Figuring out the mystery of what happened 2.1 seconds after launch. The motor is a Cesaroni Aerospace K454 from Canada, with 139 lbs. of peak thrust. I ran a pre-flight RockSim flight simulation that shows it pulling 20 g's as it leaps from 0 to 946 MPH in 3 seconds. Fiberglass and aluminum nose cone. HD 808 key fob camera in custom 3D-printed holder, which lost the camera on the supersonic climb. The Planet Labs payload (a vintage sticker of theirs) is a tribute to this Black Rock Desert launch location where we first met (and then I led their first two investment rounds, back when they were in a garage and before they had incorporated). More photos and post-mortem (now rebuilt to fly again!): https://www.flickr.com/photos/jurvets...