2010010788216 _Propeller_140_date1020.pdf

JPH_1020

WORK ITEM 1: 2010-01-078-8216, Propeller, Fabrication

1. SCOPE

1.1 Intent. This supply item describes the requirements for the Contractor to fabricate a new of bronze propellers used on 140 FT WTGB Icebreaking Vessels.

1.2 Government-Furnished Property.

None

2. REFERENCES

COAST GUARD DRAWINGS

Coast Guard Drawing 140WTGB-245-2 REV A, DATED 01/22/18, PROPELLER & OFFSETS 140 FT WYTM CUTTER (ALL)

COAST GUARD PUBLICATIONS

None

OTHER REFERENCES

American Bureau of Shipping (ABS); ABS Guidance Manual for Bronze & Stainless Steel Propeller Castings Dated 1984.

ASQ/ISO/IEC 17025:2005, General requirements for the Competence of Testing and Calibration Laboratories MIL-DTL-2845E(SH) - DATED 18 AUG 1999, Propulsion Systems, Boat and Ship; Main Shafting, Propellers, Bearings, Gauges, Special

Tools, and Associated Repair Parts; Preservation, Packaging, Packing and Storage of MIL-STD-129R, Feb 2014 Military Marking for Shipment and Storage MIL-STD-2035A(SH) - DATED 15 MAY 1995, Nondestructive Testing Acceptance Criteria DOD-STD-2185(SH) - DATED 28 OCT 1986, Requirements for Repair and Straightening of Bronze Naval Ship Propellers

International Organization for Standardization (ISO) 1940-1, 2003, Mechanical vibration – Balance quality requirements for rotors in a constant (rigid) state – Part 1

ISO/IEC 16388-2007 Information technology — Automatic identification and data capture techniques — Code 39 bar code symbology specification.

ISO 9001, Dated 15 Sep 2015, Quality Management Systems – Requirements ISO/IEC 16388-2007 Information technology — Automatic identification and data capture techniques — Code 39 bar code symbology specification.

SAE J755-80 Dated June 1980, Marine Propeller-Shaft Ends & Hubs.

SAE-J-448A - Dated June 1963, Surface Texture Standard.

SAE AMS-T-22085 - DATED 01 June 1999, Tapes, Pressure-Sensitive, Adhesive, Preservation and Sealing–FSC 7510 International Organization for Standardization; ISO 484/2-1981 (E)- Shipbuilding - Ship screw propellers - Manufacturing tolerances -

Part 2: Propellers of diameter between 0.80 m and 2.50 m inclusive.

T9074-AS-GIB-010/271 - DATED 16 FEB 1999, Requirements for Nondestructive Testing Methods

3. REQUIREMENTS

3.1 GENERAL. The Contractor shall provide all equipment, labor, and materials to manufacture, , test, inspect, preserve, package, pack and mark a Right Hand (RH) 140 FT WTGB vessel propellers for the U.S. Coast Guard in accordance with the referenced drawing and data provided within this specification..

3.2 Foundry approval. The propeller shall be manufactured by an ABS Approved Foundry in accordance with ABS Guidance Manual. Foundry approval documentation including test coupon results for tensile, yield, elongation, and material chemical analysis shall be provided.

3.3 Material.

3.3.1 All materials shall be ABS Type 4 Nickel Aluminum Bronze as specified in ABS Guidance Manual section 1, part 1.2 (materials).

Classification or certification with ABS is not required.

3.3.2 The Contractor shall perform a material chemical composition analysis and a tensile properties test for each propeller casting. The documented results shall be submitted to the Coast Guard Contracting Officer for review/approval.

3.2.3 All material chemical composition analysis and tensile property tests shall be made by a laboratory meeting the calibration requirements in section 4.6 of this specification.

3.4 Test and inspection plan. The Contractor shall submit a test and inspection plan to the Contracting Officer for approval. This plan shall include the specific inspections and tests specified herein, and all tests and inspections made by the Contractor to verify conformance to every requirement and tolerance as specified in the cited drawings, technical publications, and this specification.

