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Pastimes : Techride -- Ignore unavailable to you. Want to Upgrade?

To: Peach who wrote (6580)	12/19/1999 2:50:00 PM
From: Blue Snowshoe	Respond to of 7442

Peach, You got me with that question. We are about to get snowed on. MRS. BLUE, the Yellow Dogs and I went for a long walk in the snow up the mountain. When we got on top we could see snow clouds coming over the divide. The weather changes here very quickly so we stayed on top for as long as possible and wasted no time coming down. What a nice hike. Now DD and football (Go Broncos) and then the STS-103 launch. What a great day. Her is a link you may enjoy j-2.com May the sun shine, 909. 909S2U,BLUE

To: Peach who wrote (6580)	12/19/1999 2:52:00 PM
From: Blue Snowshoe	Read Replies (1) \| Respond to of 7442

edit: ditto post

To: Peach who wrote (6580)	12/19/1999 6:12:00 PM
From: Jacques Chitte	Read Replies (1) \| Respond to of 7442

Ooh! OOooh! I know this one! When the shuttle engines kick in, they are LOUD. Loud enough to send 185 and more decibels shivering through the external tank's structure. That's enough vibration to break things. So they have this really big tank of water by the launch pad, and right when they're ready to light the candle they make a big waterfall in the jet deflection pit. This absorbs a lot of the acoustic energy from five roaring rocket exhausts and protects the ship from shaking itself apart. They did this for the saturn V also. If you look at those marvelous archive videos of five F-1s doing their bad thang, there is all this water rushing into the blast pit. One function is to keep 7.5 million pounds of thrust from doing a cutting torch number on the concrete. But absorbing engine noise before it could shake the stack to bits was the bigger reason.