|The Fat-Ass-Tron Sprint:
The F-A-T Sprint is a combination of the Estes Fat Boy, and the Astron Sprint. It was originally created to address one of the Fat Boy's inherent design flaws, that being it's inability to contain a 38/720 motor casing. While flying the Fat Boy on 'I' motors is somewhat entertaining, shoving that NC-80B into and possibly beyond the transonic range requires just a little more effort. The extra 2" of length from the F-A-T Sprint's boat-tail is enough (along with all that wasted space in the nose cone) to contain a J-350, and it also provides a subtle improvement (along with the sleek and stylish elliptical fins) to the already outstanding aerodynamic qualities of the original Fat Boy.
While pondering just where the hell the CP of this vehicle might be, it was determined that it might be prudent to research the location with a lower powered model. While it would be simple to incorporate the fins and boat-tail into a stock Fat Boy kit, the version illustrated here is slightly more ambitious, intended for 29mm single use motors.