H-maskinen was an aircraft designed and build by Orlogsværftet (Naval Dockyards) in Copenhagen. The first flight was in 1917 and was in service at Hærens Flyveskole (Royal Danish Army Flying School) from 1917 to 1924. The aircraft could be armed with a Madsen machine gun mounted on the upper wing center-section. A total of 9 were built.

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

Specifications

Crew: 2 (pilot + observer)
Length: 8.00 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