'It was used in the 1780s, long before the airplane; Gleb Kotelnikov first put one in a knapsack in 1911'
a parachute
INVENTORS & INVENTIONS: It was used in the 1780s, long before the airplane; Gleb Kotelnikov first put one in a knapsack in 1911
It was used in the 1780s, long before the airplane; Gleb Kotelnikov first put one in a knapsack in 1911
It was used in the 1780s, long before the airplane; Gleb Kotelnikov first put one in a knapsack in 1911
INVENTORS & INVENTIONS
a parachute
INVENTORS & INVENTIONS