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1 Intro/Preparation
2 Hull Assembly
3 Sail
4 Rudders
5 Stern Planes
6 Drive Train/WTC
7 Linkages
8 Ballast & Trim
9 Detail & Paint
10 On Patrol
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DETAIL & PAINT - Detailing The Boat

Deck Fittings - Permit kits come with a selection of white metal parts to represent all the major deck fittings such as cleats, windlasses, etc. The hull is molded to represent these fittings in their retracted, at-sea positions. To depict them in their extended positions, drill a pilot hole for each fitting in the upper hull and file out the opening. Clean the flash from the white metal part and insert it in the proper hole. From the back side, apply epoxy to glue it in place.

Stern Light - 1. Drill a hole in the upper rudder to accept the white metal part depicting the stern light beacon.

2. Apply a drop of CA to the bottom of the stern light part and insert it in the hole.

Periscopes & Masts - An assortment of resin and metal parts are included to depict the various periscopes and masts. Using the plans, drill and file out holes in the sail top for the masts you wish to install.

1. For this project only the single attack periscope was used. Cut a length of brass tube to represent the periscope barrel. Clean the white metal periscope top and glue it in one end with CA.

2. Next, drill a hole in the sail top. Insert the periscope. Friction will hold it in place during patrols. For other masts, insert a small threaded rod in the bottom of the mast. A washer and nut can then be applied from the inside of the sail to hold it in place.

MBT Vents - A tree of stainless steel photo-etched Main Ballast Tank vents are supplied with the kit.

1. Cut or twist a vent from its tree. File off any rough edges. Due to their tiny size, it is best to hold the part with a pair of needle nosed pliers. To increase grip and avoid scratching the part, wrap masking tape around each half of the pliers.

2. Place a drop of CA in the beveled part of the MBT vent then insert the photo-etched part. It should lay flat with the hull's surface. Early Permits had their stainless steel vents painted black but at sea the paint would quickly wear off. As a result, they were left unpainted starting in the mid 1960's.
  Zincs - Once the final paint job is finished, the zincs should be affixed to the stern. Their location is indicated on the plans and scribed in the hull. Place masking tape on either side of the scribe mark, apply CA to the underside of the metal part and lay it between the tape in the proper location. This prevents the glue from damaging the adjacent paint. As full scale zincs were unpainted, leave these parts in their raw, white metal condition.
 

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Which Permit?

The ThorDesign Permit kit depicts USS Permit (SSN-594) in it's as-built condition circa 1962. However, the boats of this class served well into the 1990's and underwent many modifications. To properly detail your model, chose the specific boat and service period you wish to depict and research her thoroughly. For the purpose of these instructions, we chose to model USS Thresher (SSN-593) at the time of her loss on April 10, 1963.

The following boats made up the Permit class:

  • SSN-593 Thresher
  • SSN-594 Permit
  • SSN-595 Plunger
  • SSN-596 Barb
  • SSN-603 Pollack
  • SSN-604 Haddo
  • SSN-605 Jack
  • SSN-606 Tinosa
  • SSN-607 Dace
  • SSN-612 Guardfish
  • SSN-613 Flasher
  • SSN-614 Greenling
  • SSN-615 Gato
  • SSN-621 Haddock