Today's Message Index:
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1. 07:29 AM - Re: testing a coax lead (Robert L. Nuckolls, III)
2. 08:37 AM - Re: Info on MGL Enigma (Jay Hyde)
Message 1
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| Subject: | Re: testing a coax lead |
Shoot me your mailing address and I'll get some
connectors in the mail to you today.
Sorry, I tought I had some rt-angle connectors
in inventory . . . I'm out.
Here's the source I've used for years
http://tinyurl.com/mfp9cfg
takes awhile to get parts but they've
been consistently good. I've just ordered
10 to refurbish my inventory.
http://tinyurl.com/m6ywj9p
Depending on how 'tight' you are for schedule, I
can offer connectors in when my order gets
here . . .will only take a few days longer
than ordering for yourself . . .
Bob . . .
Bob . . .
Message 2
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| Subject: | Info on MGL Enigma |
I have forwarded this to my colleague, who happens to own MGL J. I
call him on Monday to follow up.
Jay
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of
Richard Girard
Sent: 31 May 2014 12:26 AM
Subject: AeroElectric-List: Info on MGL Enigma
While trying to fathom why the CHT readings on the MGL Enigma EFIS had
stopped on my friend's Rotax 912 powered JA Highlander I delved into the
manual for the EFIS and its RDAC unit (the box that all senders report
to before their data is passed along to the EFIS).
On page 6 or so of the RDAC manual there is a picture of the back of the
Enigma with a note that the battery under a rectangular cover should be
changed every two years. Upon removing said cover I discovered a CR2032
lithium battery. I checked its voltage output and found it to be 2.9
volts. A new one that the aircraft owner just happened to have in his
tool kit (he maintains medical equipment for a living) put out 3.3 volts
so we replaced the old one.
More investigation into the setup menus for EFIS revealed that there is
an option for a Rotax sender for the CHT setup and when we checked the
unit we found it had reset to a J type thermocouple. Resetting it to the
Rotax sender solved the problem and the EFIS began reporting good CHT
values.
Curious to find out if the low output of the CR2032 was responsible for
the glitch in the CHT setup I delved into the manual for the EFIS and
could find no reference to it in the manual's table of contents, index,
or during a long skim of its contents. The same was true of the RADC
manual with the exception of the picture and note mentioned earlier.
Now we find that the same thing has happened to the oil pressure
reading. Again the setup has been changed to reflect a different type of
sender, only this time restoring it to the Rotax sender option has not
fixed it. There are two sender options for each of resistive type
senders and voltage type. On either resistive option (the Rotax option
is a resistive sender) the bar graph on the EFIS locks up and does not
read. When I set it to either of the voltage type it then reads but it
reads backward, i.e. as the engine revs up the reading drops and vice
versa.
The oil pressure sender is a VDO unit and I have located it in VDO's
technical offerings online. VDO recommends that the sender be installed
dry with no teflon tape or thread sealant so that it will ground
properly so we have an investigative path when we return to the airplane
this weekend.
MGL has taken the Enigma technical info off line and the aircraft's
owner has not been able to find any information on the CR2032 battery as
to what it does or how to change it properly.
Does anyone out there know about it?
Thanks,
Rick Girard
It isn't necessary to have relatives in Kansas City in order to be
unhappy.
- Groucho Marx
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