| Re: [GMCnet] This thing was near my house today [message #319493 is a reply to message #319491] |
Fri, 23 June 2017 08:07   |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
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Ken Burton wrote on Fri, 23 June 2017 08:46Ken Henderson wrote on Thu, 22 June 2017 20:12Tracking the winds aloft associated with the big storm in the S., huh?
Ken H.
I did some more checking and they periodically launch these. This one had two transmitters and two call signs on it. One belongs to the Adler Planetarium and the other belongs to a PhD at the University of Chicago. They launch these things and at about 70,000 feet or so explode the balloon so it comes down again. Then they run out and retrieve it. Had I noticed it sooner, I would have run over to the landing / recovery site to find out what they are doing. I sent a note to the Phd. at the University of Chicago with a bunch of questions.
Winds aloft all right. That is a heck of a lot higher than either I have ever been.
I wonder if an SR-71 can go that high.
Ken,
We weren't supposed to know this, but SR-71s could cruise at 90. That is why the crew wore space suits.
Concords transatlantic cruise altitude was about 60K. In US control, they had to come down to 43 because that is the limit of survivability on pure O2 in the case of lost cabin pressure.
During a "Cadet Familiarization" ride (Read the kid gets to ride in the back while they try to scare the stuff out of him), we got an aged out F4 up to 70K, there was this minor problem. There is no air for the engines (110% spool speed a Zip for EPR (thust) and control surfaces to grab on to. That was 40+ years ago and I have no idea what they are doing now.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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