20ft? Wimp... I did an Aerospace Engineering Course a couple years ago and we had to build rockets with an Egg Payload and successfully retrieve the Egg intact. Our Rocket went up about 337ft but this dumbass on our team packed the Parachute too tight so the Rocket hit the Apogee and then embedded itself about 9 1/2" in the ground. Needless to say, you could drink the Payload.