This was my entry into our low-power club's egg loft duration competition.  The rules stipulated a D-powered rocket that did not use parachute recovery (any other method was fine, including streamers, gliders, helicopters,etc)

My entry ascended briskly and smoothly, carrying a large egg.  At ejection, the spinner and stabilizer units separated, as permitted by the rules.  The spinner section entered a nice flat spin similar to that of a falling maple seed.  The descent was nice and slow.  The spinner section appeared to float in place for a long period of time.  The total flight duration was approximately 30 seconds, and the egg survived intact.

This flight was a real crowd pleaser.  It was also the winning entry by about 15 seconds.