SR-71's

I never figured the SR-71 could do such a maneuver like this.

Col. Richard H. Graham, who commanded the U.S. Air Force 9th Strategic Reconnaissance Wing and has written a history of the SR-71 titled SR-71 Revealed, recently explained the dipsy doodle to PM. The pilot begins by climbing to about 30,000 ft. with the afterburners glowing. At about 33,000 ft., with the plane at Mach .95, he noses the aircraft over. Heading down at a pitch as great as 30 degrees, the plane falls as fast as 3000 ft. per minute. After 10 to 20 seconds, the pilot pulls out of the dive, then accelerates skyward at more than twice the speed of sound.
popularmechanics.com...

Ooops...I meant for the thread title to say SR-71's Dipsy Doodle maneuver.