Originally Posted by E. D. Eliot
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.
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."
I know that there are dual landing lights installed but who are you going to trust on this?