Our second favourite rocket after Fat Daddy, Big Bertha launches nice and slow and comes doen gentle (not on a standard Estes 'parachute', we upgraded), we even had a landing back on it's fins! Fins a bit vunerable to damage if parachute does't deploy as they 'stick out' from the main tube for quite a way.
Another classic Estes design. A great flier when built stock, the larger diameter body keeps it low and slow for park flying. For those altitude fiends lucky enough to know what a Pitfield motor is, see my conversion article: http://www.nsrg.org.uk/projects/begbirtha/ ;-)