3.5 Construction of propeller castings. Each propeller casting shall be constructed in accordance with ABS Part 7 Section 10 entitled Guide for Bronze and Stainless Steel Propeller Castings (dated 2015), and USCG DWG. 140WTGB-245-2.

3.5.1. Each propeller casting shall be formed with one continuous pour.

3.5.2. Each casting shall include a provision to allow for an integrally cast coupon. This coupon shall be tested for it’s chemical composition and tensile properties referenced in 3.3.1. of this specification.

3.6 Propeller finishing. Each propeller may be finished using Computer Numerical Controlled (CNC) machining using equipment that can be programmed for automatic contouring of hydrodynamic surfaces OR in the conventional casting manner that employs hand grinding and finishing for obtaining required blade contour and profile dimensions.

3.6.1 The tolerances specified at the design sections shall apply to all hydrodynamic surfaces.

3.6.2 The Contractor shall demonstrate a manufacturing or inspection process that ensures tolerances for all hydrodynamic surfaces are met.

3.6.3 Dimensional Inspection shall be in accordance with this specification and USCG DWG. 140WTGB-245-2.

3.7 Dimensional tolerances. All tolerances shall be in accordance with USCG DWG. 140WTGB-245-2, ISO 484/2, Class II, and this specification. Notify Contracting Officer of any conflicts ore required clarifications:

3.7.1 Pitch may be measured by a computer controlled coordinate measurement machine that can be shown to be calibrated to and to produce equivalent accuracy to the methods of Section 4 of ISO 484/2 for Class II propellers in addition to the methods of Section 4.

3.7.2 Blade thickness at each 10 percent station shall be within plus or minus 0.030” or plus or minus 1.00 percent of the maximum thickness of the blade section.

3.7.3 Blade section half width at each design radius shall be plus or minus 0.15 percent of maximum section width.

3.7.4 Blade section half width between adjacent design radii shall be within 0.15 percent of maximum section width.

3.7.5 Pitch deviation at each design section shall not exceed plus or minus 1.00 percent.

3.7.6 Pitch variation between adjacent design sections on each blade shall not exceed 0.50 percent.

3.7.7 Average Pitch deviation of all design sections on each blade shall not exceed plus or minus 0.75 percent.

3.7.8 Angular spacing of the blade center axes shall be plus or minus 0.25 degrees.

3.7.9 Clearance under the fairing rod shall not exceed .030 inches and shall not vary at a rate greater than .005 inches per inch.

3.7.10 Propeller radius shall be plus 0.000 inches or minus 0.5 percent. NOTE: This tolerance supersedes the tolerance cited in drawing number 140WTGB-245-2.

3.7.11 Axial variation of Blade Center Axis relative to other blades at the .95 radius shall be plus or minus 0.250 inches.

3.7.12 Bores, keyways, hub dimensions & details - All bores, keyways, and hubs shall meet the dimensional requirements of SAE J755-80, Table 3 for hubs without sleeves, including surface finish.

3.7.12.1 The nominal hub bore diameter shall be as specified for each propeller in the deliverable list.

3.7.12.2 The hub shall be the full length of the taper as a minimum in accordance with table 3 or table 4 of SAE J755-80, unless otherwise noted in Appendix 2.

3.8 Weld repairs. If the castings require any weld repairs, welding procedures, welders, and welding operations shall be qualified in accordance with S9074-AQ-GIB-010/248 OR approved in accordance with the procedures outlined in ABS Guide for Bronze and Stainless Steel Propeller Castings (dated 2008), paragraph 3.7.2.

3.8.1 No weld repair is authorized unless prior approval is received from the Contracting Officer.

3.8.2 Welding on the pressure face of any propeller casting in the critical area shall not be undertaken without prior approval of the Contracting Officer.

