Right on the money, Sam! It is the stack flex cycle...(a fair bit of flex for a "ridged" object) -----Original Message----- From: az-observing-bounce@xxxxxxxxxxxxx [mailto:az-observing-bounce@xxxxxxxxxxxxx]On Behalf Of Sam&Anne Sent: Thursday, July 13, 2006 6:11 AM To: az-observing@xxxxxxxxxxxxx Subject: [AZ-Observing] Re: Not Really AZ or Observing: Space Shuttle Video Jimmy Ray wrote: > EXCELLENT!! I agree at it is amazing how much the shuttle lifts them > falls back toward the pad before SRB ignition! Wonder how that feels > from the flight deck? Since the SRBs are bolted to the pad until they ignite, it's not really lifting them - maybe that's not what you meant. The shuttle engine ignition rocks them forward; then they spring back. At that point, the SRBs fire, release, and they are able to rise. Cool video - thanks. Sam -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list. -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.394 / Virus Database: 268.9.10/386 - Release Date: 7/12/2006 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.394 / Virus Database: 268.9.10/386 - Release Date: 7/12/2006 -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.