glass screen goes belly-up in the scud.

Dale Alexander
Trying to build something, probably never finish it...

________________________________ Message 8
_____________________________________
Quote:


Time: 08:50:01 PM PST US
From: "Sam Hoskins" <shoskins(at)MCHSI.COM>
Subject: Re: Smoke

*Positive ground depends upon proper circuit functioning, the
transmission of negative ions by retention of the visible spectral
manifestation known as "smoke". Smoke is the thing that makes electrical
circuits work; we know this to be true because every time one lets the
smoke out of the electrical system, it stops working. This can be
verified repeatedly through empirical testing.


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jon(at)finleyweb.net
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PostPosted: Wed Mar 19, 2008 6:37 am    Post subject: Smoke Reply with quote

Yeah, no doubt. While we're at it:

1. NEVER fly behind a Lycoming (or pick your most hated brand). They are the most dangerous engine ever built.  I had one die on me in 1961 and have never flown one since.
2. NEVER purchase a Ford (or pick your most hated brand). I owned a 1952 that got horrible mileage and always needed work. They are terrible products.
3. DO NOT operate a computer. I tried to use one once but didn't know what I was doing. It got is so screwed up that it wouldn't work - OBVIOUSLY someone else's fault (pick your most hated vendor).
4. ABSOLUTELY NEVER EVER use a calculator. I had one once that pinched my index finder between the keys - horribly dangerous machines!!
5. STAY AWAY from telephones. Someone called me once trying to sell me something. They are works of Satan and huge time wasters.

Jon
PLEASE do not archive


--


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nuckolls.bob(at)cox.net
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PostPosted: Wed Mar 19, 2008 7:45 am    Post subject: Smoke Reply with quote

At 08:43 PM 3/18/2008 -0400, you wrote:

Quote:


Last evening I experienced smoke in the cockpit of my Kitfox--912S.

First, I want to thank Bob N for convincing me of the importance of
using Z16, incorporating an E-Bus circuit. Worked great and reduced the
load on my "little" motorcycle battery so that I maintained > 11.5 v for
the 15 min duration of my flt.

It was twilight & I had Whelan strobe & nav lights on, near max elec
capacity for the 912 generator. I threw on the landing lt to see what
the added load would do to the system. (Probably not a smart move)
Immediately the system voltage, normally runs 13v, began dropping, so I
turned the landing lt off after a few seconds.

I then began doing a series of steep climbs at slow airspeed. After
about five min I noticed a burning odder, thinking to myself "someone
must be burning trash and I'm in the trail of smoke." After about 30
seconds I noticed smoke coming from under the instrument panel and a
much stronger burning odder. I dropped the nose of the airplane--no
more smoke.

At that moment my GRT EIS warning lt flashed and I noticed the system
voltage below 11 v. I turned on the E Bus switch and off on the main.
Voltage came up--12 v I think. No odder or smoke or falling voltage.

After a few minutes I decided to try the main switch again, pulling in
the battery relay and alternator. Voltage began to climb above 12 v to
about 12.5 v. I added strobe & nav lt again causing an immediate
reversal in voltage trend and warning lt came on again as it plunged
below 11 v. Again I went to E Bus an off main. I landed uneventfully.

My guess is the relay over heated with the momentary excessive
electrical draw (does that happen?) causing the smoke. Any Ideas? I
assume I need to replace the regulator??? What would you recommend as a
replacement regulator/source. Anything else??????

Do we know exactly where the smoke was coming from?
Is the relay visibly damaged or the regulator?

The fact that your voltage started to come up when
you re-energized the alternator suggests that the
rectifier-regulator was not killed. Try making a
hard connection to bypass the control relay and
do a ground run to see if the bus voltage comes
up . . . do this with a fully charged battery
so that you don't have to wait for the alternator
to top off the battery.

If I'm understanding your words, the relay is what
failed. I'd like to get my hands on it for examination.
I'd be pleased to send you a replacement but I suspect
you can find one much faster locally.

Bob . . .

----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------


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tim2542(at)sbcglobal.net
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PostPosted: Wed Mar 19, 2008 4:43 pm    Post subject: Smoke Reply with quote

Lucas was the first to invent intermittent wipers....I'm told
Tim Andres

For those of you out there that own, have owned, may own or have worked on
anything British:

What are the three positions of a Lucas headlight switch?
1) Dim
2) Flicker
3) and Smoke

Now let's not mention Lucas in a aviation newsgroup again...or Microsoft.
The blue screen of death takes on a WHOLE new meaning when you MS powered
glass screen goes belly-up in the scud.

Dale Alexander
Trying to build something, probably never finish it...

________________________________ Message 8
_____________________________________
Quote:


Time: 08:50:01 PM PST US
From: "Sam Hoskins" <shoskins(at)MCHSI.COM>
Subject: Re: Smoke

*Positive ground depends upon proper circuit functioning, the
transmission of negative ions by retention of the visible spectral
manifestation known as "smoke". Smoke is the thing that makes electrical
circuits work; we know this to be true because every time one lets the
smoke out of the electrical system, it stops working. This can be
verified repeatedly through empirical testing.


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jindoguy(at)gmail.com
Guest





PostPosted: Wed Mar 19, 2008 8:09 pm    Post subject: Smoke Reply with quote

Tim, How can you have a discussion of electricity without paying homage to Joseph Lucas, the discoverer of the short circuit? Smile

Rick

On Wed, Mar 19, 2008 at 7:38 PM, Tim Andres <tim2542(at)sbcglobal.net (tim2542(at)sbcglobal.net)> wrote:
[quote]--> AeroElectric-List message posted by: "Tim Andres" <tim2542(at)sbcglobal.net (tim2542(at)sbcglobal.net)>

Lucas was the first to invent intermittent wipers....I'm told
Tim Andres

For those of you out there that own, have owned, may own or have worked on
anything British:

What are the three positions of a Lucas headlight switch?
1) Dim
2) Flicker
3) and Smoke

Now let's not mention Lucas in a aviation newsgroup again...or Microsoft.
The blue screen of death takes on a WHOLE new meaning when you MS powered
glass screen goes belly-up in the scud.

Dale Alexander
Trying to build something, probably never finish it...

________________________________ Message 8
_____________________________________
>
>
> Time: 08:50:01 PM PST US
> From: "Sam Hoskins" <shoskins(at)MCHSI.COM (shoskins(at)MCHSI.COM)>
> Subject: Re: Smoke
>
> *Positive ground depends upon proper circuit functioning, the
> transmission of negative ions by retention of the visible spectral
> manifestation known as "smoke". Smoke is the thing that makes electrical
> circuits work; we know this to be true because every time one lets the
> smoke out of the electrical system, it stops working. This can be
> verified repeatedly through empirical testing.









[b]


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aerobubba(at)earthlink.ne
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PostPosted: Thu Mar 20, 2008 6:35 am    Post subject: Smoke Reply with quote

Let us not forget that Lucas electric is why the Brits drink warm beer...

do not archive!

Glen Matejcek


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rv9jim(at)juno.com
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PostPosted: Thu Mar 20, 2008 10:47 am    Post subject: Smoke Reply with quote

Ah yes, Lucas, the folks who invented darkness
Jim


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frank.phyllis(at)mindspri
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PostPosted: Sat Mar 22, 2008 4:17 pm    Post subject: Smoke Reply with quote

Bob,

Today I ran the engine. I was not sure how to make a "hard connection
to bypass the control relay" as you suggested. So I just operated the
system normally. Minimal load the voltage was initially 11.8 and then
went to 11.9 with the master on "alternator". No further change after
about three minutes. Looks like I may not be getting alternator input??
As I said, normally I get 13 v.

I did not charge the battery before hand.

I pulled the covers off (cowling, etc). The relay appears to be
undamaged. I don't see any signs that would indicate it was "fried".

During the even I was unable to tell exactly where the smoke was
actually coming from--just from under the panel.

I've ordered another relay. I'll plug it in and see what happens. Any
other suggestions?

If it's the relay, I'd be happy to send you the old one.

Thanks for your help.

Frank
N5929

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nuckolls.bob(at)cox.net
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PostPosted: Sun Mar 23, 2008 8:05 am    Post subject: Smoke Reply with quote

At 08:13 PM 3/22/2008 -0400, you wrote:

Quote:


Bob,

Today I ran the engine. I was not sure how to make a "hard connection
to bypass the control relay" as you suggested.

Take the relay out of the circuit. I.e. don't use the
relay to control it, just let the alternator be ON
all the time.

Quote:
So I just operated the
system normally. Minimal load the voltage was initially 11.8 and then
went to 11.9 with the master on "alternator". No further change after
about three minutes. Looks like I may not be getting alternator input??
As I said, normally I get 13 v.

