Today's Message Index:
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1. 04:29 AM - Re: DPDT Toggle switch for BAT and 2 Alternators? (user9253)
2. 08:12 AM - Tube and fabric com ground plane (Tom Chapman)
3. 08:55 AM - Re: Tube and fabric com ground plane (user9253)
4. 10:04 AM - Re: Re: DPDT Toggle switch for BAT and 2 Alternators? (don van santen)
5. 04:03 PM - Re: DPDT Toggle switch for BAT and 2 Alternators? (user9253)
6. 05:10 PM - Re: Re: DPDT Toggle switch for BAT and 2 Alternators? (don van santen)
Message 1
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| Subject: | Re: DPDT Toggle switch for BAT and 2 Alternators? |
In any circuit it is OK to use a smaller fuse than specified as long as it doesn't
nuisance blow. Same is true for a fuselink as long as it doesn't get too
hot or drop too much voltage. It should be OK to use a 14AWG fuselink. But why
not use 16AWG? You could also use the ANL 40 instead of a fuselink. The purpose
of a fuse or fuselink is not to protect the alternator, but to protect
the battery and wires. An alternator does not need to be protected because it
is self current limiting. It can not put out more current than it is capable
of. The connected load determines the current. An alternator will only put
out what the load demands.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=482765#482765
Message 2
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| Subject: | Tube and fabric com ground plane |
I am installing RAMI comm antenna on my tube and fabric high wing
experimental. I've read up on creating a ground plane using adhesive copper
strips. I plan to do a starburst pattern. Several of the copper strips will
need to go over some of the fuselage tubing before continuing on being
adhered to the fabric. Will it be helpful to use the steel tubing as part of
the ground plane?
I could sand off the paint coating on the tubes where the copper strips pass
over them if this would help with the ground plane. (the adhesive used on
the copper strips is supposed to be conductive)
Thoughts?
Thanks!
Tom
Message 3
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| Subject: | Re: Tube and fabric com ground plane |
The steel fuselage tubing can be used for a ground plane if the antenna is located
at a junction of 3 or more tubes. Gluing copper strips to steel tubing is
unlikely to do any good. Adhesive is not usually conductive. Don't count on
it.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=482773#482773
Message 4
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| Subject: | Re: DPDT Toggle switch for BAT and 2 Alternators? |
Thanks Joe, I used to know that. I got fooled by the warning in the B&C
manual that says the standby alternator must be kept below 30 amps to avoid
damage. It is a 40 amp alternator de-rated to 30A.
On Wed, Aug 29, 2018, 04:34 user9253 <fransew@gmail.com> wrote:
>
> In any circuit it is OK to use a smaller fuse than specified as long as it
> doesn't nuisance blow. Same is true for a fuselink as long as it doesn't
> get too hot or drop too much voltage. It should be OK to use a 14AWG
> fuselink. But why not use 16AWG? You could also use the ANL 40 instead of
> a fuselink. The purpose of a fuse or fuselink is not to protect the
> alternator, but to protect the battery and wires. An alternator does not
> need to be protected because it is self current limiting. It can not put
> out more current than it is capable of. The connected load determines the
> current. An alternator will only put out what the load demands.
>
> --------
> Joe Gores
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=482765#482765
>
>
Message 5
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| Subject: | Re: DPDT Toggle switch for BAT and 2 Alternators? |
The danger to alternators is over heating when heavily loaded. A blast tube can
help.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=482783#482783
Message 6
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| Subject: | Re: DPDT Toggle switch for BAT and 2 Alternators? |
Thanks. My load analysis has me below 20a at night vfr and also ifr. After
some hot starts especially those that take longer than usual I have seen as
high as 45a on my primary alt. Have flown this way for over 2 yrs. Do not
see any real issues. Was just wondering why Bob picked 16awg instead of 14
on z12.
On Aug 29, 2018 16:09, "user9253" <fransew@gmail.com> wrote:
The danger to alternators is over heating when heavily loaded. A blast
tube can help.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=482783#482783
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