Rubberband-powered Helicopter

STEM Inventions
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556432

UPDATE: Watch the new video: youtu.be/DiJIvoHvGk4 Buy the Rubber Band Helicopter project kit here: https://amzn.to/2ROfNWs Buy propellers: http://amzn.to/2BuDiYN Be sure to check out https://www.madeforsteam.com/

Published by: STEM Inventions Published at: 12 years ago Category: آموزشی
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