...
- The black, dark blue, and blue sets of lines represent the different vehicle weights (157, 167, and 177 lbs)
- The different lines within those sets represent the different launch angles
- These sets of lines follow the ascent and descent without parachute
- The light blue steady state descent lines represent descent with parachute
Design tasks
Write up analysis up until this point
See Drogue Parachute Analysis.
Recalculate forces, dynamic pressures, and descent rates for updated rocket
Opening Shock Force (Potvin, 2)
...
| Fabric, oz/yard | t, inches |
|---|---|
| 1.1 | .005 |
| 1.6 | .006 |
Find drogue Cd
Maydew gives Cd_0 = .53-.58, Dc/D0 = .73, and Dp/D0 = .65 (15).
...
Cruz (Wind tunnel paper), gives Cd in terms of S0. S0 = S_disk+S_gap+S_band.
Characterize Main
...
air density at MDRA: .00245 sg/ft^3. Based on telemetrum pressure and assuming a dry and 46F day.
Size drogue
As of December 12, the mass budget says the rocket will be about 95lb dry.
Follow Knacke 1991, chapter 7.
Pick geometric ratios
Read Clark and Tanner.
Calculate stresses and forces in components
Pick fell and hem types
See Neal & Wellings page 5.
See Poynter.
Calculate design factors
SRB drogue and main design factors (Maydew et al., 131)
...
I think Knacke has some design factor design guides
Calculate required textile strengths
Find most suitable cloths and tapes
Find suppliers and order textiles
Other tasks
Get design reviewed
Draw schematics
Determine proper assembly procedures
Review Knacke for gore fullness checks.
Enkles (in Barker with the other parachute books) has some comments.
See Poynter.
Create master list of construction details
Arrange wind tunnel test
Sources
Lingard. 09_Supersonic Parachute Aerodynamic Testing and Fluid Structure Interaction Simulation_Lingard.pdf. (n.d.). Retrieved from https://solarsystem.nasa.gov/docs/09_Supersonic%20Parachute%20Aerodynamic%20Testing%20and%20Fluid%20Structure%20Interaction%20Simulation_Lingard.pdf
Bollermann, B. (1970). A Study of 30 Km to 200 Km Meteorological Rocket Sounding Systems: Literature and data review (2 pts.) (Vol. 1). National Aeronautics and Space Administration.
Clark, I., & Tanner, C. (2017). A historical summary of the design, development, and analysis of the disk-gap-band parachute. In 2017 IEEE Aerospace Conference (pp. 1–17). https://doi.org/10.1109/AERO.2017.7943854
Neal, M., & Wellings, P. (1995). Design and qualification of the descent control sub-system for the Huygens probe. American Institute of Aeronautics and Astronautics. https://doi.org/10.2514/6.1995-1533
Maydew, R. C., Peterson, C. W., & Orlik-Rueckemann, K. J. (1991). Design and Testing of High-Performance Parachutes (La Conception et les Essais des Parachutes a Hautes Performances) (No. AGARD-AG-319). ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRANCE). Retrieved from http://www.dtic.mil/docs/citations/ADA246343
Potvin, J. (2009). Updating and Upgrading the World’s Database on the Opening Shock Factor Ck. American Institute of Aeronautics and Astronautics. https://doi.org/10.2514/6.2009-2905
Poynter, D. (1984). The parachute manual: a technical treatise on aerodynamic decelerators (3rd ed., completely rev). Santa Barbara, CA: Para Pub.
Ubico, R. E. (1963). FABRICATION AND DELIVERY OF ARCAS SOUNDING ROCKET SYSTEMS EX 6 MOD 0 AND EX 6 MOD 1. ATLANTIC RESEARCH CORP ALEXANDRIA VA.