Today's Message Index:
----------------------
1. 05:47 AM - Re: Battery maintainers (Charlie England)
2. 08:28 AM - Re: AT-6C ballast resistor? (Robert L. Nuckolls, III)
3. 08:51 AM - Re: AT-6C ballast resistor? (Nigel Willson)
4. 12:06 PM - Re: AT-6C ballast resistor? (Nigel Willson)
5. 12:23 PM - Re: AT-6C ballast resistor? (Robert L. Nuckolls, III)
6. 12:33 PM - Re: AT-6C ballast resistor? (Nigel Willson)
7. 12:36 PM - Re: AT-6C ballast resistor? (Charlie England)
8. 12:43 PM - Re: AT-6C ballast resistor? (Nigel Willson)
9. 01:25 PM - Re: AT-6C ballast resistor? (Robert L. Nuckolls, III)
10. 06:58 PM - Re: AT-6C ballast resistor? (Robert L. Nuckolls, III)
Message 1
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| Subject: | Re: Battery maintainers |
Unless you only fly twice a year, plug your charger money into avgas=2E
:-)
=81=A3Sent from BlueMail =8B
On Jul 23, 2019, 11:19 PM, at 11:1
9 PM, Ron Burnett <ronburnett@charter=2Enet> wrote:
>--> AeroElectric-List
message posted by: Ron Burnett
><ronburnett@charter=2Enet>
>
>Am at OSH and
got the impressive presentation of Battery Saver
>#3015-LCD
>
>Maintains l
arger vehicles with up to two batteries
>Quickly charges weak batteries
>
Pulse cleaning mode improves battery condition with continued use
>Automati
cally works with 6&12 volt lead acid batteries
>Built in LCD tester displa
ys voltage, amp output and battery percentage
>bar
>
>I have two Oddessy PC
-680 batteries which need keeping at peak for an
>electric dual EFII system
=2E
>
>Anyone have this unit or a knowledgeable suggestion?
>
>Thanks,
>
>R
on Burnett
>RV-6A
>
>May you have the Lord's blessings today!
>Sent from m
y iPad
>
=============
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uch much more:
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Message 2
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| Subject: | Re: AT-6C ballast resistor? |
At 11:19 AM 7/23/2019, you wrote:
>All,
>
>Am looking for help.
>
>We have a Harvard (AT-6C).
>
>There is what allegedly is called a ballast resistor that sits in an
>externally accessible electrical box on the left hand side of the
>fuselage above the left wing leading edge. That box also contains
>the carbon pile rectified amongst other things.
>
>Twice now, this ballast resistor has failed in a thermic way.....
>(replaced, and replacement failed after about 10 hours).
Do you still have a failed part? Can you share a picture?
>When this fails, on activating battery master, there is no power to
>the main 28v bus..... only power from battery to starter motor. 28v
>bus only becomes energised when generator kicks in. Battery does not charge.
>
>Can anyone enlighten what this resistor is for? Rumour has it that
>it was only to protect old style avionics. If this is the case,
>would it be safe to remove it since we have modern avionics in the aircraft.
Do you have a wiring diagram for this airplane?
Have you availed yourself of the documentation
library on this aircraft available at:
https://tinyurl.com/y4bclrc2
>Problem us that we are having difficulty sourcing a further
>replacement, so the aircraft is unserviceable until a solution is found.
There are no doubt dozens of suitable
replacements. But without knowing the form,
fit and function of this part, making a
selection is impossible.
>Is there a modern replacement or mod that anyone knows of?
>
>I'm led to believe its 125 ohm, but have no other information than
>that (and it's a 28v generator based system)
Does the failed part have any markings on it?
Bob . . .
Message 3
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| Subject: | AT-6C ballast resistor? |
Hi Bob,
Yes we have diagrams.....
I'll send picture in next email, but the part concerned is:
PART No: COIEK
125 Ohms
125 Watt
Regards,
Nigel Willson
Flying Instructor & Examiner | Airshow Organiser | Display Pilot
[cid:image002.jpg@01D5423F.D4696EF0]
[cid:image004.png@01D5423F.D4696EF0]
Mobile:
+44 (0)7809 116676
[cid:image010.png@01D5423F.D4696EF0]
[cid:image012.png@01D5423F.D4696EF0]
Email:
nigel@easyppl.com<mailto:nigel@easyppl.com>
[cid:image018.png@01D5423F.D4696EF0]
Web:
http://easyppl.com
http://greatbritishairshows.com
http://yakdisplay.com<http://yakdisplay.com/>
From: owner-aeroelectric-list-server@matronics.com <owner-aeroelectric-list
-server@matronics.com> On Behalf Of Robert L. Nuckolls, III
Sent: 24 July 2019 16:26
Subject: Re: AeroElectric-List: AT-6C ballast resistor?
