A recent report describes this as a single-barreled chemical or smoke
mortar (Nebelwerfer), which in essential details is similar
to the 81-mm mortar, though larger. The actual caliber of the weapon
is 105 mm. An HE shell and two types of smoke shells are known to exist.
a. HE Bomb 10-cm Wurfgranate 37
This shell is conventional in appearance and design. Fitted with a nose
percussion fuze, its internal arrangements are similar to those of the usual
HE shell. Immediately below the fuze is a booster, which is contained in a steel
holder screwed into the nose of the shell. A small smoke box is situated below the
booster. The shell is gray-green in color.
The following are the main dimensions:
|Weight of shell|| ||16 lbs|
|Weight of bursting charge||3.75 lbs (TNT)|
|Length of shell||17 in (approx)|
|Diameter, across body||4 in (approx)|
|Diameter, across tail fins||4 in (approx)|
b. Smoke Bombs 10-cm Wurfgranate 35
The existence of two types has been established from the examination of
German documents. The internal arrangements appear to be similar to those
for the standard types of German smoke shell.
Both types of shells are fitted with a nose fuze and both have a central
tube containing a bursting charge of picric acid. It can be assumed that there
will be a booster fitted underneath the fuze. One of the shells is reddish-brown
in color and has "Nb" stencilled on the body, while the other is gray-green in
color and has "Nb St" stencilled on the body.
c. Propelling Charges
The propelling charges consist of a primary charge and four auxiliary
charges. The primary charge, which consists of 17 grams of ungraphited black
powder, is contained in a blue-colored cartridge with a black primer
color. Each auxiliary charge weighs 21 grams and is contained in a silk bag. These
charges consist of a double-base propellant containing nitro-glycerine and
having the following dimensions:
External diameter - 3.5 in (approx)
Internal diameter - 1.75 in (approx)
Thickness - 0.4 mm
The following system is used by the Germans to denote charges:
Charge 1 (Erste Ladung) - primary charge;
Charge 2 (Zweite Ladung) - primary charge plus 1 auxiliary;
Charge 3 (Dritte Ladung) - primary charge plus 2 auxiliaries;
Charge 4 (Vierte Ladung) - primary charge plus 3 auxiliaries;
Charge 5 (Fünfte Ladung) - primary charge plus 4 auxiliaries.
The shells are issued one to a container, and the total weight of shell
and container is 20.75 pounds.