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  Topic: Surplus Wire
BMC_Dave

Replies: 8
Views: 5973

PostForum: AeroElectric-List   Posted: Thu Jun 18, 2020 7:03 am   Subject: Re: Surplus Wire
Yeah I got my zeros mixed up there. The shield is equivalent to a single 24ga wire, so that kills the idea. Thanks.
  Topic: Surplus Wire
BMC_Dave

Replies: 8
Views: 5973

PostForum: AeroElectric-List   Posted: Wed Jun 17, 2020 6:55 pm   Subject: Re: Surplus Wire
Looking at the BMS13-48 spec the flat shield is tin coated copper, 0.0015" +-.0004 thk and 0.020" wide. I counted 16 strands in the braid I disassembled.

So 0.02"x.0011"x16 is 0 ...
  Topic: Surplus Wire
BMC_Dave

Replies: 8
Views: 5973

PostForum: AeroElectric-List   Posted: Wed Jun 17, 2020 1:12 pm   Subject: Re: Surplus Wire
The shield is sized for the combined current of the wires right? I'd like to use it for the other current conductor if I can.
  Topic: Surplus Wire
BMC_Dave

Replies: 8
Views: 5973

PostForum: AeroElectric-List   Posted: Sat Jun 13, 2020 10:04 pm   Subject: Re: Surplus Wire
Unfortunately I won't be selling it.

I have harnesses for several things, so this will be at most two dozen circuits. Of which I can carry power and ground through one cable. So hey each one gets a ...
  Topic: Surplus Wire
BMC_Dave

Replies: 8
Views: 5973

PostForum: AeroElectric-List   Posted: Sat Jun 13, 2020 5:22 pm   Subject: Surplus Wire
I have a bunch of surplus BMS13-48 ETFE wire, 5 nickle-plated 24ga conductors, shielded.

Reading the AEC it seems an ok practice to bundle these conductors for larger currents, so I could use them ...
  Topic: Internally Regulated Over Voltage Protection
BMC_Dave

Replies: 5
Views: 5586

PostForum: AeroElectric-List   Posted: Wed Jan 16, 2019 9:50 am   Subject: Re: Internally Regulated Over Voltage Protection
Most of the battery charging current will come through the battery contactor.
Very little, if any will pass through the E-Bus diode. Another diode between
the battery and E-Bus is not desired becau ...
  Topic: Internally Regulated Over Voltage Protection
BMC_Dave

Replies: 5
Views: 5586

PostForum: AeroElectric-List   Posted: Tue Jan 15, 2019 3:10 pm   Subject: Re: Internally Regulated Over Voltage Protection
Bueller
  Topic: Internally Regulated Over Voltage Protection
BMC_Dave

Replies: 5
Views: 5586

PostForum: AeroElectric-List   Posted: Mon Jan 14, 2019 10:47 am   Subject: Re: Internally Regulated Over Voltage Protection
Adding to the questions, are there any negatives to leaving the e-bus alt feed closed for normal operations? Or would an additional diode between the e-bus alt feed and diode be prudent to avoid alter ...
  Topic: Internally Regulated Over Voltage Protection
BMC_Dave

Replies: 5
Views: 5586

PostForum: AeroElectric-List   Posted: Sun Jan 13, 2019 9:01 pm   Subject: Re: Internally Regulated Over Voltage Protection
After finding Z-24 I wonder if leaving the ebus alt feed closed normally would help with load dumps for in flight switching off of the alternator?

The easiest solution is to turn off the engine fir ...
  Topic: Internally Regulated Over Voltage Protection
BMC_Dave

Replies: 5
Views: 5586

PostForum: AeroElectric-List   Posted: Sun Jan 13, 2019 8:01 pm   Subject: Internally Regulated Over Voltage Protection
I see that schematics for providing over voltage regulation on internally regulated alternators have been scrubbed: http://www.aeroelectric.com/DIY/DIY_Crowbar_OVP_F.pdf

Looks like the last rev was ...
  Topic: Z-12 Aux Alt Question
BMC_Dave

Replies: 18
Views: 13672

PostForum: AeroElectric-List   Posted: Wed Jan 09, 2019 10:53 am   Subject: Re: Z-12 Aux Alt Question

'conventional' operation: airframe power is on one switch (the master),
and the engine on another. Sustained smoke in the cockpit in
'conventional' is master off NOW, & find the ground.
My ...
  Topic: Z-12 Aux Alt Question
BMC_Dave

Replies: 18
Views: 13672

PostForum: AeroElectric-List   Posted: Tue Jan 08, 2019 2:59 pm   Subject: Re: Z-12 Aux Alt Question
Yeah I'm still torn. Having a single bus leaves no ability to isolate components, but like was mentioned continued IFR flight requires almost everything on the e-bus anyway. A single bus also means my ...
  Topic: Z-12 Aux Alt Question
BMC_Dave

Replies: 18
Views: 13672

PostForum: AeroElectric-List   Posted: Tue Jan 08, 2019 10:51 am   Subject: Re: Z-12 Aux Alt Question
It is the choice of approach many of us struggle with (at least I do).

On one hand, there is the concept of a failed alternator triggering use of an endurance bus, so you don't have to choose what ...
  Topic: Z-12 Aux Alt Question
BMC_Dave

Replies: 18
Views: 13672

PostForum: AeroElectric-List   Posted: Tue Jan 08, 2019 9:35 am   Subject: Re: Z-12 Aux Alt Question
Looking at B&C's offerings it seems they have a standby alt that will make 41.3 amps at my IO-540s cruise RPM, I don't recall seeing these on their site in the recent past?

Anyway since it seem ...
  Topic: Z-12 Aux Alt Question
BMC_Dave

Replies: 18
Views: 13672

PostForum: AeroElectric-List   Posted: Tue Jan 08, 2019 8:05 am   Subject: Re: Z-12 Aux Alt Question
You may have already caught this, but the feed to the aux alternator field needs to come from the endurance bus, or the alternator won’t work while the main bus is turned off.

Jeff Page
Dream Ai ...
  Topic: Z-12 Aux Alt Question
BMC_Dave

Replies: 18
Views: 13672

PostForum: AeroElectric-List   Posted: Mon Jan 07, 2019 8:05 pm   Subject: Re: Z-12 Aux Alt Question
I agree it is a high continuous load, nevertheless that's what's required. Albeit with a little headroom on some things (lights, for example).

ETA: EFI is more like 16A max for all cases, so these ...
  Topic: Z-12 Aux Alt Question
BMC_Dave

Replies: 18
Views: 13672

PostForum: AeroElectric-List   Posted: Mon Jan 07, 2019 6:21 pm   Subject: Re: Z-12 Aux Alt Question
At 01:45 PM 1/7/2019, you wrote:

Why move it to the e-bus?

Primarily because the BC410-H standby alternator won't provide the 43.88 amps I need for IFR cruise for everything on the main bus. ...
  Topic: Z-12 Aux Alt Question
BMC_Dave

Replies: 18
Views: 13672

PostForum: AeroElectric-List   Posted: Mon Jan 07, 2019 11:45 am   Subject: Z-12 Aux Alt Question
Taking a chance and posting my in-work Z-12 power architecture.

I'm trying to decide what behavior I want from my aux alt. Whether I want it to remain automatic or be manually switched. Bob had pre ...
  Topic: PASS-THROUGH CHARGER
BMC_Dave

Replies: 37
Views: 24153

PostForum: AeroElectric-List   Posted: Wed Oct 03, 2018 5:00 pm   Subject: Re: PASS-THROUGH CHARGER
unless you have a touch screen and turn off the RPI via the touch screen, you need some kind of programmable power control. Just turning off the power to the unit risks corrupting the oper ...
  Topic: PASS-THROUGH CHARGER
BMC_Dave

Replies: 37
Views: 24153

PostForum: AeroElectric-List   Posted: Wed Oct 03, 2018 3:20 pm   Subject: Re: PASS-THROUGH CHARGER
Just going off people complaining about it interfering with their radios, figured I'd ask the guy who's actually using one in his airplane. Hopefully he'll chime in Smile
 
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