Inspired by the success of the low-wing two-engine DH.104 "Dove", a larger four-engine machine, called "Heron", was developed with greater wing span and extended body. Unfortunately, it came

to be fitted with heavy weak Gipsy engines of 250 hp each, and

could therefore not meet the intended specifications.

Several versions were built and later Gipsys became more powerful. In many cases, like the machine here, it was equipped with Lycoming

boxer motors type IO-540 of 290 hp each.

Usually with space for 14, or in some cases, 17 passengers. Several more luxurious variants have existed. Has been used both as civilian and military in many countries.
 

The first machines from the serial production went to New Zealand. Later, three machines in slightly different variants were delivered to Queen's Flight (RAF). For de Havilland, however, the aircraft type, unlike engined its pre decessor, the twin Dove, it became a loss business.

The machine in the hangar is the last flying Heron. Most recently used in the United States as one of the game syndicate's VIP flights between Los Angeles and Las Vegas.