At 11:19 AM 7/23/2019, you wrote:
All,
Am looking for help.
We have a Harvard (AT-6C).
There is what allegedly is called a ballast resistor that sits in an extern
ally accessible electrical box on the left hand side of the fuselage above
the left wing leading edge. That box also contains the carbon pile rectifie
d amongst other things.
Twice now, this ballast resistor has failed in a thermic way..... (replaced
, and replacement failed after about 10 hours).
Do you still have a failed part? Can you share a picture?
When this fails, on activating battery master, there is no power to the mai
n 28v bus..... only power from battery to starter motor. 28v bus only becom
es energised when generator kicks in. Battery does not charge.
Can anyone enlighten what this resistor is for? Rumour has it that it was o
nly to protect old style avionics. If this is the case, would it be safe to
remove it since we have modern avionics in the aircraft.
Do you have a wiring diagram for this airplane?
Have you availed yourself of the documentation
library on this aircraft available at:
https://tinyurl.com/y4bclrc2
Problem us that we are having difficulty sourcing a further replacement, so
the aircraft is unserviceable until a solution is found.
There are no doubt dozens of suitable
replacements. But without knowing the form,
fit and function of this part, making a
selection is impossible.
Is there a modern replacement or mod that anyone knows of?
I'm led to believe its 125 ohm, but have no other information than that (an
d it's a 28v generator based system)
Does the failed part have any markings on it?
Bob . . .
Message 4
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| Subject: | Re: AT-6C ballast resistor? |
Bob,
Here is the picture of the resistor....
Regards,
Nigel Willson
Flying Instructor & Examiner | Airshow Organiser | Display Pilot
[X]
[X]
Mobile:
+44 (0)7809 116676<tel:+44%20(0)7809%20116676>
[X]
[X]
Email:
nigel@easyppl.com<mailto:nigel@easyppl.com>
[X]
Web:
http://easyppl.com
http://greatbritishairshows.com
http://yakdisplay.com<http://yakdisplay.com/>
Sent from my Samsung Galaxy S9 - Powered by Three
-------- Original message --------
From: Nigel Willson <nigel@easyppl.com>
Subject: RE: AeroElectric-List: AT-6C ballast resistor?
Hi Bob,
Yes we have diagrams.....
I'll send picture in next email, but the part concerned is:
PART No: COIEK
125 Ohms
125 Watt
Regards,
Nigel Willson
Flying Instructor & Examiner | Airshow Organiser | Display Pilot
[cid:image002.jpg@01D5423F.D4696EF0]
[cid:image004.png@01D5423F.D4696EF0]
Mobile:
+44 (0)7809 116676
[cid:image010.png@01D5423F.D4696EF0]
[cid:image012.png@01D5423F.D4696EF0]
Email:
nigel@easyppl.com<mailto:nigel@easyppl.com>
[cid:image018.png@01D5423F.D4696EF0]
Web:
http://easyppl.com
http://greatbritishairshows.com
http://yakdisplay.com<http://yakdisplay.com/>
From: owner-aeroelectric-list-server@matronics.com <owner-aeroelectric-list
-server@matronics.com> On Behalf Of Robert L. Nuckolls, III
Sent: 24 July 2019 16:26
Subject: Re: AeroElectric-List: AT-6C ballast resistor?
At 11:19 AM 7/23/2019, you wrote:
All,
Am looking for help.
We have a Harvard (AT-6C).
There is what allegedly is called a ballast resistor that sits in an extern
ally accessible electrical box on the left hand side of the fuselage above
the left wing leading edge. That box also contains the carbon pile rectifie
d amongst other things.
Twice now, this ballast resistor has failed in a thermic way..... (replaced
, and replacement failed after about 10 hours).
Do you still have a failed part? Can you share a picture?
When this fails, on activating battery master, there is no power to the mai
n 28v bus..... only power from battery to starter motor. 28v bus only becom
es energised when generator kicks in. Battery does not charge.
Can anyone enlighten what this resistor is for? Rumour has it that it was o
nly to protect old style avionics. If this is the case, would it be safe to
remove it since we have modern avionics in the aircraft.
Do you have a wiring diagram for this airplane?
Have you availed yourself of the documentation
library on this aircraft available at:
https://tinyurl.com/y4bclrc2
Problem us that we are having difficulty sourcing a further replacement, so
the aircraft is unserviceable until a solution is found.
There are no doubt dozens of suitable
replacements. But without knowing the form,
fit and function of this part, making a
selection is impossible.
Is there a modern replacement or mod that anyone knows of?
I'm led to believe its 125 ohm, but have no other information than that (an
d it's a 28v generator based system)
Does the failed part have any markings on it?
