Hackenberger H / Helioplane
 
Hacken-H
 
A 1930 twin-engine flying pancake-type with heart-shaped parasol wing built by A L. Hackenberger.
 
The Hackenberger H, or Helioplane, was powered by two 4-cyl "Scroggies".
 
The aircraft was registred NX18966 c/n 5H-1 (as H) as a single seater.