The Heinkel HD 16 was a single-engine biplane torpedo aircraft developed by the German aviation company Ernst Heinkel Flugzeugwerke in the nineteen-twenties and produced under license by Svenska Aero in Stockholm, Sweden.

Two HD 16s were built and sold to the Swedish Navy and designated T 1.

The T 1 was equipped with two 14-cylinder Armstrong Siddeley Leopard radial engines with 666 Horsepower.

This torpedo was built in Sweden, had a caliber of 45 cm and weighed about 800 kg.

The cockpit was subsequently modified in tandem to allow a better view for the observer.