• a The critical area is described as the pressure face of the blades between the fillet and the .4 radius and starting at the leading edge encompassing 80% of the chord length taken at the 0.4 radius. (Reference Figure 1 of DOD-STD-2185(SH).

• b Welding repairs of propeller castings shall meet the requirements of DOD-STD-2185(SH) or ABS Part 7 Section 10 entitled Guide for Bronze and Stainless Steel Propeller Castings (dated 2008).

3.9 Surface finish. Surfaces of the propeller blades and hub shall be ground fair and polished in accordance with SAE-J-448 to meet the following requirements:

3.9.1 Propeller blade surfaces - 63 micro inches or better.

3.9.2 Propeller Hub - 125 micro inches or better.

3.10 Surface inspections.

3.10.1 A visual inspection shall be performed on all exterior blade surfaces in accordance with MIL-STD-2035(SH), section 4.

• a All visual defects, even though deemed acceptable, shall be documented on the inspection report.

3.10.2 The Contractor shall perform a dye penetrant inspection over 100 percent of the blade surfaces including the hub in accordance with T9074-AS-GIB-010/271. The acceptance criteria of MIL-STD-2035(SH) Table IV (Appendix 1 of this specification) shall be used for evaluations.

3.10.3 The Contractor shall document all propeller defects resulting from the visual and dye penetrant inspections. These defects shall be indicated by type and size on visual inspection sheets. Each propeller will require individual inspection sheets for the pressure face of the blades, suction face of the blades, the fillet, and the hub.

3.11 Test and inspection data requirements, final inspection report. The Contractor shall perform final dimensional, balancing, visual, and dye penetrant surface inspections for each propeller manufactured and record this data on a final inspection report. This report shall accurately reflect the final condition of each propeller.

3.11.1 The final inspection report shall contain, at a minimum, the following data:

• a Propeller blade radius.

• b Pitch at the 0.3 through 0.95 radii.

• c Average pitch of each blade at the 0.3 through 0.95 radii.

• d Blade section half widths at the 0.3 through 0.95 radii.

• e Thickness at every 10 percent station for each blade section from the 0.3 through 0.95 radii.

• f Leading and trailing edge profiles at the 0.3 through 0.95 radius.

• g Rake

• h Track

• i Angular spacing of blade center axes.

• j Fairing rod clearances

• k All propeller hub dimensions including taper and keyway

• l Surface finish of blade and hub areas

• m Surface inspection (visual and 100 percent dye penetrant)

• n Material composition

• o Balancing Data

3.11.2 The Final Inspection Report shall be submitted to the Contracting Officer for review. If this report is determined to be acceptable, the Contracting Officer will authorize ELC’s Quality Assurance Branch to schedule final inspections/tests outlined in section 4.4. of this specification.

3.12 Propeller stamping. Each propeller shall be stamped on the suction side of the blade palm, clear of the fillets with the information stated on DWG 140 WTGB-245-2’s General Note 6.

3.12.1 The stampings shall be at least 1/4 to 1/2" high, neat, legible, and visible when the propeller is fully assembled.

3.13 Notifications & inspections. The contractor shall be responsible for notifying the Contracting Officer in writing no less than seven (7) calendar days prior to the contractor being ready for any Quality Assurance (Q.A.) inspections or testing required herein.

3.14 Balancing

3.14.1 STATIC (Single Plane)

3.14.1.1 Each propeller shall be single plane balanced as stated herein. All balancing shall be accomplished by means of balancing equipment, which requires rotation of the work piece. The residual unbalance in each plane of correction shall not exceed the value determined by calculating the following formula: U = 4000W/N2 where:

U = Maximum allowable residual unbalance in oz.- inches.

W = Weight of rotating part in pounds.

