Pro Series II Doorknob Advanced Rocket Kit (EST9720)

The Pro Series II Doorknob Advanced Rocket Kit is an extraordinary model that stands almost 27 inches tall. It is powered by D, E, and F engines, featuring a 1:5.3 scale representation of the Doorknob sounding rocket, once manufactured using Lacrosse rocket motors for the Hardtack Nuclear Test Series.

This rocket kit offers a fascinating historical overview, as it pays homage to the Hardtack Nuclear Testing Program conducted in the Pacific Proving Grounds during the late 1950s. It was during this period that scientists aimed to gather crucial data on the effects of nuclear testing on the upper atmosphere, particularly concerning radioactive fallout and its impact on the ozone layer.

The Doorknob rockets were designed to reach altitudes of approximately 50 miles, launching instrument-laden sounding rockets to collect valuable scientific data. The Estes 1:5.3 scale model is not only impressive in its size but also simple to construct and enjoyable to fly. It caters to both sport and scale rocket enthusiasts, and includes two sets of decals for customization options.