Description

D9 Arrow is a slim 3D printed model rocket designed around D-class model rocket motors, with a focus on stable flight, clean aerodynamics and simple assembly.

The rocket has been designed and simulated in OpenRocket, with the current setup showing a stability margin of approximately 1.95 calibers and a simulated apogee of around 507 meters using a D9-7 motor.

The file also includes a simple launch stand base, designed for a 7 mm launch rod.

Dimensions / Specs

• Rocket length: 42.5 cm

• Max diameter: 2.4 cm

• Mass without motor: 81.3 g

• Mass with motor: 111,7 g

• Launch rod diameter: 7 mm

• Recommended motor class: D-class model rocket motor

OpenRocket Simulation

• Motor: D9-7

• Stability: 1.95 cal

• Simulated apogee: 507 m

• Max velocity: 127 m/s

• Max acceleration: 208 m/s²

Features

• screw on motor cap

• Rear fin section for stable flight

• Internal space for recovery system

• Designed for D-class model rocket motors

• Includes launch stand base

• Designed for a 7 mm launch rod

• Simulated in OpenRocket

Printing

4 perimeters
PETG
supports where needed
nose cone 80 % infil


Important Safety Note

This is an experimental hobby rocket design.
Before launching, always check your own print quality, final weight, CG/CP, motor fit, recovery system and local regulations.

Use only certified model rocket motors and launch in a safe open area with suitable weather conditions.

Feedback

Feedback, test results and improvement ideas are very welcome.
I may continue updating the design with improved motor retention, alternative fin options and recovery variations.