Sunday, December 21, 2014

F-4 Wing Tuft Tests

ECN-29784ECN-29797 I found these NASA photos many years ago and kept them, as they reminded me of the tuft tests I did in the early 1960’s while in my first stint in Flight Test.

When the company didn’t want to go to the expense and time to build a model and conduct a wind tunnel series of tests, we painted the wings white, attached tufts with “500” mph industrial duct tape and flew the aircraft. The chase plane would take photos or we would mount cameras on the moldline for photos. If I remember correctly, my tests were on F-4A #9.

On the photos above, notice the straight flow over the wings except for the outer wing panel.

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