High Power Rocketryrocketry.gatech.edu/files/slides/High_Power_Rocketry.pdf · High Power Rocketry...
Transcript of High Power Rocketryrocketry.gatech.edu/files/slides/High_Power_Rocketry.pdf · High Power Rocketry...
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High Power Rocketry
Taking rocketry to the next level
2/18/15 1
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What is a High Power Rocket?
• Not to be confused with a model rocket • Significantly larger, more powerful, more
dangerous • Need FAA waivers to fly • Uses ammonium perchlorate composite
propellant (APCP) or experimental propellants – Typically not black powder
2/18/15 Ramblin’ Rocket Club 2
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Rules and Regulations
• NFPA 1127 • High Power Rocket Safety Code
– Certification – Materials – Motors – Ignition system – Misfires – Launcher – Size – Flight safety – Launch site – Recovery system
2/18/15 Ramblin’ Rocket Club 3
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How do I get certified?
National Association of Rocketry (NAR) • Level 1
– Build and successfully fly a conventional rocket with a single H or I commercial motor.
• Level 2 – Build and successfully fly a
conventional rocket with a single J, K or L commercial motor and pass a written exam (88% or better).
• Level 3 – Build and successfully fly a
conventional rocket with a single M, N, or O commercial motor and have the design verified by the L3CC.
Tripoli Rocketry Association (TRA) • Level 1
– Build and successfully fly a conventional rocket with a single H or I commercial motor.
• Level 2 – Build and successfully fly a
conventional rocket with a single J, K or L commercial motor and pass a written exam.
• Level 3 – Build and successfully fly a
conventional rocket with a single M, N, or O commercial motor and have the design verified by 2 TAP members and have successfully completed a flight using electronic deployment mechanisms.
2/18/15 Ramblin’ Rocket Club 4
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Level 1 High Power Rockets
• Impulse range 160-640 N-s OR
• Greater than 80 N average thrust OR
• Greater than 125g of propellant OR
• Uses a hybrid motor OR • Weighs more than 1.5 kg
including propellant OR • Includes ductile metal in
the airframe • Includes H and I motors
2/18/15 Ramblin’ Rocket Club 5
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Level 2 High Power Rockets
• Impulse range 640-5,120 N-s
• Includes J, K, and L motors
• More advanced rocket systems than Level 1.
2/18/15 Ramblin’ Rocket Club 6
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Level 3 High Power Rockets
• Impulse range 5,120-40,960 N-s
• Includes M, N, O commercial motors and larger experimental motors
• Typically involve electronics for deployment and much heftier construction.
2/18/15 Ramblin’ Rocket Club 7
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Class 3 Rockets
• A rocket with total impulse exceeding 40,960 N s
• Equivalent to a P motor and greater
• Requires a special FAA approval in addition to FAA waiver
2/18/15 Ramblin’ Rocket Club 8
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Engineering Considerations
• Stronger materials – Fiberglass, carbon fiber, thick plywood
• Electric systems – Parachute deployment, data sensing and
acquisition, tracking, beaconing, lights • Aerodynamics
– Stability, fin flutter, Mach number • Thermal
– High velocities, recovery pyros, electric systems
2/18/15 Ramblin’ Rocket Club 9