VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.

  #11  
Old 12-06-2021, 07:45 PM
smithflys23 smithflys23 is offline
 
Join Date: Feb 2017
Location: Jupiter
Posts: 286
Default

What size wire is needed for the fault monitoring?
Ill be connecting it to a Skyview HDX.
Reply With Quote
  #12  
Old 12-06-2021, 08:20 PM
scrollF4's Avatar
scrollF4 scrollF4 is offline
Moderator, Asst. Line Boy
 
Join Date: Jan 2010
Location: Flower Mound, TX
Posts: 1,691
Default

Quote:
Originally Posted by Tankerpilot75 View Post
Sid,
My 60 amp alternator usually fully recharges my ETX900 after starting within a few minutes (based on observed amperage drop).
Roger that, Jim, that's not a problem. I meant two things:
- It'll take a little longer to recharge the 900 with a 60 amp alternator, but I should have pointed out it takes only a minute or two longer. This is my setup, but the way.
- EarthX is pretty adamant about using a battery properly rated for the alternator. A 680 is too small for a 70 amp alternator.

Sorry for not being more clear.

I have an ETX900 on KELLI GIRL...WOW what quick starts.
__________________
Scroll

Sid "Scroll" Mayeux, Col, USAF (ret)
52F NW Regional/Aero Valley Airport, Roanoke TX (home of DR's Van Cave)
"KELLI GIRL" N260KM RV-7A tipper

Exemption waived.
Proud and grateful 2022 -=VAF=- Contributor

PS: I am not an influencer. I have no influence. Just ask my kids.
Reply With Quote
  #13  
Old 12-07-2021, 12:25 AM
rv8ch's Avatar
rv8ch rv8ch is offline
 
Join Date: Feb 2005
Location: LSGY
Posts: 4,640
Default

Quote:
Originally Posted by smithflys23 View Post
What size wire is needed for the fault monitoring?
Ill be connecting it to a Skyview HDX.
Earthx says anything bigger than a AWG#20 will work. Not a lot of current there, just enough to light a LED on the panel or tickle your EFIS.

Click image for larger version

Name:	Fault-Monitoring-Circuit-24V-1.jpg
Views:	159
Size:	41.3 KB
ID:	19234
__________________
Mickey Coggins
Fresh Ukraine update from RV-6 owner Alex 6 May 2022!
http://www.rv8.ch/help-people-in-ukraine/
"Hello, world!"
Reply With Quote
  #14  
Old 12-07-2021, 05:19 AM
smithflys23 smithflys23 is offline
 
Join Date: Feb 2017
Location: Jupiter
Posts: 286
Default

Quote:
Originally Posted by rv8ch View Post
Earthx says anything bigger than a AWG#20 will work. Not a lot of current there, just enough to light a LED on the panel or tickle your EFIS.

Attachment 19234
Thank you!
Reply With Quote
  #15  
Old 12-07-2021, 06:20 AM
219PB 219PB is offline
 
Join Date: Aug 2014
Location: Victoria, Tx
Posts: 530
Default

The internals of the 680 and 680C are the same. The 680's case is a little larger so that it would be drop in replacement for the Odyssey 680 battery box. I installed dual 680Cs to take advantage of the smaller box. They turn over my 360 very well.

I have a 60 amp alternator on one of the batteries and a 30 amp on the other. It will take about 5 mins for the 30 amp alternator to charge the battery if I have had the avionics on doing updates, troubleshooting, etc. If not, I do not even notice a significant current draw, even after starting the engine.
__________________
Paul Bonorden
RV-6A Flying
My Builders Website
Victoria, TX
Reply With Quote
  #16  
Old 12-07-2021, 11:03 AM
smithflys23 smithflys23 is offline
 
Join Date: Feb 2017
Location: Jupiter
Posts: 286
Default

What is the consensus on using the vented, or standard EarthX battery on an RV8 with the rear mounted battery?
Reply With Quote
  #17  
Old 12-07-2021, 11:42 AM
David Paule David Paule is offline
 
Join Date: Dec 2009
Location: Boulder, CO
Posts: 5,264
Default

I think that it's a good idea to seal and vent any lithium battery whose fumes can get into the cockpit if it had a problem. I'm planning to put the 680C I'll be getting into the cowl cheek of my RV-3B project. I would not put a lithium battery on the engine side of the firewall.

I checked with EarthX back when I was planning a cockpit mount, and was given a max temperature for a runaway battery. Aluminum is sufficient for the case. You might check for yourself if that's a concern.

Dave
Reply With Quote
  #18  
Old 12-07-2021, 11:55 AM
airguy's Avatar
airguy airguy is offline
 
Join Date: Oct 2006
Location: Garden City, Tx
Posts: 5,816
Default

Quote:
Originally Posted by smithflys23 View Post
What is the consensus on using the vented, or standard EarthX battery on an RV8 with the rear mounted battery?
Depends entirely on your level of risk aversion. Thermal runaway can occur with a lithium battery if they are overcharged - so if you are absolutely 100% certain that you will notice and stop an overcharge event if your alternator regulator goes Tango Uniform, then you may choose to do without the vent.

I have a full glass panel with no less than 4 individual devices that will alarm on high or low voltage - so I'm relatively sure I'll notice it and correct it - and I still put my ETX900 (behind the baggage compartment) in a sealed case and vented it through the belly. YMMV.
__________________
Greg Niehues - SEL, IFR, Repairman Cert.
Garden City, TX VAF 2022 dues paid
N16GN flying 1,000 hrs and counting on 91E10; IO360, SDS, WWRV200, Dynon HDX, IFD440, G5
Built an off-plan RV9A with too much fuel and too much HP. Should drop dead any minute now.
Pending Repeat Offender - 10 kit is on order. TDI? Turbine? Stay tuned!
Reply With Quote
  #19  
Old 12-07-2021, 12:31 PM
rv6n6r's Avatar
rv6n6r rv6n6r is offline
 
Join Date: May 2007
Location: Gearhart Oregon
Posts: 486
Default

Quote:
Originally Posted by airguy View Post
I still put my ETX900 (behind the baggage compartment) in a sealed case and vented it through the belly. YMMV.
I've been wondering how people vent these. Can you describe it? Pictures?
__________________
Randall Henderson
RV-6 / O-360 / CS, 1600+ hrs, 1st flight Sept. 1999
Outstanding Workmanship OSH 2000, Craftsmanship award AWO 2000
Airport committee chair & AOPA ASNV for Seaside, OR Municipal (56S), www.seasideairport.org
Last Donated January 2022
Reply With Quote
  #20  
Old 12-07-2021, 01:20 PM
Avanza Avanza is offline
 
Join Date: Jul 2020
Location: Vastervik Sweden
Posts: 139
Default Battery compartmet

I replaced my Concord with a Lithium battery (LiFE PO4).
Itīs in the engine compartment. The new battery is smaller so I made an insulated box of glass fiber over it with a scat hose close to cylinder 3.
So the battery stays relatively cool.
I had a spare Lithium battery and one day a hangar friend put it on a diesel
generator. It worked fine for an hour or so and then it had a thermal run away.
It melted a bit in the corners and we had a lot of smoke in the hangar for about
20 min. Yes the battery was hot but there where no open flames.
This smoke is poisonous, I would definitely not put a Lithium battery aft of the firewall in an aircraft. If you have to, put it in a box vented to the outside.
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 02:09 PM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.