It should certainly be higher than 12v . . . the battery
delivers energy at 12.5 and below, it gets charged at
13.5 and above. Your normal operating voltage should be
around 14.2 to 14.6 volts.

What you've described suggests that alternator is either
(1) not working due to failed rectifier/regulator or
(2) not connected to the system due to a failed relay.
Quote:
I did not charge the battery before hand.

I pulled the covers off (cowling, etc). The relay appears to be
undamaged. I don't see any signs that would indicate it was "fried".

Hmmmm . . . I've never seen the aftermath of one of these
relays going to toast. It has to have happened somewhere,
sometime. Even the big guys go up in flames sometimes. See:

http://www.aeroelectric.com/Pictures/Contactors/6041_Contactor.jpg
http://www.aeroelectric.com/Pictures/Failures/6041_Contactor_Failure.jpg
Quote:
During the even I was unable to tell exactly where the smoke was
actually coming from--just from under the panel.

Where are your regulator and relay mounted? If they're
under the cowl I'm wondering how you got smoke from either
of these devices . . . the engine and people spaces are
supposed to be pretty well isolated from each other.

Quote:
I've ordered another relay. I'll plug it in and see what happens. Any
other suggestions?

Yes, take the relay completely out of the circuit disconnect the
two fat wires from the relay and hook them to each other.
You can cut a little piece of metal (brass is best but a
piece of tin can will work) as shown in:

http://www.aeroelectric.com/Pictures/Tools/Test_Equipment/Relay_Bypass_Test.jpg

The technique here is "divide and conquer" . . . by taking
the relay completely out of the equation, you can quickly
find if it can be eliminated from the possible root causes
of failure. However, at this stage of the investigation,
if you could not see visible damage to the relay, I suspect
that it is not root cause.

Bob . . .


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frank.phyllis(at)mindspri
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PostPosted: Sun Mar 23, 2008 6:07 pm    Post subject: Smoke Reply with quote

I bypassed the control relay as you suggested, Bob. Started off with
voltage matching battery 12.25v and quickly (~15 seconds) climbed to
13v.

I then plugged the control relay back in. Immediately got the same 13v.

I let the engine warm up (5 min). Then set RPM to 3000. Loaded system
with nav lts & strobes and it stayed at 13v.

Seems the problem has gone away. . .for the moment???? Not sure what
else to check.

Wind was a bit high to fly. I'll take it up this week to see what
happens.

(I checked the battery before hand and it was 12.25 v. After all the
testing it was 12.85v)

I'll come up on the net again if I have additional problems--even if I
can figure it out I'll let you know.

Thanks

Frank
N5929

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nuckolls.bob(at)cox.net
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PostPosted: Mon Mar 24, 2008 5:58 am    Post subject: Smoke Reply with quote

At 10:03 PM 3/23/2008 -0400, you wrote:

Quote:


I bypassed the control relay as you suggested, Bob. Started off with
voltage matching battery 12.25v and quickly (~15 seconds) climbed to
13v.

I then plugged the control relay back in. Immediately got the same 13v.

I let the engine warm up (5 min). Then set RPM to 3000. Loaded system
with nav lts & strobes and it stayed at 13v.

Seems the problem has gone away. . .for the moment???? Not sure what
else to check.

Wind was a bit high to fly. I'll take it up this week to see what
happens.

(I checked the battery before hand and it was 12.25 v. After all the
testing it was 12.85v)

I'll come up on the net again if I have additional problems--even if I
can figure it out I'll let you know.

Hmmmm . . . watch your votlage in flight. If it doesn't get to
something over 13.8 volts after you've been flying for awhile
you need to investigate. Try running minimum loads. Everything
OFF for awhile. Do you have a smart charger? Like:

http://tinyurl.com/2z2zta

or

http://tinyurl.com/29f2qp

You need to make sure that you have a topped-off battery
before you start a test flight. One of these critters will
do the job. Then within say 30 minutes after takeoff, your
bus voltage should be just over 14 volts. If not, your
regulator is set too low and you're not going to fully
charge your battery.

Bob . . .


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frank.phyllis(at)mindspri
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PostPosted: Mon Mar 24, 2008 7:00 pm    Post subject: Smoke Reply with quote

Bob
Is there a way to adjust the DUCATI voltage regulator?
Frank

--


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