4.5 % at 4500 m15000 feet above sea level
A red engine travels in an incredibly red landscape high in the Andes.
About 4550 m / 15000 feet above sea level, and still climbing !
Do you feel the grade ?
Climbing the Andes, on the second highest line in the World (the highest one is in Tibet).
Thin air, heavy metal with grime, and snow.