Today's Message Index:
----------------------
1. 01:44 AM - Re: Standard mags: Lycoming (John M Tipton)
2. 05:10 AM - Re: Transponder and/or ADSB Antenna Installation and Radiation (Beauvais)
3. 07:39 PM - Re: Z11 field supply circuit protection (draker)
Message 1
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| Subject: | Re: Standard mags: Lycoming |
I presume my next question is: does a Lycoming that comes via Vans for an RV
come with one or two =98Impulse Coupled=99 mags.
John
Sent from my iPad
----x--O--x----
> On 28 Jul 2020, at 1:38 am, Charlie England <ceengland7@gmail.com> wrote:
>
> =EF=BB
>
>
>> On Mon, Jul 27, 2020 at 8:30 AM John M Tipton <johntiptonuk@hotmail.com> w
rote:
tmail.com>
>>
>> Hi Guys
>>
>> With 'standard' mags as supplied by Lycoming, and an RV9a with ACS Key sw
itch WITHOUT starter position and using 'push switch' to operate starter, sh
ould the engine be started on LEFT MAG ONLY.
>>
>> John
>>
> The engine should be started with the impulse coupled mag 'on' (ungrounded
P lead), and the other P lead grounded. What you describe is how the switc
h *should* operate, but it's easy to verify operation for yourself. Without t
he P leads connected to the switch, Measure resistance from each P lead term
inal to the ground terminal, 1st with the switch 'off', then in 'L', then in
'R'. Both P lead terminals should show dead short to the ground terminal wi
th the switch 'Off'. The 'L' terminal should show an open circuit (infinite
ly high resistance) and the 'R' terminal should show a short to ground with t
he switch in 'L', and the reverse in 'R'. With the switch in 'Both', both te
rminals should show open to the ground terminal. (Don't forget that if you'r
e touching the terminals with your fingers, your body will conduct slightly,
so depending on the meter, you might see some high but not infinite resista
nce when the switch is open.)
>
> The left mag is *typically* the impulse mag, but it's pretty easy to check
. The impulse mag has what appears to be a spacer that's about an inch thick
between the body of the mag and the engine. So the 'taller' mag is the impu
lse mag.
>
> Charlie
>
> Virus-free. www.avast.com
Message 2
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| Subject: | Re: Transponder and/or ADSB Antenna Installation and |
Radiation
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Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=497461#497461
Message 3
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| Subject: | Re: Z11 field supply circuit protection |
Thank you, very informative answer. I erroneously assumed that a breaker or fuse
protected the whole circuit, not just what's downstream from it. Rookie mistake.
About the field supply current: It makes sense that if the field current draw is
accounted for by the alternator's advertised output, then you wouldn't include
it in your energy management calculations. Question is, how do you know if
a particular alternator accounts for it? Is this standard alternator marketing
practice? Do B&C alternators account for it? Will I get 40A out of a 40 or will
I get 40A minus field current?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=497470#497470
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