An acquaintance of mine who retired from the RAAF some time ago once told me that the L/D ratio (glide angle) of the Mirage was 1 in 6 at 300kts!
Compares very favourably to the old Edmund Schneider designed Mk IV Kookaburra two seater glider with full dive brake!
And I did my first gliding solo in the above mentioned glider!