nuckolls.bob(at)aeroelect
Guest
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 Posted: Sun Dec 11, 2016 11:24 am Post subject: On other topics. |
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| Quote: | | Building an RV-10 and working on wiring following Z-12 with 60 amp main alternator from B & C, and 30A backup alternator also from B&C. Planning on using the mythical 6-cyl P-Mags, but in the meantime will be setting up shower of sparks as I have that on hand. A couple of questions regarding switches. As I look at the endurance bus, I am trying to figure out what is an appropriate switch to use, I am looking at putting the GTN 650, a G3X display, flap motor, fuel pump, and landing lights on the endurance bus. While the 650 can be a large draw, that is only while transmitting, similar with the fuel pump and flap motor. Lights would only be for a few minutes on landing. But in total these could be a large draw for short periods of time, what is an appropriate switch to use for the endurance bus, typical toggle switches I see are rated at no more that 15 – 20 amps. I really don’t want to use one of the pull switches. |
See http://tinyurl.com/z22xf8q
Laboratory performance ratings for switches are
almost totally irrelevant in the single engine
light aircraft that sees perhaps 100 flight cycles
per year MAX. The Carling toggles offered by B&C
and others are suited for any of the RV10's appliance
loads.
| Quote: | | A similar question for an avionics bus, while I know this is not needed to protect the avionics, I have been advised it is a good idea so that there is minimal battery drain while starting the plane, after start you flip the avionics master to turn on the majority of the avionics. |
. . . old flyer's prophylactic having roots in a time
when radios were fitted with vacuum tubes and
electro-mechanical power supplies. Also a time when
airplanes were cranked with rather soggy, flooded, lead-
acid batteries.
[img]cid:.0[/img]
The avionics master (like the Kettering spark
system) is a feature we can appreciate for its
value at the time . . . but happily discarded
when that value diminishes and gets replaced by
something better. See http://tinyurl.com/jn6gykz
[img]cid:.1[/img]
Bob . . .
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