Atch_1_Product_Description_as_of_27_April_2018.pdf

PRODUCT DESCRIPTION

Naval Special Warfare Command

Combat Rubber Raiding Craft Platforms

1. OBJECTIVE

The Contractor/s shall provide the personnel, management, materials, and equipment (not otherwise provided by the Government) necessary to provide platforms for combat rubber raiding crafts.

2. BACKGROUND

The Naval Special Warfare Command requires platforms to be used for the execution of air drop training operations.

Combat rubber raiding crafts are deployed from C-130 aircraft and rigged on platforms during real-life and training scenarios.

3. DESCRIPTION OF REQUIREMENT

3.1. Description and Capabilities: Platforms are designed to be used in the execution of air drop training operations, specifically for deploying Combat Rubber Raiding Craft from C-130 aircraft during real-life and training scenarios.

3.2. Specifications/Salient Characteristics: Platforms shall be built to the exact specifications from the attached NAVSEA SS400-AD-MMO-010, to include material and hardware, as outlined in Appendix 1 to this Product Description.

4. DELIVERY INFORMATION

Delivery address: To be determined per contract action.

5. SECURITY

Contractor must be able to obtain personnel and vehicle access to military installations. Contractor is responsible for coordinating all necessary access through the local Military Pass and Decal Office.

6. QUALITY ASSURANCE

The Government reserves the right to perform inspections and surveillance to evaluate the Contractor’s compliance to the contract terms to include proper delivery of quantity and type of goods. The Government will make every effort to ensure that the surveillance methods used are conducted in an objective, fair, and consistent manner.

Chapter 2

2-2 INTERIM TM 4-48-04/MCRP 4-11.3P/NAVSEA SS400-AD-MMO-010/TO 13C7-51-21 11 January 2017

Figure 2-2. Combat expendable platform built

Wing P4.7 Combat Rubber Raiding Craft (CRRC) Inflatable Boat with Outboard Engine (OE)

11 January 2017 INTERIM TM 4-48-04/MCRP 4-11.3P/NAVSEA SS400-AD-MMO-010/TO 13C7-51-21 2-3

1. Mark, cut, and layout two 4- by 4- by 144-inch pieces of treated lumber to be used as longitudinal stringers. Place them 75 inches apart on a level surface, with the crowns of the stringers down. See item 1 in figure below.

2. Mark, cut, and layout four 2- by 6- by 75-inch pieces of treated lumber to be used as lateral stringers across the longitudinal stringers, placing one at each end and the other two at the center. See item 2 in figure below.

3. Mark, cut, and layout four 2- by 4- by 75-inch pieces of treated lumber to be used as lateral stringers across the longitudinal stringers, placing the two stringers next to each 2- by 6- by 75-inch end stringer.

See item 3 in figure below.

4. Using the measurements shown, measure and mark reference lines and position the eight lateral stringers in place. Apply waterproof construction adhesive to each lap joint. Square the platform frame and tack the lateral stringers to the longitudinal stringers using 1 3/4-inch screws. Place each screw 3 inches inboard of each lateral stringer. See item 4 in figure below.

Figure 2-3. Platform frame built

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5. Turn the frame over and square the frame. See item 5 in figure below.

6. Mark, cut, and place two 2- by 6- by 144-inch pieces of treated lumber to be used as longitudinal stringers on the frame. Assemble and position the inboard side of each stringer 3 1/2 inches from the center of the frame’s width. This will create a 7-inch space between the two inboard longitudinal stringers. See item 6 in figure below.

7. Ensure the platform is still square and mark reference lines for the inboard longitudinal stringer placement across each lateral stringer. Apply waterproof construction adhesive to each lap joint and tack the longitudinal stringers to the outboard lateral stringers using 1 3/4-inch screws placed 2-inches inboard from each end. See item 7 in figure below.

8. Drill two diagonally spaced 3/16-inch diameter pilot holes, 2 1/2 inches deep at each lateral stringer intersection for the two inboard longitudinal stringers. Install 2 1/2-inch screws into each pilot hole.

See item 8 in figure below.

Note. Ensure the screw heads are tightened flush with the surface of the longitudinal stringers.

Figure 2-3. Platform frame built (continued)

11 January 2017 INTERIM TM 4-48-04/MCRP 4-11.3P/NAVSEA SS400-AD-MMO-010/TO 13C7-51-21 2-5

1. Turn the platform over so the lateral stringers are facing up and ensure the frame is square. See item 1 in figure below.

2. Apply waterproof construction adhesive to one side of each spacer block. Adhere the four 2- by 4- by 10-inch spacer blocks to the outboard longitudinal stringers as shown, maintaining 7 ½-inches between the lateral stringers and stringer blocks. See item 2 in figure below.

3. Center and adhere the two 2- by 6- by 32-inch spacer blocks on the inboard longitudinal stringers. See item 3 in figure below.

