Abstract: Systems, devices and methods for model rocketry are provided. According to some aspects, new forms of model rocket nose cones, other model rocket components, and methods for their use, are provided. A new form of reversibly-divisible nose cone is provided, including a plurality of housing sections forming an interior payload section and, in some embodiments, including a locking mechanism(s) configured to hold the plurality of housing sections together during the initial phases of flight. In some embodiments, such a locking mechanism is unlocked, and the housing sections are separated, at least in part, in an ejection phase of model rocket flight. In some embodiments, such a locking mechanism is unlocked, at least in part, by increased air resistance and tension from shock cord(s) of a model rocket. Shock cord mounting arms are provided, including eyelet(s), mounted at an angle to a trailing surface of the nose cone.