New team. SLI 2012. Project Diffusion. The effect of gravitational stress on the diffusion of liquids . Part 1A: Vehicle. Major Milestone Schedule. GANTT Chart. Mission Profile Chart. Event 3: Apogee at 17s, 5252ft. Coast. Drogue descent.
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The effect of gravitational stress on the diffusion of liquids.
Part 1A: Vehicle
Major Milestone Schedule
Mission Profile Chart
Apogee prediction updated based on data from scale model flight (Cd=0.48):
Main parachute deployment at
Ignition at 0s, 0ft
Vehicle Success Criteria
CP 83.1” from nosecone
CG 65.6” from nosecone
Static margin 3.2 calibers
Diameter 5.5”(body tube), 4”(booster)
Liftoff Weight 21.5 lb
Motor Aerotech K1050W
Mach delay of 4 seconds will be set on both deployment altimeters
Thrust Curve AT K1050W
Apogee at: 5252ft, 17s
Mach number: 0.72
Apogee vs. Wind Speed
Flight Safety Parameters
Ejection Charge Calculations
Calculated Ejection Charges
Charges will be finalized via static ejection tests. Tests carried out with the scale model indicated that average increase of 30% against calculated values may be needed for GOEX 4F powder.
Part 1B: Scale Model
Scale Model Launch
Scale Model Launch Objectives
Scale Model Launch Results
Calculated Cd :
Apogee for full scale vehicle (Cd=0.48): 5252 ft
Main parachute deployed at apogee and drogue at 700 ft (wiring error)
Actual Altitude Profile
Scale Model Measured Descent Rate
Due to the error in wiring, the main parachute was deployed by the apogee event and drogue parachute by the set-altitude (700ft) event. We have added a test to our preflight routine to prevent this problem from reoccurring.
Part II: Payload
We will investigate the effects of acceleration and vibrations during flight on the diffusion of dye into liquids using digital imaging.
Payload Success Criteria
Sealed Plexiglas vessel
Sealed petri dish
Dimensioned Drawing of Payload
Nikon AW100 Camera
Integration of Payload Modules
Launch and Boost
The experiment chamber is brightly lit using LEDs to prevent any exposure problems during recording
Coast and Apogee
The camcorder continues to record the diffusion process until the vehicle reaches apogee.
Accelerometer records acceleration data.
The pictures taken during the flight are analyzed
Control Group (stationary)
t Time after dye is released (flight time)
R Rate of diffusion (diffusion front speed)
P Pattern of diffusion (qualitative classification)
Test and Measurement
Measure color saturation in each pixel
Boundary rectangle: X pixels by Y pixels
To quantify the results of our experiment, we have selected the following characteristics to measure. Computerized digital image analysis will be used and we expect to process over 7 billion pixels using a multicore Linux machine.
Instrumentation and Measurement
Payload Verification Plan