I have a small query here on the three different movements that I perceived after looking at videos during take off of Challenger (1986), Columbia (2003) and Atlantis (2010).
Challenger (1986): Immediately after lift off, the shuttle moves sideways to the left. There is no rotation (instantaneous direction being the axis) seen although it may not have been captured in this video.
Columbia (2003): Immediatly after lift off, it goes straight, rotates by 90 degrees (clockwise from bottom), gets fixed in that position, and goes up.
Atlantis (2010): i). First of all, after 1 was heard, the lift off occured some 23 seconds later. Until the 22nd second, there was lot of white smoke unlike in other two cases. Why was there a delay of 23 seconds? ii). Secondly, in this case, the shuttle rotates continuously about its axis as it goes up. It becomes stable only after some time.
My question is why the movement is different (if not vastly) or is it only a camera effect?