N = Maximum operating speed of unit. (305 RPM)

3.14.1.1.1 Prior to performing any balance tests, the Contractor shall demonstrate the sensitivity of the balance machine using a weight determined from the following formula: Ws = 0.1(U)/r where:

Ws = Sensitivity Weight

U = Propeller residual unbalance tolerance

R = Radial location of the weight

3.14.1.1.2 The addition of this weight shall be easily detected and discernible to the balance machine operator.

3.14.1.2 The mandrel or concentric rings used to support the propeller during balancing shall not exceed a total indicated run-out (TIR) of .001 inches.

3.14.1.3 Material removed to effect balancing shall be taken from the suction face of the heavy blade. Care shall be taken to keep a fair surface.

The area from which metal is taken shall not come within 10 percent of the chord length to the leading or trailing edges. Coordinate material removal between static and dynamic efforts, if prudent wait for more sensitive dynamic balancing data to be produced before material removal.

3.14.1.4 The actual amount of unbalance for each propeller shall be documented (initial and after any balancing efforts) on each Final Inspection Report.

3.14.2. DYNAMIC (Two Plane)

3.14.2.1 Upon completion of satisfactory static balancing, Contractor shall perform dynamic balancing of the propeller. Vessels have encountered unacceptable levels of vibration attributed to propellers. To improve confidence that balance is optimal, a decision has been made to obtain dynamic balancing. Research has shown modern advancements in computer assisted balancing machines have made dynamic balancing of propellers available.

3.14.2.2 Contractor shall use dynamic balancing equipment, and proprietary software, to (a) validate static balance data (b) obtain a further improved state of balance achievable for the propeller at hand. ISO 1940 G2.5 balance tolerance shall be sought, if not obtained Contractor shall provide specific reasons for failure.

3.14.2.3 The results of dynamic balancing shall be documented including any computer printouts available (initial and after any balancing efforts) on each Final Inspection Report.

4.0. QUALITY ASSURANCE

4.1 General. The contractor shall maintain an inspection system which shall insure that each item offered to the Coast Guard for acceptance or approval conforms to the contract requirements. The inspection system shall be documented and meet the requirements of ISO 9001 and available for review by the Coast Guard.

4.2 Records. The contractor shall maintain records of all inspections and tests. The records at a minimum shall indicate the nature and number of observations made, the number and type of deficiencies found, and the corrective action taken.

4.3 Calibration system. The contractor as well as any subcontractors shall be required to maintain a test equipment calibration program in compliance with ASQ/ISO/IEC 17025. The program shall be documented and traceable to the National Institute of Standards (NIST).

4.4 Responsibility for inspection. The contractor shall be responsible for the performance of all inspection requirements specified herein. The Contractor shall provide space, personnel and test equipment for the conduct of all inspection requirements. All inspection and testing shall be performed at the contractors facility prior to the Coast Guards acceptance. The Coast Guard reserves the right to verify or have performed any of the inspections set forth herein where such inspections are deemed necessary to assure that supplies and services conform to prescribed requirements. The contractor shall notify the scheduled commencement of any inspections required by this specification.

4.5 Responsibility for compliance. All items shall meet the provisions of sections 3 & 5. The inspections set forth in this specification shall become part of the contractor’s overall inspection system or quality program. The absence of any inspection requirements in the specification shall not relieve the contractor of the responsibility of assuring that all products or supplies submitted to the government for acceptance comply with all requirements of the contract. Sampling for quality conformance does not authorize submission of known defective material (either indicated or actual) nor does it commit the government to acceptance of defective material.

4.6 Inspections and tests. The inspections/tests required here and in the appropriate subsection in section 3 are the minimum required and are not intended to supplant any controls, examination, inspections or tests normally employed by the contractor to assure the quality of the item in question. The following tests and inspections will be witnessed by an SFLC Quality Assurance Representative:

4.6.1 Dimensional inspection. See section 3.6 and 3.7.

4.6.2 Surface inspections. See section 3.10.

4.6.3 Balancing inspection. See section 3.14.

4.6.4 Stamping inspection. See section 3.12.

4.6.5 Packaging, packing and marking inspection. See section 5.

4.7 Failure responsibility. If the specified item fails to pass any inspection/test the contractor shall report the failure and the recommended fix to the Contracting Officer. If approved, the corrective action on the materials or processes shall be taken in accordance with this section.

