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Hi gang,
Well, being a future air racer, I thought I would be a good
experimenter and find out how the airflow acted over the top of my wing at
different airspeeds. I dutifully tufted a section of the top left wing with
cotton tufts and launched with a video camera.
Boy, was I disappointed! I thought I would see some detached
flow as airspeed increased. I went up to 260 mph indicated and *nothing.* The
flow never become detached along the length of the tufts chordwise. So much for
placing turbulator tape for some extra speed, huh?
Well, I might be missing something, so I thought I would
include a photo and see if you guys had any input. I plan on doing it again with
tufting near the wing root and maybe another section at the tip.
Just FYI, I had to slow to about 100 mph, bank over and
approach an accelerated stall to see any effect on the tufts... Only the last
two rows showed any disturbed airflow. Even at 100 mph indicated and full flaps,
all of the tufts were smooth and undisturbed.
Scotty G
Dago Red Unlimited Air Race Team
Unleashed
Sport Class Air Race Team
WarbirdAeroPress.com
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tufts.jpg
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