Successful flight of a 3 burn by 2 stage Dexter Labs (email@example.com) micro-hybrid. In this flight a modified WhipperSnapper rocket is boosted with an Estes D12-0 motor. At burnout the booster ignites a modified Estes C6-0 motor contained in the combustion chamber of the micro-hybrid by direct staging. The C6-0 fuel burns supplying "cruising thrust" through the micro-hybrid's graphite nozzle. When the C6-0 grain burns out the pre-heater grain is ignited again by direct staging. The pre-heater grain ignites the micro-hybrid which burns the paper case of the now-spent Estes motor. In all there are three separate burns contained in two physical stages. See publications available at www.micronitrorocketry.com for more details.