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Evaluating Propeller Cuts Using Photographs of Marine Mammal Carcasses and Living Animals James L. Wood Lumatrex, Inc. Evaluating Propeller.

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Presentation on theme: "Evaluating Propeller Cuts Using Photographs of Marine Mammal Carcasses and Living Animals James L. Wood Lumatrex, Inc. Evaluating Propeller."— Presentation transcript:

1 Evaluating Propeller Cuts Using Photographs of Marine Mammal Carcasses and Living Animals James L. Wood Lumatrex, Inc. Evaluating Propeller Cuts 1

2 Goals For These Methods Use Photographs of Propeller Cuts Suitable For Carcasses and Living Animals Suitable For Any Size Propeller 2

3 Current Status Research and Development Phase Is Complete Two Test Cases Have Been Evaluated Proposal Requesting Grants For Preparing A Technical Report Has Been Prepared 3

4 Test Cases Right Whale Necropsy – RKB-1424 Uses photographs taken during the necropsy Right Whale #2425 – Live Individual Uses photographs of living adult animal 4

5 Right Whale Necropsy RKB Calf Length – 581 cm (19 feet) Approximate Weight – 4500 lbs Adult right whale was also present Struck by USCG Cutter Point Francis January 5, 1993 Reported by Commanding Officer 5

6 Original Necropsy Drawings 6

7 RKB-1424 Necropsy Photo Cut Series I 7

8 Evaluation Results - Cut Series I Created by the USCG Cutter Point Francis (WPB 82356) Propeller Diameter – cm (45 inches) Propeller Blades – 5 Propeller Rotation – Clockwise (CW) Advance Coefficient – 0.65 Propeller Pitch - > 29 inches Vessel’s Approach – from directly ahead of whale First Propeller Strike – Cut #18 Initial Speed of Whale – 4.8 knots Maximum Speed of Whale – 6.6 knots (Cut #11) Final Speed of Whale – 0 knots 8

9 Changes in Speed of Whale 9

10 Known Details - Vessel USCG Cutter Point Francis (WPB 82356) Length – 82 feet Weight – 67 gross tons Twin Screws Propeller Diameter feet (42 inches) Propeller Blades – 5 Propeller Pitch – unknown Average Speed of Vessel 14.2 knots Rotation Speed of Prop – 600 srpm (Turns for 15 knots) Advance 14.2 knots and 600 srpm –

11 RKB-1424 Photo Cut Series II 11

12 Right Whale 2425 Adult about 11 years old Estimated Fluke Width – 440 cm Struck off Cumberland Island, Georgia March 10, 2005 Reported by Vessel’s Operator 12

13 Right Whale 2425 Prop Cuts Wildlife Trust/Georgia DNR 13

14 Prop Cut Series I on Left Fluke New England Aquarium 14

15 Prop Cut Series I on Left Fluke New England Aquarium 15

16 Evaluation Results - Cut Series I Propeller Diameter – 64 cm (25 inches) Propeller Blades – 4 Propeller Rotation – Counter Clockwise Vessel Advance Coefficient – 1.05 Propeller Pitch - > 27 inches 16

17 Prop Cut Series II Wildlife Trust/Georgia DNR17

18 Evaluation Results - Cut Series II Propeller Diameter – 72 cm (28 inches) or 63 cm (25 inches) Propeller Blades – 4 Propeller Rotation –Clockwise Vessel Advance Coefficient – 0.80 or 0.90 Propeller Pitch - > 23 inches 18

19 Evaluation Results - Combined Propeller Diameter – 66 cm (26 inches) Propeller Blades – 4 Propeller Pitch - > 25 in. (Prop Advance – 25 in.) Vessel Advance Coefficient – 0.92 Vessel’s Length – 40 to 50 feet Vessel’s Beam – Approx. 13 feet Vessel’s Approach – from right rear of whale Whale’s Fluke Width – 494 cm 19

20 Vessel Allegedly Involved 20

21 500 hp Cut Span 21

22 500 hp Advance Coefficient 22

23 500 hp Slip 23

24 Vessel Details Sabreline 42 Express Cruiser Length – 42’ 3” Beam – 14’ 4” Weight – 29,000 lbs. Twin Screws Propeller Diameter - 26 inches Propeller Blades – 4 Propeller Pitch – 35 inches (Prop Advance – 24.5 inches) Gear Ratio – 2.227:1 Engine 20 Knots – 2227 rpm Propeller 20 Knots – 1000 rpm Advance 20 knots –

25 Goals Achieved Uses Photographs of Propeller Cuts Suitable for Carcasses and Living Animals Suitable for Any Size Propeller 25

26 Future Actions Prepare a technical report documenting these methods Have technical report peer reviewed and published Develop computer software to automate the calculations included in these methods 26

27 Right Whale Necropsy – RKB-1424 Right Whale #2425 – Live Individual Proposal for Technical Report James L. Wood


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