Introduction to high power rocketry Dr. Adam M Baker.

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Presentation transcript:

Introduction to high power rocketry Dr. Adam M Baker

Summary 1.How does HPR differ from model rocketry? 2.Some design guidelines for HPR 3.Something on payloads 4.Examples of HPR Still images... Videos...HARDWARE! 5.Amateur rocketry

HPR v. Model rockets (1)

HPR v. Model rockets (2) ESTES Aerotech K550W

HPR v. Model rockets (3)

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

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

Where can I get help? UK Rocketry Association Rules, regs, lots of ‘experts’ ESSENTIAL for launch Rockets ‘n’ Things – Malcolm Jennings Main supplier in Southern England for HPR parts

Guidelines For HPR design

Stability (1) – Defined by Barrowman equations – Cp v. Cg, or – ‘Static margin’

Stability (2) Barrowman – Slender body theory 1.(L/D) between 10 and < C N <30 3.Subsonic flight. 4.‘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 calibres

Launch ramp / tower / rail

Motor mounting

Structure Fin alignment Fin Long. loading Fin Lat. loading

Structure (2) Coupling sections of rocket

Recovery

Recovery (2) Redundancy Test Test Test! Tracking

HPR Payloads

Payloads (1) Accelerometer / altimeter – E.g. G-Wiz P-Nut Flight computer – E.g. R-DAS Credit: Richard Osborne

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

Payloads (3) Credit: Richard Osborne

Examples of HPR

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

BURT Bristol Uni Rocket Team 1999 NRC runner-up

2000 Teams from Manchester (UMIST) Kent Kingston

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

‘Amateur’ rocketry

AspireSpace, Comer (Scotland) & Lincs 2001, 2002

Garvey Aerospace Mojave, USA, 2005

Flometrics / San Siego State University Mojave, USA, 2005

Recap 1.How does HPR differ from model rocketry? 2.Some design guidelines for HPR 3.Something on payloads 4.Examples of HPR Still images... Videos...HARDWARE! 5.Amateur rocketry 6.Who can help? –

October 28 th, 2021