The Vipukirves Axe by Heikki Karna Requires Less Force to Split Wood

By: Meghan Young - Apr 24, 2014
References: vipukirves.fi & ohgizmo
For those who thought the hatchet was one tool that didn't require a remodelling, the Vipukirves Axe proves them wrong. It has replaced the conventional straight edge with a curved one, showing that sometimes the most direct route is not necessarily the better one. The Vipukirves Axe resembles a rigid robot claw and does as much damage as one depicted in a sci-fi flick would do.

Invented by Heikki Karna, who is based in Sipoo, Finland, the Vipukirves Axe splits wood more easily by offsetting the center of mass to the side, generating some rotational torque. Oh Gizmo writes, "This torque, applied to the part of the axe that’s already in the wood, acts as a lever and splits the wood down its fibre, reducing the amount of force needed to accomplish the same results."