Hot Air Balloon with Filament Ropes

Design & Structure

This 3D print replicates the structure of a hot air balloon, where the balloon, connecting ring, and basket are separate components that are later connected using 1.75mm filament strands as ropes. This method provides a realistic and lightweight design while ensuring stability and flexibility.

The balloon itself features a detailed shape with a smooth, rounded surface, while the basket is small and structured to mimic the appearance of a real hot air balloon gondola. The connecting ring serves as a central hub to attach the filament ropes, maintaining a well-balanced and aesthetic look.

Printing Considerations

• Minimal Supports Required: Only the first half of the balloon requires support to ensure a clean print. The rest of the design is optimized to print without additional support structures.
• Precise Hole Alignment: Each component includes pre-designed holes to accommodate the 1.75mm filament ropes, making assembly straightforward.
• Compatible with Various Materials: The main body can be printed in PLA, PETG, or ABS, while the filament ropes can remain standard PLA or PETG for easy handling.

Assembly Instructions

To complete the hot air balloon, you will need several filament strands:

• 1x 85 cm (main perimeter support around the balloon)
• 8x 40 cm (vertical ropes connecting the balloon to the ring)
• 4x 10 cm (short ropes attaching the basket to the ring)

Step-by-Step Guide:

1. Check Fitment: Before assembly, test the hole sizes with a piece of filament to ensure smooth insertion.
2. Prepare the Filament Strands: Cut the required lengths as precisely as possible and ensure they are straight. Using bent or curled filament may lead to difficulties in assembly.
3. Attach the Main Support (85 cm): Thread this filament around the lower part of the balloon, ensuring it sits securely in place.
4. Insert the Vertical Ropes (8x 40 cm): These should be threaded from the top of the balloon down to the connecting ring.
5. Secure with Glue: Fix the ring connections using super glue to prevent movement. This step may be tricky, so take your time.
6. Straighten the Filament (if needed): If the ropes appear twisted, carefully apply heat using a heat gun or a crème brûlée torch to soften and adjust them into position.
7. Attach the Basket (4x 10 cm): Finally, use short filament pieces to connect the basket to the ring, ensuring proper alignment.
8. Adjust Rope Lengths: If necessary, trim the filament strands to adjust the balloon’s overall height according to your preference.

Functional Features

• Hanging Loop Included: A small loop at the top allows easy suspension with a thread or wire, making it perfect for decorative purposes.
• Customizable Rope Lengths: The filament strands can be adjusted to alter the proportions of the balloon, allowing for different aesthetic variations.
• Durable & Lightweight: The structure remains sturdy yet lightweight, making it ideal for hanging without excessive load.

Usage & Applications

This 3D-printed hot air balloon is a versatile decoration piece for:

• Room & Ceiling Décor: Adds a floating aesthetic to living spaces, nurseries, or themed rooms.
• Creative Gifts: A unique handmade present for balloon enthusiasts and 3D-printing fans.
• Event & Party Decorations: Perfect for travel-themed parties, aviation events, or exhibitions.
• Educational Demonstrations: A great way to visualize aerostatics and the concept of hot air balloons.

This project combines 3D printing with creative assembly techniques, making it a fun and engaging model to print, build, and customize! 🚀🎈