Bob . . .
Message 5
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| Subject: | AT-6C ballast resistor? |
At 10:50 AM 7/24/2019, you wrote:
>Hi Bob,
>
>
>PART No: COIEK
>125 Ohms
>125 Watt
>
>
Hmmm . . . I seem to recall that COIEK is
a old-line resistor manufacturer . . .
Emacs!
A resistor of that size would look about
like this?
28 volts applied to a 125 ohm resistor
dissipates only 6 watts. I'm having
trouble imagining how a resistor of
that size gets overheated in a 28v system.
Bob . . .
Message 6
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| Subject: | Re: AT-6C ballast resistor? |
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bmcgdG8gZmluZCBvbmUgb3IgZXF1aXZhbGVudCB0byBwdXQgdGhlIHRoaW5nIGJhY2sgdG9nZXRo
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biBhIDI4diBzeXN0ZW0uDQoNCg0KDQogIEJvYiAuIC4gLg0K
Message 7
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| Subject: | Re: AT-6C ballast resistor? |
The pic shows multiple taps; looks like some of the individual segments
could easily be as low as around 20 ohms. Those are some really fat looking
conductors attached to it, too.
Charlie
On Wed, Jul 24, 2019 at 2:28 PM Robert L. Nuckolls, III <
nuckolls.bob@aeroelectric.com> wrote:
> At 10:50 AM 7/24/2019, you wrote:
>
> Hi Bob,
>
>
> PART No: COIEK
> 125 Ohms
> 125 Watt
>
>
> Hmmm . . . I seem to recall that COIEK is
> a old-line resistor manufacturer . . .
> [image: Emacs!]
>
> A resistor of that size would look about
> like this?
>
> 28 volts applied to a 125 ohm resistor
> dissipates only 6 watts. I'm having
> trouble imagining how a resistor of
> that size gets overheated in a 28v system.
>
>
> Bob . . .
>
Message 8
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| Subject: | Re: AT-6C ballast resistor? |
No. They are not multiple taps, just a connector sited beneath the resistor
....
Regards,
Nigel Willson
Flying Instructor & Examiner | Airshow Organiser | Display Pilot
[X]
[X]
Mobile:
+44 (0)7809 116676<tel:+44%20(0)7809%20116676>
[X]
[X]
Email:
nigel@easyppl.com<mailto:nigel@easyppl.com>
[X]
Web:
http://easyppl.com
http://greatbritishairshows.com
http://yakdisplay.com<http://yakdisplay.com/>
Sent from my Samsung Galaxy S9 - Powered by Three
-------- Original message --------
From: Charlie England <ceengland7@gmail.com>
Subject: Re: AeroElectric-List: AT-6C ballast resistor?
The pic shows multiple taps; looks like some of the individual segments cou
ld easily be as low as around 20 ohms. Those are some really fat looking co
nductors attached to it, too.
Charlie
On Wed, Jul 24, 2019 at 2:28 PM Robert L. Nuckolls, III <nuckolls.bob@aeroe
lectric.com<mailto:nuckolls.bob@aeroelectric.com>> wrote:
At 10:50 AM 7/24/2019, you wrote:
Hi Bob,
PART No: COIEK
125 Ohms
125 Watt
Hmmm . . . I seem to recall that COIEK is
a old-line resistor manufacturer . . .
[Emacs!]
A resistor of that size would look about
like this?
28 volts applied to a 125 ohm resistor
dissipates only 6 watts. I'm having
trouble imagining how a resistor of
that size gets overheated in a 28v system.
Bob . . .
Message 9
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| Subject: | AT-6C ballast resistor? |
At 10:50 AM 7/24/2019, you wrote:
>Hi Bob,
>
>
>PART No: COIEK
>125 Ohms
>125 Watt
>
>
Hmmm . . . I seem to recall that COIEK is
a old-line resistor manufacturer . . .
Emacs!
A resistor of that size would look about
like this?
28 volts applied to a 125 ohm resistor
dissipates only 6 watts. I'm having
trouble imagining how a resistor of
that size gets overheated in a 28v system.
Bob . . .
Message 10
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| Subject: | Re: AT-6C ballast resistor? |
At 01:42 PM 7/24/2019, you wrote:
>Bob,
>
>Here is the picture of the resistor....
Hmmm . . . that's in no way a 125 ohm
resistor. When they are wound with ribbon
wire on edge, it's more likely to be 12.5
ohms or even 1.25 ohms.
Will need to see the wiring diagram where
this device is incorporated before I can
be of much help.
If the last replacement lasted only a few
hours, then something is broke . . . need
to figure out what this resistor is supposed
to do.
Bob . . .
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