// The Estes A8-3 and C6-7 motors have diameter of 17.7 mm,
// length 69.5 mm. The Estes Alpha launch pad has rod diameter 3.4 mm.
-motor_diam = 17.7 + 0.5; // add some tolerance
+motor_diam = 17.7 + 0.6; // add some tolerance
motor_len = 69.5 + 0.5;
segment_overlap = 15;