Homemade helicopter, gyrocopter and aircraftsa
Saturday, October 19, 2019
Homemade tracked car
https://www.google.com/url?q=https://m.youtube.com/watch%3Fv%3Do2Ku5kpykdk&sa=U&ved=2ahUKEwill7zpwKjlAhXyQkEAHbSDAtsQtwIwB3oECAkQAQ&usg=AOvVaw25nzx6LmaTdjmKOrRUSslc
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