VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics


Go Back   VAF Forums > Model Specific > RV-12
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 07-25-2018, 01:18 PM
E. D. Eliot E. D. Eliot is offline
 
Join Date: Dec 2005
Location: San Pedro
Posts: 886
Default Wanted - your experience - electrical load

I know exactly what Van's says to/not to do reference overloading the power generated by the 912ULS alternator. And have read a few threads by RV-12 builders who have installed a second landing light / EFIS, etc.

And +++

I would like to hear from builders who have installed a second EFIS and/or a second landing light into their RV-12. I understand that my aircraft is ELSA and that a second landing light is discouraged by Van's and can't be installed until FAA sign off. Just like to hear from those who have had success or failure with a second landing light and/or EFIS.

If you have done these installs and found that they really cause problems to the electrical system of the 12 or not, I appreciate your reply.
__________________
Building finally
Reply With Quote
  #2  
Old 07-25-2018, 02:02 PM
John-G John-G is offline
 
Join Date: Jan 2012
Location: Northeast Ohio
Posts: 523
Default

E. D. ---

I can't give you any info regarding a second EFIS because I installed inexpensive backup steam gauges ... but I did add a second landing light to have wig-wag to take advantage of that feature the AeroLED's light offers. I have the 912ULS and I too was concerned about the extra electrical load .... so I added a separate on/off switch for the left landing light's "steady on". When wig-wag is in use, there is no additional current draw than one would have with the right landing light steady on ... because one light is always off.

I don't fly at night but wanted the capability to turn on the left light on if I wanted to on short final so just added a panel switch to be able to do that.

I should think if you were to run the wires but not connect them until after your fly off, you could add the left light and a panel switch as I did so you don't have to worry on over taxing the electrical system. Below is a link covering the instillation of the switch.
http://www.dogaviation.com/2016/03/f...-switches.html

Happy building,
__________________
John
www.dogaviation.com
RV-12 Wings, Empennage, Fuselage, Finishing, Avionics and Powerplant kits all completed
Now Flying!!

Dues paid until September 2019
Reply With Quote
  #3  
Old 07-26-2018, 05:48 AM
Phantom30's Avatar
Phantom30 Phantom30 is offline
 
Join Date: Jul 2009
Location: Coeur d'Alene, ID/Casa Grande, AZ
Posts: 650
Default

Quote:
Originally Posted by E. D. Eliot View Post
I know exactly what Van's says to/not to do reference overloading the power generated by the 912ULS alternator. And have read a few threads by RV-12 builders who have installed a second landing light / EFIS, etc.

And +++

I would like to hear from builders who have installed a second EFIS and/or a second landing light into their RV-12. I understand that my aircraft is ELSA and that a second landing light is discouraged by Van's and can't be installed until FAA sign off. Just like to hear from those who have had success or failure with a second landing light and/or EFIS.

If you have done these installs and found that they really cause problems to the electrical system of the 12 or not, I appreciate your reply.
I have the dual Garmin G3X package and full lighting set up..No problems. Also have aux fuel tank w/transfer pump; and have not triggered any alarms when used (landing light not in use when transfer pump was running)..FYI
__________________
Ric Dickison
307 (CAB) Phantom
Search and Destroy (Can
Tho RVN)
Distinguished Flying Cross Society Member
CH-47 & UH-1H "Driver"
Rotax 9 Series Service IRMT

RV-12 Kit#729 "N312RD" is now a full functioning fun machine!! Thanks Van for fulfilling my dream😎
2018 Dues Paid
Reply With Quote
  #4  
Old 07-26-2018, 02:12 PM
RFSchaller RFSchaller is offline
 
Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 2,320
Default

I have the D180 &D100 combo. I added a second comm, ADS-B In/Out and a VOR/ILS 3LMB in addition to the standard XPDR and comm. With everything on I draw about 8.5 amps. Never have had any issues.
Reply With Quote
  #5  
Old 07-26-2018, 04:22 PM
Tony_T's Avatar
Tony_T Tony_T is offline
 
Join Date: Dec 2008
Location: Lacey, WA
Posts: 1,215
Default

Quote:
Originally Posted by E. D. Eliot View Post
I know exactly what Van's says to/not to do reference overloading the power generated by the 912ULS alternator. And have read a few threads by RV-12 builders who have installed a second landing light / EFIS, etc.

And +++

I would like to hear from builders who have installed a second EFIS and/or a second landing light into their RV-12. I understand that my aircraft is ELSA and that a second landing light is discouraged by Van's and can't be installed until FAA sign off. Just like to hear from those who have had success or failure with a second landing light and/or EFIS.

If you have done these installs and found that they really cause problems to the electrical system of the 12 or not, I appreciate your reply.
E.D., Van's specifically approves the installation of the second EFIS in Notification 14-10-15 provided that both screens are serial number 6000 or greater. The earlier screens drew more power than the later ones.

I have the dual screens and have had no problems. There is enough electrical capacity to keep the battery charged with everything on.

As for the dual landing lights for ULS airplanes, I don't see where Van's discourages it. It seems pretty black and white in the documentation:
"For RV-12iS aircraft equipped with the Rotax 912 iS Sport engine, we now have the option for a second landing light with wig wag synchronization. This kit, which is priced at $345, is available for retrofit or installation during initial construction. Please specify part number “RV-12 IS LEFT LL KIT” when ordering. Note that this kit is not available for 912 ULS-powered RV-12 airplanes, as the ULS engine’s integral alternator does not supply sufficient electrical capacity to drive the multiple landing lights." My emphasis.

I know that there are dual landing lights installed but who are you going to trust on this?
__________________
Tony
RV-12 #202 -- Flying
Reply With Quote
  #6  
Old 07-26-2018, 06:22 PM
EXflyer EXflyer is offline
 
Join Date: Jan 2016
Location: Chiloquin OR
Posts: 81
Default Power

Seems like way back part of figuring things out for an aircraft was before adding any thing more to the system one figured out total draw by adding up all the items that required power. Isnt that the way its done these days? And then figure out how much the alternator ( generator back then) put out.
Would think that would be easier than poke and hope method. Just my thoughts.
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 11:01 AM.


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.