Today's Message Index:
----------------------
1. 02:56 AM - Re: Where to get a RC heli? (Richard Girard)
2. 04:56 AM - Re: Re: MIL SPEC spoof (R. curtis)
3. 07:24 AM - Re: roll my own transponder antenna? (messydeer)
4. 08:55 AM - Re: Re: roll my own transponder antenna? (Bob McCallum)
5. 08:12 PM - Battery question (Richard Girard)
Message 1
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| Subject: | Re: Where to get a RC heli? |
Please stop sending this spam.
Rick Girard
do not archive
On Sun, Aug 4, 2013 at 9:28 PM, Angus <abel9165@outlook.com> wrote:
>
> I like RC heli very much,share your thought with me.
>
> --------
> http://www.rctophobby.com
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=405942#405942
>
>
--
Zulu Delta
Mk IIIC
Thanks, Homer GBYM
It isn't necessary to have relatives in Kansas City in order to be unhappy.
- Groucho Marx
Message 2
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| Subject: | Re: MIL SPEC spoof |
> I'm curious though as to how one would begin to write a spec which took
> into account "economics and the free market". If you want companies to
> bid, you need spec which is factual, you couldn't just say "brownies such
> as those commonly available in US supermarkets".
This is true, but on the other hand, who needs a 100 page Brownie
spec
generously sprinkled with references to other regulations on every
page,
to the point that a "Philadelphia Lawyer" has a problem with
interpritation.
The proliferation of rules and regulations only speeds the growth of
government and encourages the decline of personal honesty and
integrity.
Roger
do not archive
--
Do you have a slow PC? Try a Free scan http://www.spamfighter.com/SLOW-PCfighter?cid=sigen
Message 3
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| Subject: | Re: roll my own transponder antenna? |
Well, that cheap TED xpdr antenna is backordered. I came up with a few different
lengths, googling. The diagram below shows it's ~2.5" from the ground plane
(aluminum skin). Also read on the sequair site it would be 3.1", but that could
be for a non-aluminum plane.
http://www.seqair.com/skunkworks/Antennas/TpxAntProbs/TpxAntProbs.html
Thanks,
Dan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=405965#405965
Attachments:
http://forums.matronics.com//files/ted_xpdr_diagram_157.gif
Message 4
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| Subject: | Re: roll my own transponder antenna? |
Dan;
I believe the 3.1" dimension on the Sequoia site is the overall length of
the rod not the portion beyond the ground plane, and yes, this is for a
wooden aeroplane with a relatively small ground plane. The article also
speaks to a larger ground plane having some effect on the length.
Bob McC.
> -----Original Message-----
> From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-
> server@matronics.com] On Behalf Of messydeer
> Sent: Monday, August 05, 2013 10:23 AM
> To: aeroelectric-list@matronics.com
> Subject: AeroElectric-List: Re: roll my own transponder antenna?
>
>
> Well, that cheap TED xpdr antenna is backordered. I came up with a few
different
> lengths, googling. The diagram below shows it's ~2.5" from the ground
plane
> (aluminum skin). Also read on the sequair site it would be 3.1", but that
could be for a
> non-aluminum plane.
>
> http://www.seqair.com/skunkworks/Antennas/TpxAntProbs/TpxAntProbs.html
>
> Thanks,
> Dan
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=405965#405965
>
>
>
>
> Attachments:
>
> http://forums.matronics.com//files/ted_xpdr_diagram_157.gif
>
>
>
>
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Message 5
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| Subject: | Battery question |
My understanding is that it takes at least 13.8 volts to charge a 12 volt
battery.
Last Sunday I was using a Schumacher SC 8010A to charge a 12 volt 20 a.h.
AGM battery. The charger started out at 12.5 volts and gradually climbed
until after an hour the display was reading 15.5 volts. I disconnected the
charger even though when I selected percent of charge it indicated 71 %
charged. I used a Fluke VOM to check the battery and it indicated 15.4
volts. The battery was not even warm to the touch so I put the charger back
on and continued charging until the battery was at 95% charge at which time
the charger was still at 15.5 volts. The battery was barely warm to the
touch. Again, with battery disconnected from the charger it tested at 15.4
volts. The battery seemed to work normally when we attempted to start the
engine.
Why would the charger charge at such a rate?
Why would a 12V battery test at 15.4 volts?
Rick Girard
It isn't necessary to have relatives in Kansas City in order to be unhappy.
- Groucho Marx
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