The Japanese Type 93 modified flame thrower is very similar to the small
flame thrower of the same type number (see sketch) described in Tactical and
Technical Trends No. 18, p. 8. For the sake of simplicity in comparison, the
flame thrower described in this article has been designated "Type 93 Modified". It
is not known whether this is a later or earlier model of the Type 93 or
even an entirely separate type. However, the shorter length and slightly lighter
weight of the nozzle of the modified model plus other mechanical improvements
discussed below indicate that it is probably a later model.
The fuel tanks and rubber hoses of the two models are identical. The
differences are found in the nozzle assemblies as shown on the following page.
||Type 93 Modified|
|Overall length of nozzle assembly (1)||
||47 1/8 in||
||35 1/2 in|
|Weight of nozzle assembly||
||8 1/2 lbs|
|Retaining nut on firing mechanism (inside nozzle outlet)||
||No locking screw||
||Has locking screw|
|Ratchet track (2) on back of revolving cylinder||
|Nut (3) on firing handle||
||Has tapered locking pin|
|Nut (4) on firing mechanism operating crank||
||Has tapered locking pin|
|Cartridge chambers (5) in revolving cylinder||
||0.44 in diameter (for Japanese cartridge)||
||0.484 in diameter (for U.S. cal. .30 cartridge)|
|Firing handle, fuel pipe and other fittings||
|Nozzle outlet tip (6)||
On the "Type 93 Modified" flame thrower, the pin, which actuates the
revolving cylinder, operates in the inner track, and the firing pin and locking pin
operate through the outer track. This feature makes it possible for the slots in
each track to be tapered in opposite directions and thereby eliminates some wear
on the locking pin and the track itself.
It is very likely that subsequent to the capture of this flame thrower the
chambers were enlarged to permit the use of a cartridge improvised from U.S.
caliber .30 cartridge cases.
The following points tend to indicate that "Type 93 Modified" flame
thrower is an improvement or a more recent model of the Type 93 previously
(1) The shorter length and slightly lighter weight of the nozzle give it a
better balance, making it much easier to handle;
(2) Should the nozzle outlet tip be damaged, the old Type 93 nozzle would
have to be sent to the rear for repair, while the part is replaceable
in "Type 93 Modified."
(3) The inclusion of several locking pins offers definite mechanical and
safety advantages. (In a recent test of the flame thrower not so
equipped, the retaining nut on the firing mechanism came loose, resulting in
a failure to fire.)
(4) The double ratchet design of the revolving cylinder is mechanically
better than the single ratchet of Type 93.
(5) The replacement of various brass parts with steel, while not an
advantage, may indicate a more recent date of manufacture.
Conversely, most of these features involve added machine work and the present
tendency is to simplify rather than complicate design.