B Payload Altitude
Overview of Rules:
The goal of B Payload Altitude is to fly a NAR standard payload as high as possible.
NAR Standard Payloads are made from 'standard' 18mm body tube, so your design must be slightly larger than that. Many manufacturers carry tubes & nosecones for this event. See the advanced tips for more design considerations.
Tips for Beginners:
Buy a kit and build it straight, paint and sand it smooth. Calculate the optimum mass and then go fly it to test it out.
The link to the rules is located at http://nar.org/pinkbook/25_PAY.html
Links to Companies which sell kits: