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rotorwrench · 05-05-2023, 07:12 PM

Aircraft have a relay that closes the circuit to the battery. Some just used a very large manual contacter switch on the instrument panel but most use a relay now days.

Ford used foot and hand operated switches for a long time before they started using a starter relay mounted close to the battery. The starter switch button on the dash just grounds the relay to start.

05-05-2023, 07:12 PM	#23
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,522	Re: Battery Disconnect Switch Aircraft have a relay that closes the circuit to the battery. Some just used a very large manual contacter switch on the instrument panel but most use a relay now days. Ford used foot and hand operated switches for a long time before they started using a starter relay mounted close to the battery. The starter switch button on the dash just grounds the relay to start.