How Long Does LEGO® Twin-rotor Helicopter (42020) Take to Build?

A typical builder finishes LEGO® Twin-rotor Helicopter (set 42020, 145 pieces) in about 30 minutes. Taking it slowly runs closer to 40 minutes; building at a fast pace, about 20 minutes.

PieceTick estimates build time from piece count, part complexity, the set’s age rating, your experience level, and how you sort pieces. Adjust those on this page for an estimate matched to how you build.