Luis; I had a similar problem on a Focker S11 ... the owner put in a USB power source plug with an LED that seems to have shorted. Result... not enough power to turn the prop. Took it off, powered the starter up with no problem.
Marc Baca On Thursday, August 29, 2024 at 10:57:36 AM PDT, Luis Claudio via KRnet <krnet@list.krnet.org> wrote: For the last three months ore so, I’ve been battling a battery drain that has kept me grounded. Being that my electronic ignitions require a healthy 12V to operate, any drain below that affects both ignition and my transponder. The xponder is critical cause I fly under Bravo airspace. To the problem: As I taxi my airplane I noticed a rapid battery voltage drain from a normal 12.5V to a no go condition of 11 - 10.5v. I would taxi back , recharge the battery, do a battery drain and charging system test and find no faults. I then decided that I may have too small a wire feeding my main buss. I changed all feed wires from 20 ga. to 14ga with the main being 12ga. I fired it up and no improvement. My last desperate act was to disconnect every wire from the buss and reconnect one at a time to see the effect. The last wire I reconnected was my avionics switch and bingo, it arced and I got the voltage drain This switch has a built in LED which may have shorted and caused a high impedance drain without tripping its breaker. I replaced all switches to regular toggle switches and everything is back to normal. I can now return to my flight testing and planning for the meet. Luis R Claudio N8981S Dallas, Tx. Sent from Yahoo Mail for iPhone -- KRnet mailing list KRnet@list.krnet.org https://list.krnet.org/mailman/listinfo/krnet -- KRnet mailing list KRnet@list.krnet.org https://list.krnet.org/mailman/listinfo/krnet