• The Contracting Officer reserves the right to totally reject any failed item without considering any suggested corrective action.

• The inspection/testing shall be discontinued until all corrective action has been taken.

• After all corrective actions have been taken the inspection/tests shall be continued or repeated at the option of the Contracting Officer.

• Acceptance shall be withheld until re-inspection has been shown that the corrective action was successful and the item satisfactorily passes all inspections and tests.

• All corrective actions shall be documented as part of the contractor’s inspection system and submitted for approval to the Contracting

Officer.

• Each corrective action report shall include, but not be limited to the cause of each defect, corrective action suggested, and the steps taken to prevent a recurrence of each defect.

4.8 Test & inspection reports. One copy of any required inspection, test or tolerance check done on each delivery order shall be sent to the Contracting Officer for review and approval prior to authorization of Quality Insurance Inspection.

4.8.1 Quality assurance representative. A copy of any test, inspection or tolerance report shall be turned over to the Quality Assurance Representative upon arrival at the contractor’s plant.

4.9 Packing inspection. The Contracting Officer shall be notified prior to the packaging and marking of the completed units in accordance with section 5.2 of this specification.

5. PRESERVATION, PACKING, MARKING, AND SHIPPING

5.1 Preservation.

5.1.1 Prior to preservation, each propeller shall be cleaned by any process or combination of processes, which will accomplish thorough cleaning without damage to the propeller.

5.1.2 After cleaning, tape conforming to SAE AMS-T-22085 and strippable compound preservative shall be applied to each propeller in accordance with MIL-DTL-2845E, paragraph 3.14.1.3.

5.1.3 After the application of strippable compound, galvanized sheet metal blade edge protectors, utilizing corrosion resistant hardware, shall be installed in accordance with MIL-DTL-2845E paragraph 3.14.1.4.

5.2 Packing.

5.2.1 Each propeller shall be individually packed in accordance with MIL-DTL-2845E paragraph 3.14.2.2.2.

5.3 Marking. Each packaged crate/box shall have a water proof label securely attached or water proof stencil in the upper left-hand corner of the two longest sides (two opposite sides if square) of each box IAW MIL-STD-129R. The stencil marking shall be 3/4" -1" inch in height.

5.3.1 Marking layout.

5.3.1 See below for marking layout.

• Type 1 - PROPELLER, RIGHT HAND (RH)

• STOCK NUMBER: 2010-01-078-8216

• ITEM NAME: PROPELLER, RH

• PART NUMBER: 140 WTGB-245-2

• SERIAL NUMBER: As stamped on hub

• CONTRACT NUMBER: As indicated on contract

• DELIVERY ORDER NUMBER: As indicated on contract

• SHIPPING WEIGHT: As Determined by Contractor

• CONDITION CODE: CONDITION A

• QUANTITY & UNIT OF ISSUE: 1- EA

• COAST GUARD SFLC MATERIAL

• REUSABLE CONTAINER DO NOT DESTROY

5.3.2 Bar coding. U.S. Coast Guard requires bar coding of the NSN, IAW ISO/IEC 16388-2007 Code 39 Symbology.

5.3.2.1 The Bar Code Label can be applied separately or as part of the marking required in 5.3.

5.4 Shipping. The Contractor shall ship, and deliver the parts and components to the government address specified in paragraph 5.4.1. Notify the Contracting Officer Representative (COR) and Contracting Officer about the shipment 7 days in advance. Provide timely shipping information to COR including the name of the shipping company, date of shipment leaving Contractor’s facility, and expecting arrival date and time at the government facility. No shipment shall arrive outside of government normal business hours as determined by the Contracting Officer.

5.4.1 Address. Unless otherwise specified, the Contractor shall ship, and deliver all parts to the following government addresses:

• U.S. Coast Guard

• Surface Forces Logistics Center

• 2401 Hawkins Point Rd. Bldg. 88

• Baltimore, MD 21226

6 NOTES

6.1 Document sources.

6.1.1 Government document sources.

• Department of Defense Single Stock Point (DODSSP)

Building 4, Section D 700 Robbins Avenue Philadelphia, PA 19111-5094 215-697-2667/2179

FAX 215-697-1462

• DOD & Navy Publications & Forms (Other Than DODSSP) Naval Publication and Forms Center 5801 Tabor Ave.

Philadelphia, PA 19120 215-697-2000

6.1.2 Coast Guard document sources.

• USCG Surface Forces Logistics Center 2401 Hawkins Point Road Baltimore, MD. 21226-5000 Phone: 410-762-6171 ATTN: Contracting Branch, CPD1

6.1.3 Commercial document sources.

• Society of Automotive Engineers Inc. (SAE)

400 Commonwealth Drive Warrendale, PA 15096 1-877-606-7323

FAX: 1-724-776-0790

• American Society for Testing & Materials (ASTM) 100 Barr Harbor Drive West Conshohocken, PA 19428 610-832-9500

FAX: 610-832-9555

• American Society for Quality Control (ASQC) 611 East Wisconsin Ave.

Milwaukee, WI 53202 414-272-8575

FAX: 414-272-1734

• International Standard Organization (ISO) 1, ch. De la Voie-Creuse CP 56 – CH-1211 Geneva 20 Switzerland Phone +41 22 749 01 11 Fax: +41 22 733 34 30

TABLE IV. Acceptance standards for inspection of bronze propellers.9

Location of discontinuities

Type of discontinuities2

Maximum acceptable discontinuity size (inches)1,3

Discontinuity acceptance standards

Allowable areas of concentration 6 x 6 Area of concentration6,7 Maximum No.8,9

Maximum spacing between aligned discontinuities 4,5

CASTINGS

A band located around the periphery of each blade on both the pressure and suction faces with a width equal to 10 percent of the width of the blade measured at the 0.

radius, but not to exceed 6-inches; and an area mea-sured from (and including) the hub fillet to 0.4 radius on the pressure face only.

Non-linear 1/8

20 D

5 percent of propeller surface area with distribution limited by a maximum of 5 percent for each blade surface.

Linear 1/8 6 4D

The remaining surfaces of the blades.

Non-linear 1/8 20

D

Linear 1/4 8 4D Hub outside diameter (OD)

Non-linear 1/4 15 D Linear 3/8 6 4D or 1-inch, whichever is less

WELDMENTS

Al! surfaces

Non-linear 1/16 12 4D 5 percent of total weld area.

Linear 0 0 --

See footnotes on following page.

APPENDIX 1 (Page 1 of 2)

TABLE IV FOOTNOTES

1. Liquid penetrant inspection shall be performed as an aid to visual inspection in locating discontinuities. Only discontinuity size shall be used as a basis for rejection.

2. A linear discontinuity is one in which the length is greater than or equal to three times the width.

3. Any linear discontinuity over 1/16 inch in length located within a peripheral band 1 inch wide;

and whose major dimension is oriented normal to the blade edge shall be repaired.

4. Maximum spacing is the distance separating two adjacent discontinuities in terms of the major dimension of the larger discontinuity (D). Aligned non-linear discontinuities shall consist of four or more discontinuities in a line. Aligned linear discontinuities shall consist of two or more discontinuities whose major dimensions are oriented in a line. However, when the total length of the aligned discontinuities does not exceed the maximum length permitted for a single discontinuity, these aligned discontinuities shall be considered as one discontinuity, and shall not be cause for rejection.

5. When the major dimension of clustered discontinuities does not exceed the maximum size permitted for a single discontinuity, these clustered discontinuities shall be considered as one discontinuity and shall not be cause for rejection. Scattered discontinuities, separated from the cluster by 1/8 inch or more shall not be considered as part of the cluster..

