After extensive review of both the NASA and SpaceX video feeds this is an
approximate timeline of events starting at the event.
T-0 Vapor emerges from two locations at top of 2nd stage. Vapor is
ejecting under high pressure. Assumption that vapor is LOX venting.
T+1.8 Fireball appears in vapor cloud. Indicating RP-1 is being vented
simultaneously with LOX.
T+4.51 Fireball extinguished. Vapor still venting at reduced flow rate.
1st stage continues thrusting.
T+7.28 Second fireball at 2nd stage level of vehicle. Symmetrical shape
of fireball and resulting vapor cloud indicate probable collapse of 2nd
stage tanks due to aerodynamic pressure load.
T+7.98 Reduction in 1st stage engines exhaust indicating 1st stage shut
down in progress.
T+8.01 1st stage disappears into vapor cloud. Engines appear to be shut
down, no visible exhaust flame.
T+8.35 Third fireball in vapor cloud. Increase in vapor cloud size.
Probable 1st stage breakup.
T+10.26 Object appears from behind vapor cloud trailing two fluttering
objects. The same object is visible in both the NASA and SpaceX video feeds.
Object is also venting vapor. High probability object is Dragon capsule,
whole or part, trailing collapsed drogue chutes. Object is visible for
approximately 3 seconds in both video feeds. The object goes off frame in the
NASA feed. The SpaceX feed appears to transition to a different camera. SpaceX
did receive data from Dragon after the launch vehicle failure.
An 8 second event should produce significant data!
Krell
