MkI Viper Aug 1, 2024 Launch

This month marked the third launch of the MkI Viper. The liftoff mass was ~ 1.4 kg which includes a propellant mass of ~ 94 gm. Ignition occurred in less than one second. I had active control using a transmitter and receiver. The Viper yawed to port and pitched up (as opposed to pitching down on the last launch) as it cleared the rail guide. On comparing the two launches, it is clear that the center-of-mass was below the thrust vector (pitch down) on the last launch and above (pitch up) the thrust vector on this launch. I feel I'm getting a handle on CM calculations with predictable results.