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1/200 HMS Hood 7" UP Launchers x5 3d printed 1/200 HMS Hood 7" UP Launchers x5

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1/200 HMS Hood 7" UP Launchers x5

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$31.43
3D printed in matte translucent plastic that showcases incredibly fine and intricate details.
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Product Description
1/200 Scale Royal Navy 7" UP (Unrotated Projectile) Launchers x5 as seen on many early WW2 Royal Navy ships. This set is ideal for the 1/200 Scale Trumpeter HMS Hood. Modelled from plans and using many reference photos. Note: these have been modelled without the fine mesh around the rocket mount due to 3d printing limitations. The mesh is only seen when viewed close up to the actual launcher as seen in photographs.

Details include:
  • Sighting Hatch open
  • Hex Nuts, Rivets, Hinges and Handles 
  • Rocket Mount printed seperately for ease of painting and addition of thin wire mesh if desired
  • Trunnion Pin is printed around the back of the Operators enclosure.

Historial InformationIn the late 1930s the British saw a need for an intermediate, close-range AA weapon to supplement their 2-pdr AA guns. The UP Mark I was one of the small rocket weapons designed to meet this need and was employed on many large British warships early in World War II.

UP stands for "Unrotated Projector." "Unrotated" meant that the barrel did not have any rifling, i.e., the projectile was not spin-stabilized. Each emplacement was a set of twenty smooth-bore tubes, usually fired ten at a time. Cordite was used to ignite ("Project") a 3-inch (7.62 cm) rocket motor which propelled a fin-stabilized 7-inch (17.8 cm) diameter Parachute and Cable (PAC) rocket which carried a 8.4 oz (238 g) mine. When the rocket reached approximately 1,000 feet (330 m), it exploded and put out the mine which was attached to three parachutes by 400 feet (122 m) of wire. The design concept was that if a plane hit the parachutes or the wire, it would then pull the mine into itself.

These UP projectiles were kept in ready lockers close to the projectors. The sinking of HMS Hood showed that these stored weapons were rather flammable. They were also found to be an almost totally ineffective weapon, as the barrage took too long to establish and was easily avoided. In addition, reloading was slow and the mines showed an alarming tendency to drift back onto the firing ship. For these reasons, the UP was gradually replaced on surviving ships with either the British 2-pdr or the Bofors 40 mm heavy AA machine gun. For instance, shortly before she was sunk by the Japanese, HMS Prince of Wales had all three of her UP emplacements replaced with 2-pdr mounts.

Other information: The rockets were 32 inches (81.3 cm) long and weighed 35 lbs. (15.9 kg). The effective horizontal range was 3,000 feet (910 m) and the parachute sinking speed was 16 to 23 fps (5 to 7 mps). The 20-tube mounting weighed about 4 tons (4 mt).



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.
Please take a look at my other items.      
            
Painting tips and preparation   





    





                      









        

 
Details
What's in the box:
200 UP Launcher Sprue x5.stl
1/200 HMS Hood 7" UP Launchers x5
Dimensions:
5.36 x 4.38 x 1.56 cm
Switch to inches
2.11 x 1.72 x 0.62 inches
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Success Rate:
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Rating:
Mature audiences only.
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