Pull String Helicopter

UPDATED: v2 - complete rework. Different starter and propeller design

UPDATED: v1.1 with open string hole - for more accessible string change and eliminating the need of the fifth threaded insert.

This toys is designed to be more durable than the usual $1-2 toys you can find everywhere, therefore 608 bearing and threaded inserts are needed.

There are also 3 different sizes of propellers (S, M, L)

Parts needed for assembly:

• 1pcs 608 bearing
• 5pcs threaded inserts M3x5mm
• 4pcs M3 screws
• 1pcs rubber band (I recommend 5mm wide thicker band with around 5-6cm in diameter)
• 30-40cm string

Well, what more can I say… Just assemble it as seen in the pictures and have fun with it!

All parts are designed to be printed without supports.

I printed mine in PLA+ and 0.2mm layers.

As a bonus I included also the first version that is beefier than the final product (see the print file description.