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hasbroucka(at)yahoo.com
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 Posted: Sun Jan 06, 2013 12:48 pm Post subject: Redundant Fuel pump wiring |
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I am beginning a wiring diagram for a Searey Amphibian Rotax 914, needing redundant fuel pumps. Manuf. recommends each pump gets its own wiring, and I agree.
The plan is single battery and internal charging coil only. I like the idea of battery buss, endurance bus and main buss.
Where to source the electric for each is less clear. Seems to me that connecting as close to the battery as possible is best (least points of failure), but do I source them both from the same place? Anywhere else just adds points of failure, and for what good?
Alan Hasbrouck
SeaRey Amphibian, framework and hull assembled (not covered). Working on VFR avionics and wiring (Dynon Skyview full suite). Top Priority is keep it light, and place weight forward!
[quote][b]
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nuckolls.bob(at)aeroelect
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| Posted: Sun Jan 06, 2013 2:22 pm Post subject: Redundant Fuel pump wiring |
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At 02:48 PM 1/6/2013, you wrote:
| Quote: | I am beginning a wiring diagram for a Searey Amphibian Rotax 914, needing redundant fuel pumps. Manuf. recommends each pump gets its own wiring, and I agree.
The plan is single battery and internal charging coil only. I like the idea of battery buss, endurance bus and main buss.
Where to source the electric for each is less clear. Seems to me that connecting as close to the battery as possible is best (least points of failure), but do I source them both from the same place? Anywhere else just adds points of failure, and for what good? |
I'd run them both from the battery bus. Include
indicator lights to show when one is ON. Make
sure that they are included in the shutdown
checklist to insure OFF for parking.
Bob . . . [quote][b]
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nuckolls.bob(at)aeroelect
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| Posted: Mon Jan 07, 2013 8:05 am Post subject: Redundant Fuel pump wiring |
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| Quote: | | Quote: | | Where to source the electric for each is less clear. Seems to me that connecting as close to the battery as possible is best (least points of failure), but do I source them both from the same place? Anywhere else just adds points of failure, and for what good? |
I'd run them both from the battery bus. Include
indicator lights to show when one is ON. Make
sure that they are included in the shutdown
checklist to insure OFF for parking. |
ON FURTHER REFLECTION . . . run one from
the battery bus, the other from the main
bus.
Bob . . . [quote][b]
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hasbroucka(at)yahoo.com
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| Posted: Mon Jan 07, 2013 8:41 am Post subject: Redundant Fuel pump wiring |
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Bob, Care to describe what you are thinking. What advantage is there to having one on the Main Bus?
Alan , HasbrouckA(at)yahoo.com
SeaRey Amphibian, framework and hull assembled (not covered). Working on VFR avionics and wiring (Dynon Skyview full suite). Top Priority is keep it light, and place weight forward!
--
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nuckolls.bob(at)aeroelect
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| Posted: Mon Jan 07, 2013 11:01 am Post subject: Redundant Fuel pump wiring |
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At 10:42 AM 1/7/2013, you wrote:
| Quote: | | Bob, Care to describe what you are thinking. What advantage is there to having one on the Main Bus? |
Independent power paths with no common failure
points.
Bob . . . [quote][b]
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