by Pixopaxo
This is a small A4 rocketmodel for a 18mm motor, a C6 should work depending on the weight you get. It will need aprox 35g of weight in the nose cone to fly stable.
It has an integrated baffle system to protect the chute and also two points for connecting the cords.
The walls are 0.8mm so you can print it with a 0.4mm nozzle with 2 walls.
Diameter is 60mm, Length 420 mm
Print the back part upside down with a brim.