Japanese 81mm Mortar, Type 97

World War II

A Subject of Mortars in Miniature.com

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Type 97

The Kit:
This 1/35th scale kit is from the Japanese company Fine Molds, and is cast in white metal and very well done indeed. Some minor parting line removal required, but other than that, this kit was a real jewel. Some of the detail parts are very small and difficult to handle, but it was well worth the effort to build.
 

Type 97

The Details:
The only items added to this kit were the tension chain and spring combination that is common to most mortars. Fine chain from Builders in Scale was used and to this a length of fine wire coiled to represent the spring, was added to one end of the chain.

The Base and Groundwork:
This base is cut to 3-1/2 inches in diameter also and is of pine, stained with a natural stain and sealed with multiple coats of Polyurethane. Sculptamold mixed with white glue was added for the groundwork. Various ground up sticks and twigs were used for the jungle litter. I made the palm fronds from paper sandwiched to a length of wire, cut to shape and painted. There are dried-flowers added along with some miniature rose leaves added in there also.

Type 97

Type 97

Type 97

Type 97

Painting, Weathering and Finishing:
With this being a metal kit, I first primed the model with PollyScale Acrylic Metal Primer.
PollyS/PollyScale Acrylic Paints were used throughout. Winsor and Newton Oils thinned with Loew-Cornell Odorless Brush Cleaner and Thinner were used for the washes. Dry brushed in part with PollyS Metalline series Acrylic Paints. PollyScale Acrylic Flat Coat was then applied overall to the finished subject.


General Info:
This weapon is very similar in appearance to both the
U.S. M1, 81mm Mortar and to the Italian 81/35 Mortar. I don't know which of the three similar mortars appeared first, but the Type 97 mortar was introduced into service in 1937.

Evidently, the only type of Mortar Bomb recovered from this weapon was of the Model 100 HE (High Explosive) type. The fuse for this type of bomb was adjustable for either instantaneous or for a delayed detonation. Other characteristics of this type of bomb were similar to the M43A1 as used on the U.S. M1. The propelling charge differed from the U.S. version as each charge was contained in a small coated (?) cloth bag.

This was the most common mortar used by the Imperial Japanese Army during World War II, and it was also produced for the Imperial Japanese Navy, under the designation of Type 3 Mortar.

Actual Data:
Barrel Length: 1,269mm.
Length of Bore: 1,218.9mm
Thickness of tube wall: 6.99mm
Length of Baseplate: 419mm
Width of Baseplate: 673mm
Elevation: +45 to +85 degrees.
Muzzle Velocity: 196mps.
Weight: 67kg.
Range (HE): 2,850m.
Shell Weight (HE): 3.33kg.

Jap. Fuse drawing

British Training drawing
Courtesy of the
Johannesburg, South Africa
National Military Museum

via Lt. Col. William Marshall


References:
Imperial Japanese Army Home Page

"Second World War Combat Weapons, Volume 2: Japanese", W. H. Tantum IV and E. J. Hoffschmidt

Mr. Kevin Campagna - United States


Japanese 81mm Mortar, Type 97
Comments, suggestions, additional info?

   

 

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