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Old 01-29-2019, 12:28 AM
Blowfly Blowfly is offline
Join Date: Dec 2012
Location: Sale, Victoria, Australia
Posts: 15
Default Circuit Breaker sizes?

Would anyone be able to advise me on the correct circuit breaker values for the standard RV4 electric trim and electric flaps? Simple question I know, however despite much searching, I have not been able to find them. Thanks in advance...!!
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Old 01-29-2019, 05:57 AM
Larry DeCamp's Avatar
Larry DeCamp Larry DeCamp is offline
Join Date: Apr 2010
Location: Clinton, Indiana
Posts: 815
Default Flap CB

I recently got some great input on this subject. Look it up in my posts. Bottom line there was agreement on 10A breaker even though the flaps draw 3A.
Larry DeCamp
RV-3B flying w/ carb / Pmags / Catto 2b / Steam
RV-4 fastback w/ Superior XP360/AFP/G3X/CPI/Catto3b
Clinton, IN
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Old 01-29-2019, 07:03 AM
mulde35d's Avatar
mulde35d mulde35d is offline
Join Date: Dec 2017
Location: Williamsburg, VA
Posts: 137
Default CB Size

Just remember, the more important question is what size electrical wire runs between your CB and the trim or flap.
RV-14A - N122X (probably)
Empennage Complete
Wings in Progress
Research on-going
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Old 01-29-2019, 08:44 AM
Marc Bourget Marc Bourget is offline
Join Date: Apr 2009
Location: Stockton, California
Posts: 209

Quick rule of thumb for future reference - for the less knowledgeable.

Breakers sized for (to protect) the conductor.

Conductors are sized for the load.

Why the difference here?

Motors have a starting "inrush current" factor, variously reporting from 2.5(x) and higher. So, 10A seems appropriate for a 3A flap motor.

Further clarification is on the reader.
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Old 01-29-2019, 01:12 PM
Blowfly Blowfly is offline
Join Date: Dec 2012
Location: Sale, Victoria, Australia
Posts: 15

Thanks to all for the valuable info....

Larry I have looked through your excellent posts and still can't locate a couple of values such as:
Electric trim (standard Vans issue)
Starter (Vans lightweight 0-320 version)

Any futher help would be greatly appreciated.
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