Tactical and Technical Trends, No. 8, p. 28, contained preliminary
information on this new type of German bomb-thrower. Additional material
from Russia includes the following details:
The HE projectile, which weighs 181 pounds, has a diameter of 11 inches and a maximum
range of 2,088 yards, while the incendiary projectile has a diameter of 12 inches and
a maximum range of 2,200 yards. The burst of the incendiary projectile is effective
over an area of approximately 75 feet by 45 feet, and the burning petroleum in this
area is reported to ignite any inflammable material to a height of 8 or 10 feet above
The Model 40 Wurfgerät is fired from a stationary mount, with 4 projectors
to a mount. These mounts are normally arranged either in line or in checkerboard
formation. The minimum distance between mounts is 6 feet, and between rows of
mounts, 15 feet. Behind each row of mounts a strip about a yard wide is cleared of
vegetation to prevent a possible fire caused by the rocket propulsion system.
The ignition of the projectiles is so arranged as to secure a 2-second interval
between rounds. When the mounts are arranged in a series of rows, the last row is fired first.
Since fire is relatively inaccurate, there is a large zone of dispersion, making
the weapon useful only for area firing.
Comment: This rectangular pattern of burst may be due to the fact that
the projectile, with its blunt nose, does not penetrate, but bounces forward for
several yards after impact, giving a pattern of burst which is longer than it