Knex Helicopter By knexwackyrat in LivingLEGO & K'NEX2,39313Save PDFFavoriteIntroduction: Knex HelicopterBy knexwackyratFollow More by the author: About: hi More About knexwackyrat »will post a video soon :)Step 1: Knex HelicopterStep 2: Step 3: Step 4: Step 5: