Dummy_DMM_Stores_SOW_Final_20170905_Redacted.pdf

14944-17-001

SOW No. 14944-17-001 August 2017

STATEMENT OF WORK

FOR

FABRICATION SERVICES OF

5-PERCENT-SCALE AFSEO CTS STORE MODELS

DISTRIBUTION STATEMENT

Distribution authorized to Department of Defense and U.S. DoD contractors only due to OPERATIONAL USE; 14 August 2017. Other requests for this document shall be referred to the Air Force SEEK EAGLE Office, 96SK, Eglin AFB, FL 32542

WARNING

This document contains technical data whose export is restricted by the Arms Export Control Act (Title 22, U.S.C. 2751 et seq.), the Export Administration Act of 1979, as amended, Title 50 U.S.C., App. 2401 et seq., Executive Order 12470, or the International Traffic in Arms Regulations (22 CFR 120-130). Violation of these export control laws is subject to severe criminal penalties.

Disseminate in accordance with provisions of DoD Directive 5230.25.

DESTRUCTION NOTICE

Destroy by any method that will prevent disclosure of contents or reconstruction of the document.

ARNOLD ENGINEERING DEVELOPMENT COMPLEX (AEDC)

ARNOLD AFB, TENNESSEE 37389

Table of Contents

1. SCOPE OF WORK

2. REFERENCES

3. FABRICATION REQUIREMENTS

3.1 General:

3.2 Drawing Requirements:

3.3 Technical Requirements:

3.4 Coordination and Execution of Work:

3.5 Submittal Schedule:

ATTACHMENT 2: FIGURES

ATTACHMENT 3: TABLES

Figures

Figure 1. Model-Scale GBU-39/B Store

Figure 2. Solid Model Depictions of GBU-39/B Dummy Store

Tables

Table 1. Anticipated Test Maximum Conditions

Table 2. Predicted 5%-Scale Store Model Aerodynamic Loads

Table 3. Surface Roughness Information

Table 4. Cylindrical Fits for Models

Table 5. Model Acquisition Timeline

1. SCOPE OF WORK

This effort is for fabrication of twenty-one (21) dummy 5-percent-scale store models. The stores are designated GBU-39/B. The dummy store models shall have fins and tails in the stowed position. It is expected the stores will be created using a “Direct Metal Melting”-type process to achieve model fidelity, cost, and schedule goals.

1.1 Deliverables for this fabrication effort include:

A. Twenty one (21) dummy store models B. 3-D CAD geometry file of item A C. Individual model inspection reports

2. REFERENCES

Fabrication shall conform to AEDC-provided 3D CAD geometry files and the publications listed below.

2.1 AEDC Codes and Standards (provided upon request):

2.2 GBU-39/B 3D CAD geometry file, provided by AEDC, in “.stp” file format.

3. FABRICATION REQUIREMENTS

3.1 General:

3.1.1 The Contractor is responsible for the professional quality, technical accuracy, and the coordination of all design, drawings, and other services furnished. The Contractor shall, without additional compensation, correct or revise any errors, deficiencies, or inadequacies.

3.1.2 Neither Contractor’s review, approval, or acceptance of, nor payment for the services required under this contract shall be construed to operate as a waiver of any rights under this contract or of any cause of action arising out of the performance of this contract, and the Contractor shall remain liable to the government in accordance with applicable law for all damages to the government caused by the contractor’s negligent performance of any of the services furnished under this contract.

3.2 Drawing Requirements:

Drawings shall be complete, and show all physical work to be accomplished.

3.3 Technical Requirements:

3.3.1 Fabricate twenty-one (21) dummy wind tunnel store models using OML geometry in CAD files provided by the government. The dummy store models shall have fins and tails in the stowed position.

Sketches of the stores are depicted in Figures 1 and 2.

3.3.2 Completed models will be used in an environment as indicated by conditions listed in Table 1.

3.3.3 Model anticipated total loads are as indicated in Table 2.

3.3.4 Using a DMM-type process, the models shall be constructed of appropriate materials (e.g. 13-8, 15-5, & 17-4 stainless steels or titanium (preferred)) to maximize safety factor margin while in use.

3.3.5 Model construction shall be accomplished in such manner to minimize voids and internal residual stresses, and maximize material strength to approach that of traditional materials. This implies and requires a very fine (0.002” – 0.004”) build layer thickness.

3.3.6 For structural integrity, dummy store tail fins may be thickened slightly or planar versus contoured. Fins shall be fabricated as one piece with the body.

3.3.7 Dummy store models shall bolt to the suspension model hardware using the AEDC-prescribed bolt pattern that consists of two (2) socket-head cap screws spaced 0.70 inches apart with the forward bolt 1.330 inches aft of the store nose. (See AEDC-provided 3D CAD geometry file for details.)

3.3.8 Store models’ OML should be about ±0.005 inches of AEDC-provided contour.

3.3.9 Store model OML surface roughness (RHR) shall be ≤63. Store model internal “fit” surface roughness shall be ≤32. Refer to Tables 3 and 4.

3.3.10 All models shall be electrically conductive.

3.3.11 Individual models shall be distinguished by permanent etching of a unique, sequential part number (e.g. GBU-39/A-001, GBU-30/A-002, etc) on the body using a readily-legible size font.

3.3.12 Minimize the potential for component failures that result in liberations into the airstream (foreign objects) that may ultimately result in foreign object damage (FOD). Small protuberances shall be fabricated as part of the model versus “glued”. No use of “safety wire” and/or “tweezer welding” on model assemblies will be accepted.

3.3.13 All fabrication material shall be provided by the Contractor.

3.3.14 Submit detailed individual model inspection reports at final delivery.

Report should include a verification of drawing dimensions within acceptable tolerances per Ref. ASME-Y14.5 of above technical requirements.

3.3.15 Convene, at government discretion, an optional “Model Pre- Acceptance” meeting at Contractor’s facility, after fabrication is complete, and prior to delivery of models to the government.

3.3.16 A follow-up model hardware inspection will be accomplished by the government, upon receipt of hardware from Contractor, to conclude acceptance testing.

3.3.17 Model design, fabrication, and delivery to the government are required NO LATER THAN 1 December 2017. An earlier delivery is acceptable. (See Table 5 for project timeline)

3.4 Coordination and Execution of Work:

3.4.1 Record Drawings: The Contractor shall be responsible for verifying the as-built conditions, as well as all interfaces between new and existing hardware.

3.4.2 The Contractor shall furnish technical support and project status reporting as requested. Periodic telecoms or appropriately restricted website presentations shall be employed to improve communications and effectiveness.

3.5 Submittal Schedule:

3.5.1 Included in the quote, the vendor will provide examples of similar past work. This also includes alternative methods not envisioned within this statement of work (SOW), lessons learned, industry best practices, etc.

3.5.2 The dummy models are expected to become a part of a long-term inventory. Dimensional stability and durability are key attributes.

How these goals will be met must be explained in the response.

3.5.3 Changes to the provided geometry is permissible to close voids or eliminate small features that otherwise cannot survive the manufacturing process. Such alterations shall be brought to the attention of the AEDC technical PoC for review and consent prior to manufacture.

Figure 2. Solid Model Depictions of GBU-39/B Dummy Store

ATTACHMENT 3: TABLES

Table 1. Anticipated Test Maximum Conditions

Item M PT TT QINF 1 0.60 1200. 100. 237.

2 0.70 1200. 100. 297.

3 0.80 1200. 100. 353.

4 0.90 1200. 100. 402.

5 1.00 1200. 100. 444.

6 1.20 1200. 100. 499.

7 1.40 1200. 100. 517.

8 1.60 1200. 100. 506.

Where:

M – Mach number PT – Tunnel Total Pressure, psfa TT – Tunnel Total Temperature, °F QINF – Tunnel Dynamic Pressure, psfa RE – Tunnel Reynold’s Number, 10-6/ft

Table 2. Predicted 5%-Scale Store Model Aerodynamic Loads (NOTE: Loads act simultaneously at the store’s center.)

COMPONENT LOAD

NORMAL FORCE ±10 lbs

SIDE FORCE ±10 lbs

AXIAL FORCE ±3 lbs

ROLL MOMENT ±3 in-lbs

PITCH MOMENT ±10 in-lbs

YAW MOMENT ±10 in-lbs

Table 5. Required Hardware Acquisition Timeline

Aug

Sep

Oct

Nov

Dec

Jan

Feb

Mar

Bid X

Award X

Fund X

Design XX XX

Fab XXX XXXX

Inspection X

Delivery X

Acceptance X