This document provides information about a project to optimize the design of a Jetovator product. It includes: - An introduction with names of team members and sponsor Jetavation Inc. - Background on the current problem and need for a solution to improve performance and satisfy customers. - Main components and specifications for the Jetovator. - Details of two proposed design solutions, fabrication process, and testing apparatus. - Test results showing a 24.2% increase in thrust for one design but not meeting the 10% target. - Reflections on challenges and potential for future work. - Budget information and acknowledgements.

2. Introduction
Josh Blau
Mechanical
Camron Blonigan
Mechanical
Lance Hartland
Mechanical
Budget Analyst
Curtis Harwood
Mechanical
Mayra Melgoza
Civil/Mechanical
Project Manager
Greg Watkins, PH.D.,
PE
Faculty Advisor
Robert Innes (Owner)
Jetavation Inc.
Sponsor

3. Sponsor
 Jetavation, Inc.
 Location: Redding, California USA
 Owner: Robert Innes
 Started in March of 2012

4. Background
 Current problem: Current design has inefficiencies and our
sponsor wants optimization of the product.
 Need for a solution:
1. To maintain relevancy in a competitive market
2. Satisfy customer base

5. Main Components of
Jetovator
Thrust Adapter
Backbon
e
Fire Hose
Plastic
Body

6. Specifications
Requireme
nt
Engineering
Specificatio
n
Metric
Method/D
evice
Condition Target
Improve
Performanc
e
Thrust
Pounds
Force
Pneumati
c Cylinder
Apparatus
Near Maximum
RPM (~7200)
10%
Increase
Quantitative Requirement:
Qualitative Requirements:
 MUST create a Detailed flow analysis of Jetovator and its components
 Plastic body MUST fit on the backbone
 MUST not modify the Personal Water Craft
 Thrust adaptor SHOULD include steering and should be single-tubed
 Redesigning control handles to prevent leaking WOULD BE NICE

7. Final Budget
1.5% 0.7%
4.9%
92.6%
0.3%
Total cost = $40,435.24
Sources of funding: Jetavation, Inc.

8. Final Budget Excluding
Labor
21%
9%
65%
5%
Total cost = $3,008.29

9. Design Solution: Focus

10. Design Solution 1
 Design similar to
Original Thrust Adapter
 Lengthened Cone to
12”
 Shifted Location of
Steering Exit

11. Design Solution 2
 Rectangular Design
 Similar to Defy adapter
 Longer transitions
 Features steering

12. Fabrication: Thrust
Adaptors
 Jetavation’s fabrication
team utilized
 Able to create Design
Solution 1
 Casting Design Solution
2 was too expensive
Design Solution 1 mounted

13. Fabrication: Testing
Apparatus
 Aluminum Extrusion
Frame
 Ease of adjustment

14. Pneumatic Cylinder
Design
 Pneumatic Cylinders used
to compare force (thrust)
of different systems
 Force of Cylinder
 F = P*A
 P = Gauge Pressure
(lb/in^2)
 A = Cross-sectional area
of cylinder (in^2)
 Pre-pressurize cylinder

15. Testing
 Location: Lake Shasta
 Access to private dock

16. Testing

17. Results
 Did not meet specification of a 10% increase
Original Design Solution Extended Original Defy
690.5 696.5 735.4 857.9
0.90% 6.5% 24.20%

18. Reflection
 Problems Encountered
 Travel to Test/Scheduling
 Funding Limitations
 Choice to Modify only Thrust
Adapter
 Merit of Design Solutions
 Outlet Nozzle changes
improved performance
 Design Solution 2
 Phase II
 Hose Length/Size
 Modify Body

19. Reflection Cont.
 System going Forward
 Modify Defy’s rectangular duct
 Include straight pipe under PWC
 Additional Length to hose

20. Conclusion
 Acknowledgements
 Rob Innes (Sponsor)
 Joe and Joey Natale (Testing Days)
 Keith & Jetavation’s Manufacturing Dept.
 Dr. Watkins (Advisor)
 Dr. Scolaro and Dr. Mehl (Fluids
Expertise)

