Balloon powered car is a toy which use compressed air to generate movement. This adapter is compatible with LEGO® bricks and LEGO alternatives. Presented STL is a 3rd version: compromise between print time, strength and easy of printing. Shape and diameter of exhaust is very important, this 10mm give maximum speed and ride time.

Keep the balloon neck as short as possible to have better stability. Blow through exhaust to inflate balloon and store energy as compressed air. Test with a different car long and weight for the best speed.

Have fun!