1. Oxidizer Tank and Delivery Team
Concept Review
Oxidizer Tank and Delivery Team

2. Introductions Nathan Confer Tim Seibert Maggie Anderson Tony Nimeh
Chris Wergin

3. Benchmarking Chalice Design Embedded Design
After investigating the previous team’s work and looking into other hybrid rocket designs it became obvious that the project has three major components. These components are the fuselage, the tank, and the oxidizer delivery system.

4. Needs Ranking Tank Importance N20 tank needs to sustain TBD pressure 9
incorporate safeguards with respect to burst pressure 3
Oxidizer Delivery System
Controllable (steady) flow rate
Safe fuel delivery system
Tank refilling mechanism
Fuselage
Accept and support delivery system, tank, motor
Withstand heat transfer from combustion and tank
Accommodate payload integration
Power source
Recovery system 1

5. Maggie Anderson (focal)
Team Organization
Project Manager
Nathan Confer
Technical Lead
Tony Nimeh
Frame
Tony Nimeh (focal)
Maggie Anderson
Tim Seibert
Oxidizer Tank
Chris Wergin (focal)
Nathan Confer
Tony Nimeh
Delivery System
Maggie Anderson (focal)
Chris Wergin
Tony Nimeh
Fuselage
Tim Seibert (focal)
Nathan Confer
Shell
-necessity exploration (pending)
-material considerations
Attachment Mechanisms
-test stand setup
-future payload provisions
Super Structure
-assembly rods
-support plates
Sub Structure
-injector plate connection
-payload platform
Tank Design
-sizing dimensions
-material considerations
Manufacturing
-composite capabilities
Components
-piping
-valves
-pressure regulators
Safety
-burst prevention

6. Concept Sketches

7. Concept Breakdown Frame Oxidizer Delivery System Tank Fuselage
Tony Nimeh
Oxidizer Delivery System
Maggie Anderson
Tank
Chris Wergin
Fuselage
Tim Seibert

8. Skeleton Structure Three hollow rings to support the oxidizer tank
Two clamp rings to hug the tank and fasten it to hollow rings
Four threaded rods run axially to unify structure
Two support plates align and constrain the feed system to reduce bending stress
Aft of the support plates will be the Injector Plate and Motor with attachment TBD
Clamp Ring
Support Ring

9. Structure Needs Lightweight Transfer and withstand thrust
Remove material wherever possible (hollow, thin, etc.)
Transfer and withstand thrust
Axially strong
Accommodate payload and electronics
Versatile foundation for future expansion

10. Feed System Background
What is the feed system’s function?
To deliver the oxidizer from the tank to the combustion chamber safely and with a controllable pressure loss
What causes pressure losses?
Leaking
Viscous effects
Geometry/Direction changes
Monitoring/Flow Control Devices

11. Ground Testing Feed System
P06006
P07105
Brass + teflon tape to stainless steel
Heating blanket for tank
Tube in tank to siphon liquid
Mass flow meter not implemented

12. Oxidizer Feed System

13. Same Feed System Losses due to geometry/monitoring/leaking
Improvements to ground testing feed system
More hose (reduce geometry and leaking losses)
Redundant ball valve
Move needle and check valve

14. Tank Concept

15. NOX Tank Concepts Aluminum Tank Composite Tank
Pros: low cost, easily fabricated, high psi rating
Cons: weight
Composite Tank
Pros: low weight, high psi rating
Cons: costly, difficult to fabricate in-house
Prefab Paintball Composite Tank
Pros: high psi rating, low cost, low weight (per tank)
Cons: low CI per tank, weight (given # of tanks needed)

16. Tank Fabrication Issues (composite)
In-house fabrication
Limited method of production
hand lay-up
composite sock
lathe winding
Cost of materials / shelf life of materials
Time
Outsourcing fabrication
Finding companies to fabricate custom tank
Cost

17. Fuselage Titanium construction
Two halves connected to inner support structure
Hatch to provide access to fuel delivery system 17

18. Vertical Test Stand Mount
Attach to payload receptacle at top of rocket
Bracing to run along side of fuselage and attach to bottom of vertical test stand
Design Difficulties
Method of connection to internal support structure
Ease of access to internal components
Thermal expansion and thermal shock

19. Pugh Matrices
Tank
Oxidizer Delivery System
Fuselage
Assembly

20. PUGH Matrix for Tank Concept A: Aluminum Concept B:
Hand Lay Up Composite
Concept C:
Outsourced Composite
Concept D:
Paintball Tank
Selection Criteria
Weight
Rating
Weighted Score
Ease of Machining
0.15 4
0.60 3
0.45 5
0.75
Ease of Use
0.10
0.40
Reusability
Durability
0.20 2
Safety
0.80 1
Total Score
2.80
2.85
3.75
3.90

21. PUGH Matrix for Oxidizer Delivery System
Concept A:
Maggie's system
Concept B:
(Nate, Chris, Tim, Tony)'s system
Selection Criteria
Weight
Rating
Weighted Score
Ease of Machining
0.05 3
0.15 4
0.20
Ease of Use
0.45
0.60
Durability 5
1.00
Safety
Reusability
0.10
0.50
Functionality
0.75 2
0.30
Total Score
4.15
3.95

22. PUGH Matrix for Fuselage
Concept A:
Two Halves
Concept B:
Two Halves with access door
Concept C:
Slip Cover
Concept D:
No Shell
Selection Criteria
Weight
Rating
Weighted Score
Ease of Machining
0.15 3
0.45 2
0.30 4
0.60 5
0.75
Ease of Use
0.20
0.80
1.00
0.40
Durability 1
Safety
0.90
1.50
Total Score
3.55
2.95
3.30
3.60

23. PUGH Matrix for Rocket Assembly
Concept A:
BAMF
(Housing for tank/Brackets)
Concept B:
Rods and plates
“in rods we trust”
Concept C:
Annular
Concept D:
Multiple oxidizer tanks
Selection Criteria
Weight
Rating
Weighted Score
Ease of Machining
0.05 3
0.15 4
0.20 1 2
0.10
Ease of Use
0.30
0.60
Reusability
0.80
Durability
0.40
Safety
Functionality
0.45
Total Score
3.00
4.00
2.50
2.45

24. Concept Selection

25. Senior Design I Outlook
Week 8
Finalized concept
Detailed concept sketches (CAD)
Rough sizing of all components
Material selections of components
Part supply information for multiple subfunctions for Bill of Materials
Provide detailed information to manufacturing limits and difficulties for all subfunctions
Establish rough Senior Design II schedule with regard to project milestones (manufacturing, testing, etc)

26. Senior Design I Outlook
Week 10
Finalized sizing of all components
Detailed sketches (CAD) with finalized subfunction sizes
Finalized material selections
Completed Bill of Materials for all subfunctions and assemblies
Order necessary parts and raw material
Manufacturing process finalized
Senior Design II schedule established with respect to parts delivery, manufacturing lead times, and testing milestones

27. Senior Design II Outlook
Review finalized design, milestones, and lessons learned from SDI
Establish part delivery dates
Resolve any shipping delays or unexpected setbacks during transition from SDI to SDII
Finalize manufacturing schedule
Setup manufacturing and assembly completion date(s)
Correlate with P08105 for date to assemble entire rocket (tank with engine)
Test entire rocket assembly
Write up design, manufacturing, and testing, reports and conclusions (and poster)

28. questions comments concerns

29. thank you