Rear Control Stick
This little stick that was behind the pilot would aid in banking the
airplane into the direction you wanted to go. To activate it you had
a small pocket sewn into the back of your leather jacket. And some
of the pilots even used a strap, a leather belt to go around their
waist to not only keep that pocket secure with the stick but also to
aid in moving it. So as you leaned in the seat from side to side,
you could bank the airplane. Lean to the left, you banked to the
left; lean to the right, and you would bank to the right.