reply to post by OldSquid
I'm suspecting that what you saw was the SR-71 replacement -- a Mach 6 bird that is reported to leave donut style contrails. Sometimes identified
by code name Stovepipe. It begins descent to initial approach altitude while still 100 miles out. On another subject, I well remember the B-36.
Grew up in Fort Worth and the low pitched enormous burrrrrr I'll never forget. If the '36 was moving away from you the Dopler effect would make
the props sound more like a chorus of helicopters -- pat pat pat. Remember reading that a light weight 36 achieved 50,000 ft. It's amazing that
the pressure shell was designed for that much differential.


