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1. 12:48 PM - Re: Rotax ignition wiring (jrevens)
2. 01:10 PM - Re: Rotax ignition wiring (jrevens)
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| Subject: | Re: Rotax ignition wiring |
nuckolls.bob(at)aeroelect wrote:
> At 09:12 PM 11/19/2015, you wrote:
>
> >
> > This may be a dumb question, but would using a shielded twisted pair for the
combined ignition control wiring to both modules be OK, or are 2 individual
shielded single conductor wires preferred for some reason? I am basically using
Bob's Z-16 diagram... I am very grateful to have that, Bob!
>
> My pleasure. What you propose would be fine.
> Do you already have some twisted pair 20 or
> 18AWG?
>
>
> Bob . . .
Yes I do, Bob. Not sure if I'll use it, but I was just trying to educate myself
a little further in analyzing if there were any issues with using 2 wires enclosed
in a common shield for this application. I like your suggestion to ground
at the engine only and use the shield for the conductor back to the module.
Thanks to all for the replies.
--------
John Evens
Thorp T-18 N71JE (built & flying)
Kitfox SS7 N27JE (building)
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=449854#449854
Message 2
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| Subject: | Re: Rotax ignition wiring |
rickofudall wrote:
> All, The ignition modules and the pickups together cost almost $4,000 to replace.
A few feet of shielded wire costs what, $1.49? I'd wire it exactly as Rotax
says rather than experiment.
>
> Rick Girard
Yep, those modules and pickups are really stupidly expensive and over-priced. I'm
amazed that someone hasn't come up with a viable aftermarket replacement that
could probably be sold for a fraction of the price and still make a nice profit.
I'm really not trying to "experiment" with this, Rick, but sometimes there is a
little more elegant or simple way to do something that accomplishes the same
result... maybe resulting in less weight, fewer connections, better design from
a "noise" standpoint, etc. I'm not really convinced that doing everything "exactly
as Rotax says..." is always the best that I can do. I've seen a couple
of possible errors in their manuals for the 912 series engines. For instance,
yesterday while studying the latest 912 Installation manual, I noticed the following
on p.4 of section 80-00-00 regarding the starter system - "NOTICE - The
starter relay must be isolated from the aircraft ground". What? I'm not sure
if I'm misunderstanding that or what.
--------
John Evens
Thorp T-18 N71JE (built & flying)
Kitfox SS7 N27JE (building)
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=449856#449856
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