1/72 Mousetrap Launcher Mark 20

1/72 High details model Mousetrap Launcher Mark 20  for WWII USN Patrol Craft and PGM boats.

Mousetrap rocket projector with four rails. This weapon was originally classified as a Rocket Launcher and retained its original Mark number when reclassified as an ASW projector. This weapon was developed to take the place of Hedgehog for smaller ships such as patrol craft which could not withstand the recoil forces generated by that weapon.

Real scaled from original
Hollowed to saved material
Model unpainted

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Some part cleanup will be necessary.  The 3D printing process uses a waxy substance to support certain part features.  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.  Customers report that "Bestine" and "Goo Gone" also work well.

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.