A 2.6 in rocket of Madcow Rocketry's parts: choose the motor, the nose cone, the nose
ballast and the fin span for a 3,048 m apogee, with margins over the ascent of at
least 1.5 calibres (flight), at most 4 (static) and 6 (flight), and at least 30 m/s off a 3 m rail
Not yet validated: see the Accuracy page before trusting these numbers.
motor    total impulse (N·s)   designs flown   nearest apogee within the limits
J450DM                1061.6               3   2648 m
J300LR                1212.8               6   none
J760                  1267.3              25   3057 m
K400C                 1307.3             307   3048 m
K940                  1636.1              19   3150 m
Found: the K400C with the PNC26K-W nose (3:1 ogive, plastic), 0.35 kg of ballast, fins 8.9 cm in span
(stopped: Target, after 360 flights)
Flown again: apogee 3048.0 m, top speed Mach 1.23, rail exit 33.8 m/s, liftoff mass 2.60 kg;
margins over the ascent: flight 3.04 to 4.83 calibres, static at most 3.88
Flown again, tolerances 100 times tighter: apogee 3048.0 m, rail exit 33.8 m/s
Both flights within 0.1 m of 3,048 m and within every limit: yes
