I've seen this discussed on a particular thread, but I cannot relocate it.

Could someone please explain the "glide ratio" to me?

Also, would anyone know what the "glide ratio" would be for a Lockheed L-10A (the first a/c used by Air Canada)?

Thanking you in advance!

Glide ratio is forward distance travelled divided by altitude lost. When all your engines fail, you want to maximize your glide ratio. Most light aircraft have a published best glide ratio at a specific best glide speed.

Thanks so much "dangerous."

It's not all that common to see glide ratio numbers for twin engined aircraft published but someone on here might know. A total guess for an aircraft like the Electra would be around 12:1 with the engines not running and the propellers "feathered" (the position that creates the least drag). For some perspective a Pilatus PC-12 does 16:1 at max. weight, according to google a Northern Flying Squirrel does 1.98:1, and an open class glider like this 'eta' can do around 70:1.