1/700 RM Roma 381mm (15") Md. 1939 Guns B. Bags x3

1/700 Scale RM Roma 381mm/50 (15") Mdl. 1939 Guns x3 with Blast Bags. These are incredibly highly detailed parts modelled using plans as well as many reference photographs to make these the most accurate and detailed RM Roma 381mm/50 (15") Model 1939 Guns  available. These parts are NOT lifted from computer game models like some other Shop Owners parts. Check to see which sellers show separate renders of their items and not just the Shapeways default render. See My Shop for versions without Blast Bags: http://shpws.me/QJJt

Details include:

• 3x Mountings with separately printed barrels, digitally sculpted Blast Bags can be drilled to accomodate Brass Barrels
• accurate rivet and hex nut placement
• Sighting Hatches, accurate Venting and Access Hatches

Historical Data:
A powerful weapon for its caliber, with a maximum range exceeding that of all other battleship guns despite its modest maximum elevation. This superb performance had a price in that they suffered from excessive dispersion and a very short barrel life, which was only about half that of other nation's large-caliber guns.

The guns were built in two batches of twenty guns each with the Model 1934 guns arming Littorio and Vittorio Veneto and the Model 1939 guns arming Roma and Impero. Ansaldo built the guns for the Littorio and Impero and three guns for Roma. Odero-Terni-Orlando (OTO) built the guns for Vittorio Veneto and six guns for Roma. The guns made for Littorio differed in that there were six major components rather than the four components of the other guns. There were small differences between models and manufacturers, but all except those for Littorio were constructed of an A tube in two layers over the chamber and part of the rifled bore, the outer layer continuing to the muzzle. There was a jacket over about 72% of the total length and a breech bush screwing into the jacket. These later guns were equipped with a loose liner which could apparently be removed from the breech end of the rifle. All guns used a Welin breech-block that was hydro-pneumatically operated and opened to the left in the left gun and to the right in the center and right gun. A compressed-air smoke scavenging system was used to remove propellant gasses after the guns fired.

Unlike many other European 38 cm guns, the bore of this gun was actually 381 mm (15.0").

Cleaning Information
Some part cleanup will be necessary. The 3D printing process uses a waxy substance to support certain part features during the printing process. Although the parts are cleaned by Shapeways, some waxy residue may remain.  It can be safely removed with water and a mild aqueous detergent like "Simple Green" using an old, soft toothbrush, Q-tips or pipe cleaners. During the printing process, liquid resin is cured by ultraviolet light. Microscopic bits of resin may remain uncured.

Let your parts sit in direct sunlight for a few hours to fully cure the resin.  
Water-based acrylic paints meant for plastics is strongly recommended. Other paints, especially enamels, may not cure on Frosted Detail 3D-printed plastics.
Use dedicated model sprue cutters to remove parts to minimise the risk of damage to parts.
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