4. Drill two diagonally spaced 3/16-inch diameter pilot holes, 4-inches deep, and 1 ½-inches from the ends of the lateral stringer. Install a 4-inch screw into each pilot hole. Ensure the screw heads are tightened flush with the surface. See item 4 in figure below.

Note. Do not position the pilot holes on the extreme corners of the frame where the corners will be cut-off later.

5. Drill a 3/16-inch diameter pilot hole 2 ½-inches deep, and 1 ½-inches from the end of each spacer block. Drill one hole in each end of the four outboard spacer blocks and two holes at each end of both inboard spacer blocks. Install a 2 ½-inch screw into each pilot hole. Ensure the screw heads are tightened flush with the surface. See item 5 in figure below.

Figure 2-4. Frame spacer blocks installed

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1. Apply waterproof construction adhesive to each lateral stringer and spacer block. Mark, cut, and layout three 3/4- by 48- by 75-inch sheets of plywood across the platform frame, positioning the plywood flush with the frame’s edges. Screw each plywood sheet to the platform frame using 1 3/4-inch screws placed 2-inches in from the corner of each plywood sheet. See item 1 in figure below.

2. Using a chalk line, locate and mark the centerline of each lateral stringer across the plywood. Repeat for the four longitudinal stringers. See item 2 in figure below.

3. At the reference line intersection, drill a 3/8-inch diameter hole through the plywood and framing. See item 3 in figure below.

Figure 2-5. Frame plywood installed

11 January 2017 INTERIM TM 4-48-04/MCRP 4-11.3P/NAVSEA SS400-AD-MMO-010/TO 13C7-51-21 2-7

4. Using a 7/8-inch countersink bit, countersink a 1/4-inch hole in each 3/8-inch diameter hole prepared in step 3. See item 4 in figure below.

5. Turn the platform over. Using a 1-inch diameter countersink bit, countersink a 3/4-inch hole in each outboard 3/8-inch diameter hole prepared in step 4. Additionally, countersink a 3/4-inch hole in each inboard 3/8-inch diameter hole prepared in step 4. See item 5 in figure below.

Note. Do not countersink holes too deep or the platform will be structurally weakened.

6. From the plywood side, insert 6-inch carriage bolts into each outboard longitudinal stringer hole and 4-inch carriage bolts into each inboard longitudinal stringer hole. Tap the bolt heads into place. Install a washer and nut to the outboard bolts only and tighten until the top of the bolt head is flush with plywood surface. See item 6 in figure below.

Note. The washers and nuts will be installed onto the inboard carriage bolts when the platform is turned over.

Figure 2-5. Frame plywood installed (continued)

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7. Starting 4 1/2 inches inboard from the sides and 1 inch in from each end of the platform, drill a 2-inch deep pilot hole using a 3/16-inch bit at 6-inch intervals. Repeat for the plywood edges that are flush together across the lateral stringers. Install a 2-inch screw into each pilot hole and tighten flush with surface. See item 7 in figure below.

8. Using the inboard lateral stringer chalk lines previously prepared as a guide, drill 3/16-inch diameter pilot holes across the platform at each lateral stringer. Start 4 1/2 inches inboard from the platform side at 6-inch intervals. Install a 2-inch screw into each pilot hole and tighten flush with the surface. See item 8 in figure below.

9. Drill additional pilot holes 1 inch inboard from the ends of each inboard lateral stringer, 1 inch inboard from each platform edge and at 6-inch intervals into the spacer blocks. Install a 2-inch screw into each pilot hole and tighten flush with the surface. See item 9 in figure below.

Figure 2-5. Frame plywood installed (continued)

11 January 2017 INTERIM TM 4-48-04/MCRP 4-11.3P/NAVSEA SS400-AD-MMO-010/TO 13C7-51-21 2-9

1. Mark a 2-inch square on each corner of the platform. Draw a diagonal line across each square as a reference line and saw off each corner with a circular saw to start the cut, and a handsaw to finish through the cut thickness. See item 1 in figure below.

2. Turn the platform right side up, install washers and nuts to the inboard carriage bolts, and tighten until the top of the bolt head is flush with the plywood surface. See item 2 in figure below.

3. Drill a 2-inch hole, 3 inches and centered through the front lateral stringer and plywood as shown.

Label both sides of the 2-inch hole with “FRONT”. See item 3 in figure below.

Note. Inspect the platform. Make sure there are no protruding screws, nails, or bolts on the bottom of the platform.

CAUTION

Ensure that after drilling 2-inch holes, the platform is marked “FRONT” to ensure placement of CRRC is correct. Failure to ensure placement could compromise CEP and timing required for smooth deployment of G-12E(s).

4. Label the tie-down spaces on each longitudinal stringer as shown in figure 2-6.

Figure 2-6. Platform corners cut, bolts installed, and tiedowns numbered