21. QUESTIONS?

22. Component Description Material Part # Quantity Vendor Cost Ordered Y/N Received Y/N
Bracket, 2" Long for 2" High Double/Quad Profile Aluminum 47065T253 14 McMaster-Carr 123.06 Y Y
Tee, 4" Long for 2" High Double/Quad Profile Aluminum 47065T281 1 McMaster-Carr 23.84 Y Y
Plate, 4" Long for 1" High Single Profile Aluminum 47065T259 24 McMaster-Carr 161.76 Y Y
Brace, 18" Long for 1" High Single Profile
Aluminum 47065T701 2 McMaster-Carr 37.34 Y Y
90 Degree Plate, 4" Long for 2" High Double/Quad Aluminum 47065T274 4 McMaster-Carr 65.64 Y Y
T-Slot Extrusion, Double Profile, 1" X 2" Size, 4' Long
Aluminum
47065T107
10 McMaster-Carr 229.80 Y Y
Brace, 12" Long for 1" High Single Profile Aluminum
47065T188
6 McMaster-Carr 102.90 Y Y
Bracket, 1" Long for 2" High Double/Quad Profile Aluminum 47065T237 4 McMaster-Carr 33.88 Y Y
Pitot Tube Composite A-PHG-160K 1 Underhill 45.57 Y Y
Pressure Gauge Composite PP200G 4 Lowe's 47.21 Y Y
Paracord Nylon 52692 1 Home Depot 4.18 Y Y
Digital guage, 300 PSI Composite 2798K23 3 McMaster-Carr 277.80 Y Y
Front Flange for 3-1/4" Bore, Tie Rod Air Cylinder Composite 6211K4 1 McMaster-Carr 40.00 Y Y
Bracket, 2" Long for 1" High Single Profile Aluminum 47065T239 6 McMaster-Carr 35.10 Y Y
NFPA Tie Rod Air Cylinder, 2" Bore Size, 2-1/2" WD Composite 6211K161 2 McMaster-Carr 313.00 Y Y
Lightweight Air Hose, 1/4 NPT Male X 1/4 NPT Female Rubber 54075K49 2 McMaster-Carr 15.18 Y Y
Perpendicular Pivot for 1-1/2" Single Profile Aluminum 47065T14 1 McMaster-Carr 18.43 Y Y
Lightweight Air Hose, 1/2 NPT Male X Easy-Install Rubber 54075K55 1 McMaster-Carr 14.44 Y Y
NFPA Tie Rod Air Cylinder, Double Acting, 3-1/4" Bore Composite 6211K258 1 McMaster-Carr 204.17 Y Y
Inline/Perpendicular Pivot for 2" HT Double/Quad Aluminum 47065T192 1 McMaster-Carr 22.25 Y Y
5/16" X 1" Hex Bolt Steel 5161H 8 Collier Hardware 0.88 Y Y
3/4" Hex Nut Zinc 34T-4955 1 Collier Hardware 0.55 Y Y
7/16" Hex Nut Zinc 716T-4955 2 Collier Hardware 0.26 Y Y
3/8" X 4" Plate Carbon Steel ------------- 1 Pollak Steel Supply 5.55 Y Y
3/8" X 5" Plate Carbon Steel ------------- 1 Pollak Steel Supply 4.63 Y Y
1/8" X 10" Plate Carbon Steel ------------- 1 Pollak Steel Supply 6.55 Y Y
1/4-Inch NPT Tank Valve Plastic ------------- 1 Milton Industries 8.33 Y Y
Pipe Fitting, Forged Street Tee, 1/2-Inch Female Pipe Brass ------------- 1 Anderson Metals 11.79 Y Y
Pipe Seal Tape ------------- 78864178500 1 Home Depot 1.27 Y Y
1/4" Hex Nipple LF ------------- 42805446355 2 Home Depot 5.44 Y Y
1/4" Pipe Tee LF Brass 42805446362 2 Home Depot 15.74 Y Y
Hex Pipe Bushing 1/2" X 1/4" MIP X FIP Brass 42805446775 2 Home Depot 8.36 Y Y
1/4" X 25" Air Hose Polyurethane 87817006722 3 Home Depot 59.94 Y Y
D Batteries ------------- ------------- 3 Sportsmans Express 21.07 Y Y

23. Concept #1

24. Concept #2

25. Engineering Analysis
 Bernoulli's Equation

26. CFD Parameters

27. Backbone
62.67%
18.97%
18.36%

28. Thrust Adapter

29. Design Solution
Compared to Original:
Original:
31% to Steering
Winning Design:
19.12% to Steering

30. Secondary Design
Solution
Compared to Original:
Original:
31% to Steering
Secondary Design:
18% to Steering