Beginners should probably watch this video. This is a very, very common problem that occurs after a very light crash, then the helicopter requires a lot of throttle or collective to lift off. Reason: Main shaft is able to slide up and down. Fix: remove the slack between main gear and main shaft by pushing the main gear up. Hope this repair tip helps!
• Review:
• Metal head upgrades:
• Red canopy and rotor blades: