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  #1  
Old 05-27-2018, 06:34 PM
Lars Lars is offline
 
Join Date: Nov 2005
Location: Davis, CA
Posts: 1,027
Default Novel alternator circuit protection

I'm not sure if this qualifies as a safety item, but it certainly is an oddball. Had an RV in our shop for an unrelated issue that required cowl removal, which led to us having a look around, and we spotted this. The builder (not the owner of the airplane) had installed an ANL current limiter base in the B lead circuit for the alternator, but rather than spend the princely sum of $15 or so for a proper current limiter, the gadget in the photos below was assembled from a combo of a blade fuse and some brass sheet. Arguably the slow blow fuse shown in the photos has similar, though not identical properties to the current limiter that would fit in the base, but still. Cheapskate or ...?



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  #2  
Old 05-27-2018, 06:47 PM
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Mike S Mike S is offline
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Location: Dayton Airpark, NV A34
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Default

Creative?

Innovative?

Field repair that they just forgot to change out with correct part?

How long had it been in there?
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  #3  
Old 05-28-2018, 04:40 PM
Lars Lars is offline
 
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Default

Quote:
Originally Posted by Mike S View Post
Creative?

Innovative?

Field repair that they just forgot to change out with correct part?

How long had it been in there?
I suppose it could’ve been a field repair. It looked like it had been there for awhile. Who ever made it put in some effort.
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  #4  
Old 05-29-2018, 12:05 AM
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az_gila az_gila is offline
 
Join Date: Jan 2005
Location: 57AZ - NW Tucson area
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Exclamation Getting obsolete

I bet a quickie, at-home fix after he discovered that Home Depot and Ace no longer stock the ANL current limiters.

They seem to have become a mail order only item, different from a decade ago and earlier when a lot of the flying RVs were built. At that time Home Depot had many sizes in stock.

In Tucson recently I could only find 100A ones and that was in an auto custom sound shop.

Maybe it's time for us to standardize on a more up-to-date high current fuse?
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  #5  
Old 05-29-2018, 12:15 PM
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RV7A Flyer RV7A Flyer is offline
 
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Default

I think I might expect the rivets to blow before the fuse did .

Shees.
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