The hatch was recovered, but the rocket was lost ... and the refinements also led to reducing the number of fins from four to three. The fins for Cortex 2 are also reinforced with carbon fiber ...

Fins help with the stability of your rocket, so experiment to see which ... Cut about 11.8 inches (30 centimeters) of the ...

and adjusts balsa fins (via 4 micro servos) to correct the rocket’s flight path. Due to the nature of model rocketry, the active guidance is limited to the 3 seconds that the rocket is traveling ...