Recovery - Washington State University · = 1.229 kg/cu m parachute area velocity Solve for...
Transcript of Recovery - Washington State University · = 1.229 kg/cu m parachute area velocity Solve for...
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RecoveryDen, Grace, Emma, Chris, Edward, Ryan, Phil
Recovery relies heavily on electronics and structures designs.
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Goals/Objectives:● Safely descend
● Rocket must be reusable
○ Important for points!
● Design a guidance system
○ Land in close proximity of launch zone
● Deployment stages
● Completely dumbfound the judges and spectators
with our awesome recovery skills!!!
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Chutes● Addition of slider
● Guidance properties of the ram-air chute
○ Motor setup and programming
○ Rigorous testing
● Chute design
Slider addition
Guidance!
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Parachute Configuration● Cord strength
○ Withstand deployment tension
● Line material
○ Usually made from braided strands of nylon or synthetic fibers
○ Cord types
● Packing
(Right) Chute packing, (Above) Cord types.
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Drag Coefficient ● Dependent on chute radius
○ Average drag coefficient for round parachutes is 1.75
● Testing
Governing drag equation
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Ejection Considerations/Variables
● Ejection charge mass
● Ejection force on nosecone
● Length for pressurization chamber
● Wind pressure
● Projection area
● Drag coefficient
Ideal separation
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Additional Considerations● Initial calculations do not include shear
pin forces
● Electronics integration
● Student-built chutes!
● Outside resources
Yes! NO!