Can I run electrical instruments off the main battery in a self-launch Silent?
The self-launch Silent Club, Silent 2, and Silent 2 TARGA each have an engine battery (8Ah) that is charged via a flywheel generator when the engine is running. We do not recommend running instruments or avionics that draw much current from the engine battery (basic variometers are usually ok). Instead, we recommend the auxiliary battery tray option for electrical instruments, radio, GPS, Palm, transponder, etc. This way the engine battery will always be fully charged in case the engine needs to be re-started in flight.