From an unofficial German source which may or may not be trustworthy, comes a description
of a bomb built up out of staves and hooped like a barrel, with liquid air as a bursting
The material was plastic wood consisting of seven or eight pressed layers with a total
thickness of about 60 mm (2.37 in); the steel hoops were about 3 inches
wide. In length, the bomb was about 5 meters (16.4 ft); in diameter, about a
meter (39.4 in). The weight was not stated. In the dome-shaped head was a sensitive
fuze and detonator. The explosive charge was stated to be liquid air.