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Introduction to high power rocketry

Introduction to high power rocketry. Dr. Adam M Baker. Summary. How does HPR differ from model rocketry? Some design guidelines for HPR Something on payloads Examples of HPR Still images... Videos...HARDWARE! Amateur rocketry www.ukra.org.uk. HPR v. Model rockets (1).

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Introduction to high power rocketry

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  1. Introduction to high power rocketry Dr. Adam M Baker

  2. Summary • How does HPR differ from model rocketry? • Some design guidelines for HPR • Something on payloads • Examples of HPR • Still images... Videos...HARDWARE! • Amateur rocketry www.ukra.org.uk

  3. HPR v. Model rockets (1)

  4. HPR v. Model rockets (2) • ESTES • Aerotech K550W

  5. HPR v. Model rockets (3)

  6. HPR v. Model rockets (4) • Models • Paper • Balsa • Plastic • HPR • Metals e.g. Aluminium • CFRP • Phenolic tubing

  7. HPR v. Model rockets (5) • Mass, Size • Motors • Trajectory • Materials, components SAFETY

  8. Where can I get help? • UK Rocketry Association • www.ukra.org.uk • Rules, regs , lots of ‘experts’ • ESSENTIAL for launch • Rockets ‘n’ Things • Malcolm Jennings • Main supplier in Southern England for HPR parts • www.rocketsandthings.com

  9. Guidelines For HPR design

  10. Stability (1) • Defined by Barrowman equations • Cp v. Cg, or • ‘Static margin’ http://my.execpc.com/~culp/rockets/Barrowman.html http://www.apogeerockets.com/downloads/pdfs/barrowman_report.pdf

  11. Stability (2) • Barrowman • Slender body theory • (L/D) between 10 and 35 • 15 < CN <30 • Subsonic flight. • ‘Thin’ cross-section fins. • Velocity • Min 20m/s for fins to act • Or 50m/s2 acceleration (4m launch tower / rail) • 6:1 T:W on launch • Static stability margin • 1.5-2.5 calibres

  12. Launch ramp / tower / rail

  13. Motor mounting

  14. Structure Fin Lat. loading Fin alignment Fin Long. loading

  15. Structure (2) • Coupling sections of rocket

  16. Recovery

  17. Recovery (2) • Redundancy • Test TestTest! • Tracking

  18. HPR Payloads

  19. Payloads (1) • Accelerometer / altimeter • E.g. • G-Wiz • P-Nut • Flight computer • E.g. R-DAS Credit: Richard Osborne http://www.aedelectronics.nl/rdas/

  20. Payloads (2) • Altimeter / recovery • Cameras Credit: Richard Osborne ‘GoPro.com’ video cameras

  21. Payloads (3) Credit: Richard Osborne

  22. Examples of HPR

  23. AspireSpace, ASRV-1a Thetford 1997 K-class motor , 1250Ns 2.1m long, 100mm diam. 5000ft apogee

  24. BURT Bristol Uni Rocket Team 1999 NRC runner-up

  25. 2000 • Teams from • Manchester (UMIST) • Kent • Kingston

  26. M.A.R.S. 2000 USA 25,000ft, a UK record

  27. ‘Amateur’ rocketry

  28. AspireSpace, Comer (Scotland) & Lincs 2001, 2002

  29. Garvey Aerospace www.garvspace.com Mojave, USA, 2005

  30. Flometrics / San Siego State University www.flometrics.com Mojave, USA, 2005

  31. Recap • How does HPR differ from model rocketry? • Some design guidelines for HPR • Something on payloads • Examples of HPR • Still images... Videos...HARDWARE! • Amateur rocketry • Who can help? • www.ukra.org.uk

  32. October 28th, 2021

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