LEGO 1972 Go Kart

After a licensing dispute with the Samsonite Corporation, LEGO USA was founded in Brookfield, Connecticut. Samsonite ended production of LEGO products in the US, but continued production in Canada.
The first boat hull, wing, propeller and helicopter rotor parts were introduced.
The LEGO® Technic 1x6x1 arc and the 1x6x2 arc were introduced.