---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Wed 08/18/21: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 11:33 AM - Re: Blowing fuses on B&C BC433 alternator (Sam Hoskins) 2. 01:47 PM - Re: Video editing software (InkrGod) ________________________________ Message 1 _____________________________________ Time: 11:33:46 AM PST US From: Sam Hoskins Subject: Re: AeroElectric-List: Blowing fuses on B&C BC433 alternator Thanks for replying. When I get back from the airport I'll try and send a photo of the fuse in question. I was able to download the engine data from my Dynon D-180 and see that sometimes I do hit 30 amps draw. Assuming each leg would only be producing 10 amps, I would think that the fuse was a long way from it's design failure. I am talking to B&C about this, perhaps the fues don't need to be there at all. Sam On Tue, Aug 17, 2021 at 10:26 AM Robert L. Nuckolls, III < nuckolls.bob@aeroelectric.com> wrote: > About 50 flight hours ago, one of the fuses blew. Really blew, it > partially melted > the plastic coating. I couldn't really find anything wrong, but I thought > possibly > there was a short from one of the butt connectors to the firewall, nothing > definitive though. Last week, 50 flight hours later, another fuse blew. > I don't know if it was on the same leg as I didn't record it the first time > it happened. All the wiring from the alternator to the VR seems to be 100%. > I put my VOM on the leads and they all checked out per the B&C service > manual. https://bandc.com/wp-content/uploads/2018/05/pmr3a-trouble.pdf > > It would be interesting to see the carcasses of > the blown fuses. A design goal for fuses is to > provide a benign mitigation to an overloaded > wire. They are electrical 'weak links' in the > energy conduction chain. Fuse (and breaker) > manufacturers design and test their products > striving to bring a potentially catastrophic > failure to a ho-hum conclusion. > > If a blown fuse presents with a compromised > enclosure then it seems likely that some condition > other than fault current is in operation. Especially > when two such events are widely spaced in time. > > Electrical connections inside holders for > these fuses are close cousins to the fast-on > style terminals. They depend on very high > pressure mating to achieve gas-tight integrity > at the interface between blade and terminal. > > As we've seen and studied on switch failures, > loss of gas-tightness, over TIME, can produce > electrically induced heating at the joint that > contributes to a slow but ever increasing > degradation that ends in rather spectacular > failure of the whole assembly. > > This may well be what we're seeing here. > The fuse didn't simply open up in response > to some over-current, rather it may have > failed in response to a precipitous heating > event at the blade-to-terminal interface. > > Suggest you replace all three fuse holders > and see how it goes. > > > Bob . . . > > Un impeachable logic: George Carlin asked, "If black boxes > survive crashes, why don't they make the whole airplane > out of that stuff?" > ________________________________ Message 2 _____________________________________ Time: 01:47:18 PM PST US Subject: AeroElectric-List: Re: Video editing software From: "InkrGod" Movavi is similar to it and quite good. I am personally using for a long time nuckolls.bob(at)aeroelect wrote: > To: aeroelectric-list@matronics.com > From: "Robert L. Nuckolls, III" > Subject: Re: OT: any PhotoShop gurus out there...now video editing software. > Cc: > > At 03:41 AM 4/26/2020, you wrote: > > > Cant help on the Photoshop but this is distantly related I guess! > > > > Any recommendations on relatively simple video editing software at a fair price? > > > > I have used Pinnacle Studio for many years but find it clunky and heavy on resources. > > I'd been using MovieMaker for years but when > I updated my computer my old version of MM > wouldn't run under Win10. There are several > offerings on the 'net which install for free > but want some $ to get a full featured version. > > I found a 2016 edition that does run under > Win10. It's intuitive and compact. You won't > win any Oscars for editing with this package > but it has served me well for a long time. > It's no longer offered by Windows. > > You're welcome to try it > > https://tinyurl.com/y9r4zv4w > > > > Bob . . . 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