6. Randomly dispersed casting discontinuities whose major dimensions are 1/16 inch or less shall not be counted in determining total number of discontinuities within an area of concentration.

7. More than six discontinuities whose major dimensions are greater than 3/32 inch in any 6 by 6-inch area of the propeller surface constitute an area of concentration. Each area of concentration shall be separated from an adjacent area of concentration by a minimum of 18 inches.

8. The total number of non-linear discontinuities may be increased to the combined total, or part thereof, represented by the absence of linear discontinuities.

9. For used propellers not originally inspected to the requirements of this standard, the allowable number of discontinuities in each area of concentration may be increased 15 percent for each blade surface, and the minimum spacing between adjacent aligned linear discontinuities may be reduced to 2D provided that: (a) the discontinuities do not exceed the limits of any other requirement of this standard, and (b) the discontinuities have shown no deleterious effects in service.

APPENDIX 1 (Page 2 of 2)

PROPELLER REPAIR TOLERANCES

140 WTGB PROPELLERS

ISO 484/1 CLASS I

REPAIR TOLERANCES

MEAN PITCH OF EACH RADIUS OF EACH BLADE = +/- 1.5% of design with a minimum of 0.394”

DESIGN MAX MIN

0.3R 60.094 60.995 59.193 0.4R 68.937 69.971 67.903 0.5R 72.213 73.296 71.298 0.6R 71.500 72.573 70.428 0.7R 72.947 74.041 71.853 0.8R 75.435 76.567 73.303 0.9R 75.115 76.242 73.988 0.95R 74.836 75.956 73.713

MEAN PITCH PER BLADE = +/- 1.0% of design with a minimum of 0.296”

DESIGN MAX MIN

71.385 72.099 70.671

MEAN PITCH FOR PROPELLER = +/- 0.75% with a minimum of 0.197”

DESIGN MAX MIN

71.385 71.920 70.850

TRACK = +/- 1% of propeller design diameter

Tolerance band = 2.04” max

APPENDIX 2 (Page 1 of 3)

BLADE THICKNESS = Plus tolerance is +2.5% of PMT with a minimum of .0394”/Negative tolerance is -1.5% of PMT with a minimum of -0.0394”

DESIGN MAX MIN

0.3R 5.039 5.165 4.963

0.4R 4.366 4.475 4.301

0.5R 3.711 3.804 3.655

0.6R 3.082 3.159 3.036

0.7R 2.489 2.551 2.452

0.8R 1.909 1.957 1.870*

0.9R 1.356 1.395* 1.317*

0.95R 1.015 1.054* 0.976*

*Minimum tolerance applies

BLADE WIDTH = +/- 2% of value derived from diameter (102”) divided by number of blades (4) with a minimum of 0.276”

DESIGN HIGH LOW

0.4R 38.621 39.131 38.111

0.5R 40.638 41.148 40.128

0.6R 41.345 41.855 40.835

0.7R 40.540 41.050 40.030

0.8R 37.532 38.042 37.022

0.9R 30.360 30.870 29.850

0.95R 23.915 24.425 23.405

APPENDIX 2 (Page 2 of 3)

NOTE: A minimum of 4 radii must be measured as agreed between USCG/Contractor

ANGULAR SPACING OF BLADE CENTER AXIS = +/- 1 degree

90 91 89

BALANCE TOLERANCE – 275.19 OZ IN

PROPELLER RADIUS - +/- 0.3% OF DESIGN

51.000 51.510 50.490

BORE LARGE END DIAMETER - 12.350" (note this measurement before the corner is rounded over)

CALCULATED SMALL END DIAMETER - 10.630" (1:12 taper over 20.6356” taper length)

KEYWAY WIDTH - 2.5590"

KEYWAY DEPTH - 0.5512"

APPENDIX 2 (Page 3 of 3)

WORK ITEM 1: 2010-01-078-8216, Propeller, Fabrication