Today's Message Index:
----------------------
1. 11:47 AM - Split master switch (Scott Diffenbaugh)
2. 12:03 PM - Re: Ipods at Altitude (Kevin Horton)
3. 02:36 PM - fuse panel orientation (Alex Balic)
4. 02:56 PM - Re: fuse panel orientation (Neville Kilford)
5. 03:03 PM - Re: fuse panel orientation (HCRV6@aol.com)
Message 1
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| Subject: | Split master switch |
--> AeroElectric-List message posted by: "Scott Diffenbaugh" <diff@foothill.net>
Building an RV7A electrical system utilizing AEC's Z-13 design. The bible
notes there is not a need for a Cessna split type master anymore, & Z-13
shows a dual pole single throw switch in its place. In addition, one of
B&C's schematics on their website contains the note: "IMPORTANT -BATTERY
CONTACTOR AND ALTERNATOR SHOULD COME ON AND OFF TOGETHER". During a main
alt failure, isn't there a need to be able to turn on the battery contactor
(while leaving the failed alt field switch off) to activate the main bus for
flaps, landing lights, etc? To further complicate the issue, the below
thread is now running on the matronics RV list where a guy is blowing his
alt field fuse unless he leaves the alt field switch off during start. Can
anyone educate me in this area?
> Just recently my alternator has been acting up.
> Problem: I have vans 35 amp alternator and a cessna style master switch. I
have been flying my RV with setup for 155 hours before the problem occurred.
> With both switches of the master on, I engage the starter and the plane
starts, the alt. field fuse blows. If I turn the alt. switch off and start
the plane then turn the alt. switch of the master on, everything is ok.
> What is causing my fuse to blow?
> Thanks
> John Danielson
> Hi John,
I don't know what is causing the fuse to blow, but if you have the Cessna
Split Master switch I read in Light Plane Maintenance that it is preferable
to start the engine with the Alternator Field "OFF" then once the engine
starts turn the Alternator Field "ON". The reason for this was that it takes
2 amps off the battery power capacity to provide the field with a charge.
This power is not used to start the engine and it does not contribute to
charging the battery until the engine is turning faster. In my -8 I have the
split switch and I start it with the battery only and then switch on the
Alternator Field. This also allows me to check the battery voltage and
verify that the Alternator kicks in by watching the Volts gauge. So what I'm
saying is that I believe it is perfectly acceptable to start with the Alt
Field OFF then turn it on when the engines running.
Good Luck- I would definitely find the cause of the fuse tripping though.
Ed Perry
Scott Diffenbaugh
diff@foothill.net
Message 2
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| Subject: | Re: Ipods at Altitude |
--> AeroElectric-List message posted by: Kevin Horton <khorton01@rogers.com>
>--> AeroElectric-List message posted by: BobsV35B@aol.com
>
>In a message dated 11/7/03 9:44:11 AM Central Standard Time,
>Arthur.Treff@Smartm.com writes:
>Thanks for the heads-up on the iPod, first I"ve heard of this problem. Any
>idea where your info came from about ipods not liking altitude and where I can
>get more on this? I know that the device is a hard disk, and as such it has
>heads that 'fly' over the disc surface at a dimension in the sub micro-inch
>region. I though that disks got into trouble above 25,000', but
>maybe not? Any
>help would be appreciated.
>Good Morning Art,
>
>It came up on The Beech-Owners list.
>
>I will see if I can locate the source, but I don't generally save much.
>
>Old Bob
There has been a bit about this subject on Apple's iPod discussion
boards, and other places on the web:
http://discussions.info.apple.com/WebX?128@165.XeLNaCivl2a.6@.599a1c70
http://discussions.info.apple.com/WebX?14@165.XeLNaCivl2a.10@.599be263/0
http://www.rds.com/doug/weblogs/2003/10/31.html
http://www.macusers.org/forums/showthread.php?threadid=1006
http://www.ipodlounge.com/forums/archive/topic/1140-1.html
http://gallery.ipodlounge.com/source/ipods_world1399.php
Looks like you might be OK up to 13,000 ft or so, but there are no guarantees.
Message 3
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| Subject: | fuse panel orientation |
--> AeroElectric-List message posted by: Alex Balic <alex157@direcway.com>
I am thinking of placing my blade type fuse panels on a hinged board that
would drop down from under the instrument panel for access- this means that
when it is in the usual stowed position, the fuses will be facing down- I
know that they fit in the holders firmly, and it would be unlikely that the
vibration and force of gravity would cause any of them to fall out- but I
wanted some input from anyone else that has mounted this way or has tested
this configuration......
Message 4
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| Subject: | Re: fuse panel orientation |
--> AeroElectric-List message posted by: "Neville Kilford" <nkilford@etravel.org>
Alex,
I had ATC type fuses mounted as you describe in a car for more than 100,000
miles over three years and none of them dropped out or worked loose.
Cheers
Nev
--
Jodel D-150 in progress
UK
----- Original Message -----
From: "Alex Balic" <alex157@direcway.com>
Subject: AeroElectric-List: fuse panel orientation
> --> AeroElectric-List message posted by: Alex Balic <alex157@direcway.com>
>
> I am thinking of placing my blade type fuse panels on a hinged board that
> would drop down from under the instrument panel for access- this means that
> when it is in the usual stowed position, the fuses will be facing down- I
> know that they fit in the holders firmly, and it would be unlikely that the
> vibration and force of gravity would cause any of them to fall out- but I
> wanted some input from anyone else that has mounted this way or has tested
> this configuration......
>
Message 5
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| Subject: | Re: fuse panel orientation |
--> AeroElectric-List message posted by: HCRV6@aol.com
In a message dated 11/9/03 2:37:24 PM Pacific Standard Time,
alex157@direcway.com writes:
<< am thinking of placing my blade type fuse panels on a hinged board that
would drop down from under the instrument panel for access- this means that
when it is in the usual stowed position, the fuses will be facing down- >>
Not sure what you are building but in my -6 slider I hinged the fuse panel to
the subpanel. In the stowed position the fuses are upright and when the
panel is down they face aft for service, but they are about 7 inches farther
forward than if the fuse panel was hinged to the instrument panel itself. IMO
this
seemed to be a good trade off vs having the fuses hanging down.
Harry Crosby
Pleasanton, California
RV-6, firewall forward
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