New team. Project Diffusion. The effect of gravitational stress on the diffusion of liquids . Part 1: Vehicle. Major Milestone Schedule. GANTT Chart. Mission Profile Chart. Event 3: Apogee at 16s, 4502ft. Coast. Drogue descent.
The effect of gravitational stress on the diffusion of liquids.
Apogee prediction updated based on data from full scale full-impulse flight (Cd=0.65):
Main parachute deployment at
Ignition at 0s, 0ft
CP 83.1” from nosecone
CG 65.6” from nosecone
Static margin 5.5 calibers
Diameter 5.5”(body tube), 4”(booster)
Liftoff Weight 21 lbs with AT-K1050W
Motor Aerotech K1050W
Mach delay of 4 seconds will be set on both deployment altimeters
(the setting was successfully tested during full impulse test flight)
Apogee 4502ft, 16s
Cd = 0.65
(from flight data)
(Mach number: 0.66)
Charges have been finalized via static ejection tests.
Per NASA recommendation we have upgraded our backup charges by 25% and delayed their activation. If primary charge fails, backup charge will “try harder”, otherwise it fires harmlessly in open air.
Calculated Cd :
Apogee for full scale impulse vehicle (Cd=0.61):
Apogee : 3325ft at 13.4s
Drogue Descent: measured rate 43fps (average)
Main parachute: deploys at 500ft
Final Descent: measured rate 21fps(average)
Because of a construction error, our fin assembly separated from the rest of the rocket at apogee (due to deployment shock). The problem has been fixed by adding 12 screws.
Our drogue parachute was by mistake tied far from its upper anchor point (this increases the chance of drogue not leaving the body). The problem has been solved by moving the drogue closer to its upper anchor point.
Calculated Cd :
Apogee for full scale vehicle (Cd=0.65): 4502 ft
Apogee : 4502ft at 16.00s
Drogue Descent: measured rate 54fps (average)
Main parachute: deploys at 700ft
Final Descent: measured rate 23fps (average)
Our rocket landed in the tree and we have lost some of its parts. This results in following issues:
* MAWD altimeters are no longer available and we will be replacing them with StratoLogger altimeters. While we will have no opportunity to test the StratoLogger units ourselves before the launch in Huntsville, our sister team has used StratoLoggers with success during their full impulse test flight.
To further reduce the drift, we’d rather use a smaller drogue than to decrease the size of the main parachute (the booster impact energy is near the allowed maximum of 75ft-lbf)
We will investigate the effects of acceleration and vibrations during flight on the diffusion of dye into liquids using digital imaging.
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)
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.