As they climbed, the tufts streamed straight back— attached flow . Then the pilot pulled the throttle and eased the stick back. Slower. Nose higher.
That weekend, his professor, Dr. Varma, took the aerodynamics club to a small airfield. Leo was allowed to ride in the back seat of an old two-seater propeller plane.
"Watch the tufts," the pilot said, pointing to small wool threads glued to the top of the wing.
For the rest of his career, he never called it "separation." He called it the sigh . And he always checked the tufts first.
"The boundary layer," Leo whispered, his voice swallowed by the wind. "It’s reversing."
As they climbed, the tufts streamed straight back— attached flow . Then the pilot pulled the throttle and eased the stick back. Slower. Nose higher.
That weekend, his professor, Dr. Varma, took the aerodynamics club to a small airfield. Leo was allowed to ride in the back seat of an old two-seater propeller plane.
"Watch the tufts," the pilot said, pointing to small wool threads glued to the top of the wing.
For the rest of his career, he never called it "separation." He called it the sigh . And he always checked the tufts first.
"The boundary layer," Leo whispered, his voice swallowed by the wind. "It’s reversing."