H-maskinen was an aircraft designed and build by Orlogsværftet (Naval Dockyards) in Copenhagen. The first flight was in 1917 and it was in service from 1917 to 1924. A total of 9 were built. It was armed by a Madsen machine gun.

Very little is known about the aircraft, and only a handful of photos exist. However, after a lot of research at the national archives, other museums, and with help from private individuals, I have managed to acquire enough information to build a 1:5 scale model. You can see the scale build here.

Specifications

Crew: 2 (pilot + observer)
Length: 8.0 m
Wingspan: 11.54 m
Engine: Argus 140 HP
Cruise Speed: 120 km/h
Max Speed: 139 km/h
Empty Weight: 786 kg
Full Weight: 1111kg