How Fast Is Bellows Puff?

A blacksmith's bellows pumps air at about 8 m/s into the forge — enough to keep coal burning above 1,000°C, the temperature needed to forge iron. The bellows is one of the oldest mechanical devices known to humanity.

Bellows are one of the oldest mechanical devices known — used in metallurgy for at least 4,000 years.

• Same speed as a garden hose jet
• Needed to keep forges above 1,000°C