My highest groundspeed so far
 

way to squash my recent accomplishment! I hit 185kts in a 172 coming back from CA to FL at 9.5

210kts in a 66 Mooney M20E. (Usually 150 kts).

http://farm3.static.flickr.com/2330/...6b9_z.jpg?zz=1

Standing by for the military guys to post something really impressive :eek:

421kts in a King Air 300

115 IAS @ 70,000.

I believe the U-2 is about 104 IAS.

I'm impressed that you had taken a pic! In all the years working at the ATC in Oakland (well, Fremont actually), the highest I ever saw from airliners was about 635kts. Jetstream at about 150kts on the tail, at M.85 or so.

Fastest ever was about 1800kts, SR-71 routinely flying in and out of Beale AFB. I tried tracking a missile off Vandeberg AFB at about 3000kts, but obviously no transponder to lock a tag on.

For myself, flying in the little Barbie Jet, about the same, 630kts GS, 480-ish TAS somewhere in North America. There's no jet stream where I've been flying that last couple years.

I lost the pic but I have 722 kts straight and level .91. Got a few comments from ATC that day.

Whats a barbie jet

Sadly, in the days of GPS, it seems that such radio one-upsmanship is long since gone.