After me and a friend of mine had fixed my grill today I noticed a plane WAY up high, like far beyond 30,000 feet and this thing was moving FAST. I went on my flight app and it showed nothing so it must have been military. This was in central MA.
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Interesting, co-worker and I observed the same thing on the west coast yesterday. The plane was well above 30-35k feet of a commercial flight at 2x the speed of the passenger flight. We talked and guessing the passenger flight travelling at approximately 500 knots with a twin contrail, then this other plane was traveling somewhere near 1000 knots and above 40- 50k feet. The fast mover had a single contrail.
Yes! This had a single contrail as well.
-SB