Today's Message Index:
----------------------
1. 06:40 AM - Re: Re: Z19 first try and smoke/wire melted I did a mistake (Robert L. Nuckolls, III)
2. 10:38 AM - Re: Z19 first try and smoke/wire melted I did a mistake (Achille)
3. 12:17 PM - Re: Alternator Noise When Touching Metal Airframe Grounds (Jared Yates)
4. 01:51 PM - Re: Alternator Noise When Touching Metal Airframe Grounds (Robert L. Nuckolls, III)
5. 01:54 PM - Re: Re: Z19 first try and smoke/wire melted I did a mistake (Robert L. Nuckolls, III)
6. 02:07 PM - Re: Re: Rotax Charging System (William Daniell)
7. 03:38 PM - Re: Rotax Charging System (user9253)
8. 07:28 PM - Re: Rotax Charging System (user9253)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Z19 first try and smoke/wire melted I did |
a mistake
At 03:52 PM 6/17/2018, you wrote:
>
>It does not matter what kind of arc suppression device is in
>parallel with the contactor coil. That coil is going to energize
>when the switch is turned on (unless the master switch wire burns
>open). A diode in series with the contactor coil would prevent it
>from being energized by a reverse polarity battery. If a builder
>were concerned about reverse polarity, two diodes could be used, one
>in parallel with the coil and one in series. But what about
>protection against line boys with 24 volt jumper cables?
Yeah, I had a line-crew feller hook 28v to my 14v
172XP for a start assist on a -5C morning in KC.
He had his back turned to me and the WWII surplus,
gas driven generator was pretty noisy so yelling
was futile.
I hit the starter and got a really energetic engine
start. Only then did he hit the disconnect switch
never having looked at me. I wanted to get out and
. . . well . . . but that would have called for
stopping the engine. A quick check of the panel didn't
show evidence of damage so I chalked it up to experience
and future planning:
Me: You know this is a 14v airplane, right?
LB: Sure
Me: you know that you're not to take your eyes off
me, or take your fingers off the switch at any
time external power is on the airplane?
LB: Yeah, sure.
Me: You know that power doesn't go ON until I give
you a thumbs up?
LB: I can do that.
Me; You know that thumbs down means turn it OFF?
Lb: Okay.
Me: You're a bright fellow.
Then I tip him $5 and invite him to have a beer
on me.
REAL airplanes have ground power jacks fitted with
polarity protection, ov protection and CREW CONTROLLED
ground power contactors.
https://goo.gl/xzixnk
https://goo.gl/CbPgUw
Bob . . .
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Z19 first try and smoke/wire melted I did a mistake |
I will advise you this weekend I will asses.
The contactor wire is the only one that is alone, so it will be easy to change
it if it's the only one that could be damage. In my mind it don't keep clear my
mistake that it do du to lack of knowledge. I will see.
For the protection i checked user manuel the only one things that have a protection
for reversal is my old becker AR3201 that I have to change it before august
2018 du to eupean rules..
I hope you have right bob and I have no doubt. Just i did the quote in case of...
I was thinking about one things. My ignitions have the case grounded and have the
ground wire, both are grounded on the ground buses. I don't have short cut
the ignition module ?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=480966#480966
Attachments:
http://forums.matronics.com//files/capture_decran_2018_06_18_a_193042_250.png
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Alternator Noise When Touching Metal Airframe Grounds |
Thanks Bob and everyone, I'm back with new data, having returned to the
airplane and flown it today.
Disregard what I said before about the volume- the noise is not impacted by
the local headset volume or by the intercom volume, or the 430 volume. It
seems to be not adjustable at all. It does not seem to be present when the
engine is not running, but then again the alternator noise is the majority
of the noise, and it would not be present with the engine off.
On Tue, Jun 12, 2018 at 6:13 PM, Robert L. Nuckolls, III <
nuckolls.bob@aeroelectric.com> wrote:
> At 03:01 PM 6/12/2018, you wrote:
>
> Yes, and also a gns430w and skyview system.
>
>
> Just for grins . . . try unplugging the
> data cable between the intercom/controll
> panel and the remote transceiver . . . and
> see if the noise is affected.
>
> Oh yeah, are you sure it's alternator whine . . .
> pitch rises and falls with engine rpm?
>
>
> Bob . . .
>
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Alternator Noise When Touching Metal Airframe |
Grounds
At 02:16 PM 6/18/2018, you wrote:
>Thanks Bob and everyone, I'm back with new data, having returned to
>the airplane and flown it today.
>
>Disregard what I said before about the volume- the noise is not
>impacted by the local headset volume or by the intercom volume, or
>the 430 volume. It seems to be not adjustable at all. It does not
>seem to be present when the engine is not running, but then again
>the alternator noise is the majority of the noise, and it would not
>be present with the engine off.
Are these headsets noise canceling? I.e. fitted with
electronics of some kind? I was looking for Bose X
Model info on the 'net with no success for the quick
look-see.
Bob . . .
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Z19 first try and smoke/wire melted I did |
a mistake
At 12:38 PM 6/18/2018, you wrote:
>
>I will advise you this weekend I will asses.
>
>The contactor wire is the only one that is alone, so it will be easy
>to change it if it's the only one that could be damage. In my mind
>it don't keep clear my mistake that it do du to lack of knowledge. I will see.
The only OTHER wires at risk would be those
tightly bundled with the damaged wire. Even
so, the 'damage' may be limited to staining
of the insulation. If there are no wires in close
proximity to the damaged one, then you're
home almost free.
Bob . . .
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Rotax Charging System |
Joe,
can you confirm wiring for the JD voltage regulator please.
B+ = DC + output to capacitor and system
AC = yellow wires from generator
L = indicator light
IGW = master?
is that right?
thanks
Will
William Daniell
LONGPORT
+57 310 295 0744
On Sun, Jun 10, 2018 at 11:03 AM, user9253 <fransew@gmail.com> wrote:
>
> Ken,
> While I have great respect for Mike M. and admire his knowledge, I do
> disagree with that ending statement. Heat caused by high current can
> damage alternator windings. But the total current is determined by the
> load, not by the regulator. I do not think that the Silent Hektik
> regulator will stress the alternator any more than the Ducati regulator.
> Two years ago I replaced the Ducati regulator in my RV-12 with a cheap
> John Deere regulator from eBay. I made an adapter plate using 1/8"
> aluminum because the mounting holes did not line up. I used heat
> conductive grease on both sides of the mounting plate. A thermocouple
> attached to the John Deere regulator measured a maximum temperature of 157
> degrees Fahrenheit on a 90+ degree day.
>
> --------
> Joe Gores
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=480768#480768
>
>
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Rotax Charging System |
Will,
Yes, you are correct.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=480974#480974
Message 8
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Rotax Charging System |
Use heat conductive paste between the regulator and aluminum airframe or heat sink.
The regulator case should be well grounded. Some installers connect a ground
wire to one of the mounting bolts. Forced air cooling will prolong regulator
life.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=480977#480977
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|