This repository contains a set of custom FreeCAD-designed utilities to assist in building and finishing the Madcow 3" Fiberglass Scooter high-power rocket kit.
- Front and rear utility rings to assist during the epoxy phase.
- Although the original build guide recommends epoxying both centering rings to the motor tube, this limits access for fin bonding.
- Recommended process:
- Epoxy only the front centering ring to the motor tube.
- Insert the motor tube into the body tube with fins.
- Use the two green utility rings to align and press the fins flush against the airframe.
- Apply epoxy fillets to the fins from the inside (rear).
- The final green piece is a stand to support your rocket during painting.
- Only part intended to remain on the rocket during flight.
- Designed to mount standard rail buttons using M3 x 16mm machine screws (avoid wood screws).
- When finalizing your fin epoxy work, insert the rear rail button ring ahead of the rear centering ring — it should align perfectly with your fins.
- Snap-in stands to support your fully assembled rocket in a vertical position for storage or display.
- Designed in FreeCAD v1.0+
- Sizing and geometry are specific to the Madcow 3" fiberglass airframe and standard motor tube/fin layout.
MIT License — use, modify, and share freely.