Today's Message Index:
----------------------
1. 12:36 AM - Re: AeroElectric-List Digest: 5 Msgs - 06/16/12 (Franz Fux)
2. 07:02 AM - OBS resolver signals (Peter Mather)
3. 12:24 PM - Re: Re: Inexpensive CAD software (John Loram)
4. 12:24 PM - Re: Re: Inexpensive CAD Software (John Loram)
5. 02:35 PM - Viking Schematic (user9253)
Message 1
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| Subject: | Re: AeroElectric-List Digest: 5 Msgs - 06/16/12 |
only intermittent access to e-mail until June 19th, in an urgent matter contact
info@lastfrontierheli.com
Message 2
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| Subject: | OBS resolver signals |
Can anyone explain or point me at any documentation that explains the OBS
resolver signals for setting the course on a NAV set, e.g. a King 165.
What I know is the the NAV set produces a rounded off square wave at either
30HZ or 300HZ. The OBS knob then returns two signals representing the sine
and the cosine of the position. So for example sine of 90 degrees is 1 and
cos is zero, sine of 270 degrees is -1 and cos is still 0
What I don't know is whether the returning signals go negative (the older
CDIs use transformer technology so could easily produce negative voltage) or
whether they are referenced to the mid point of the excitation signal and
whether the excitation signal itself goes negative or it just varies between
0 and the reference voltage.
Any help or pointers to docs appreciated - google has failed me.
Thanks
Peter
Message 3
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| Subject: | Re: Inexpensive CAD software |
Solid Edge has extensive import/export capabilities, (largely untested by
me).
-john-
_____
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Henador
Titzoff
Sent: Friday, June 15, 2012 2:22 PM
Subject: RE: AeroElectric-List: Re: Inexpensive CAD software
Are nanoCAD, DraughtSight and Solid Edge Drafting files compatible with
latest and greatest AutoCAD files? How easy or hard is it to migrate
between all of these CAD packages?
Henador Titzoff
Message 4
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| Subject: | Re: Inexpensive CAD Software |
Annoying, isn't? I been renewing for years now 'cause I like the features.
Fortunately their file format can be imported by other CAD programs.
-john-
> -----Original Message-----
> From: owner-aeroelectric-list-server@matronics.com
> [mailto:owner-aeroelectric-list-server@matronics.com] On
> Behalf Of user9253
> Sent: Saturday, June 16, 2012 2:17 AM
> To: aeroelectric-list@matronics.com
> Subject: AeroElectric-List: Re: Inexpensive CAD Software
>
> --> <fran4sew@banyanol.com>
>
> I made drawings using Solid Edge. Months later when I tried
> to open the drawings, Solid Edge said that my license had
> expired. It would not let me look at my drawings unless I
> renewed my license (free). This happened again the following year.
> I got to thinking, what will happen if Solid Edge changes
> their licensing policy or if they go out of business? I will
> not be able to access my drawings. So I switched to
> TurboCad, although it is not very intuitive. I prefer
> programs that are easy to learn without having to read the help files.
> Joe
>
> --------
> Joe Gores
>
Message 5
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| Subject: | Viking Schematic |
I am helping a friend with a schematic for his Viking powered airplane. See the
attached pdf. Is it safe to eliminate the Schottky diode in the lower left
corner? I want to remove the diode because it is one more failure point and I
do not know if it can handle the full load of the main bus, perhaps as much as
25 or 30 amps. The concern is a short in the alternator or starter circuit
(Or is this a remote possibility?) with no way to isolate it without stopping
the electrically dependent engine.
Thanks for any advice.
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=375936#375936
Attachments:
http://forums.matronics.com//files/viking_rv_12e_847.pdf
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