Today's Message Index:
----------------------
1. 07:15 AM - Re: RotaxEngines-List Digest: 2 Msgs - 09/18/20 (M. A. R.)
2. 09:33 AM - Soft start (david park)
3. 11:33 AM - Re: Soft start (Guy Buchanan)
Message 1
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| Subject: | Re: RotaxEngines-List Digest: 2 Msgs - 09/18/20 |
I=99m no longer in the market for an engine. Please remove me from yo
ur list.
Thanks!!
On Sat, Sep 19, 2020 at 2:46 AM RotaxEngines-List Digest Server <
rotaxengines-list@matronics.com> wrote:
> *
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> RotaxEngines-List Digest Archive
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> ---
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> Total Messages Posted Fri 09/18/20: 2
>
> ----------------------------------------------------------
>
>
> Today's Message Index:
>
> ----------------------
>
>
> 1. 07:20 PM - Rotax 912 Eating Ignition Modules (Guy Buchanan)
>
> 2. 07:27 PM - Re: Rotax 912 Eating Ignition Modules (william
> sullivan)
>
>
> ________________________________ Message 1
> _____________________________________
>
>
> Time: 07:20:05 PM PST US
>
> Subject: RotaxEngines-List: Rotax 912 Eating Ignition Modules
>
> From: "Guy Buchanan" <gebuchanan@cox.net>
>
>
> A friend has a 912uls in a Kitfox that seems to be eating ignition
> modules. He's
>
> gone through three. Yes they were all old. Yes new ones work, but we're
> worried
>
> that maybe his plane is producing electrical noise detrimental to the
> modules.
>
> We did some testing using an oscilloscope looking for voltage spikes in t
he
>
> ground wire during start up and shutoff. For various reasons we weren't
> able
>
> to capture any voltage spikes during start and stop, but did capture some
> very
>
> messy noise signatures while running. Picture 1 shows one module's ground
> wire
>
> while "open". Note +/- 30V peaks and a regular 30hz sawtooth. Picture 2
> shows
>
> the same ground "grounded". We did some further testing of the input and
> output
>
> to the voltage regulator and those voltages appeared relatively clean.
> Question:
>
> is it possible the ignition module is being damaged by the voltage noise,
>
> regardless of source? Should we apply some caps to the ground wires to ki
ll
>
> the noise?
>
>
> Thanks,
>
>
> --------
>
> Guy Buchanan
>
> K-IV 1200 / 912Uls / Warp / 500 hours and flying again.
>
> Now a glider pilot too.
>
>
> Read this topic online here:
>
>
> http://forums.matronics.com/viewtopic.php?p=498422#498422
>
>
> Attachments:
>
>
> http://forums.matronics.com//files/labnation_screenshot2_112.png
>
> http://forums.matronics.com//files/labnation_screenshot0_140.png
>
>
> ________________________________ Message 2
> _____________________________________
>
>
> Time: 07:27:33 PM PST US
>
> From: william sullivan <williamtsullivan@att.net>
>
> Subject: Re: RotaxEngines-List: Rotax 912 Eating Ignition Modules
>
>
> My gut instinct says clean and tighten all grounds. If a component groun
ds
>
> through it's base, take off the unit and clean and ground the contact ar
ea
>
> . Good luck!
>
>
> Bill Sullivan
>
>
> On Friday, September 18, 2020, 10:21:35 PM EDT, Guy Buchanan <gebuch
an
>
> an@cox.net> wrote:
>
>
> t>
>
>
> A friend has a 912uls in a Kitfox that seems to be eating ignition module
s.
>
> He's gone through three. Yes they were all old. Yes new ones work, but w
e'
>
> re worried that maybe his plane is producing electrical noise detrimental
t
>
> o the modules. We did some testing using an oscilloscope looking for volt
ag
>
> e spikes in the ground wire during start up and shutoff. For various reas
on
>
> s we weren't able to capture any voltage spikes during start and stop, bu
t
>
> did capture some very messy noise signatures while running. Picture 1 sho
ws
>
> one module's ground wire while "open". Note +/- 30V peaks and a regular
30
>
> hz sawtooth. Picture 2 shows the same ground "grounded". We did some furt
he
>
> r testing of the input and output to the voltage regulator and those volt
ag
>
> es appeared relatively clean. Question: is it possible the ignition modul
e
>
> is being damaged by the voltage noise, regardless of source? Should we ap
pl
>
> y some caps to the ground wires to kill the noise?
>
>
> Thanks,
>
>
> --------
>
> Guy Buchanan
>
> K-IV 1200 / 912Uls / Warp / 500 hours and flying again.
>
> Now a glider pilot too.
>
>
> Read this topic online here:
>
>
> http://forums.matronics.com/viewtopic.php?p=498422#498422
>
>
> Attachments:
>
>
> http://forums.matronics.com//files/labnation_screenshot2_112.png
>
> http://forums.matronics.com//files/labnation_screenshot0_140.png
>
>
> -
>
> S -
>
> WIKI -
>
> -
>
> =C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin.
>
>
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>
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Message 2
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I have just fitted two new soft start modules to my Rotax 912ULS. Should they both
be activated by the start switch and start on both modules. or select only
one module to start then activate the second by going to both. I have only wired
up one module at the moment but have installed wire to be used from the second
module if it is ok to do so.?
Any experts out there?
G-LDVO
Dave Park
Dave Park
Message 3
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No expert, but I started on one.
Guy Buchanan
Ramona, CA
Deceased Kitfox IV-1200 / 912-S / Warp 3cs / 600 hrs
Glider pilot, too
On 9/19/2020 9:32 AM, david park wrote:
>
> I have just fitted two new soft start modules to my Rotax 912ULS. Should they
both be activated by the start switch and start on both modules. or select only
one module to start then activate the second by going to both. I have only
wired up one module at the moment but have installed wire to be used from the
second module if it is ok to do so.?
> Any experts out there?
> G-LDVO
>
> Dave Park
>
> Dave Park
>
>
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