Student Working With Hybrid Rocket Motors

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1. Students Working With Hybrid Rocket Motors<br />Johann Schrell<br /> 2. The Motor<br />Simple floating bulkhead type hybrid motor<br />Fuel:…
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  • 1. Students Working With Hybrid Rocket Motors<br />Johann Schrell<br />
  • 2. The Motor<br />Simple floating bulkhead type hybrid motor<br />Fuel: HTPB; Ox: N20<br />Thrust: 30-70 lbf<br />Isp: ~285 sec<br />
  • 3. Configuration<br />Snap-ring/washer retained nozzle<br />Fuel grain sits on nozzle<br />Ox injector sits on fuel grain<br />Portion above injector is ox tank<br />Top bulkhead acts as closure and fill/vent/pressure transducer port.<br />
  • 4. Student Work<br />All work was done by students with some machining done by others.<br />Work included all hardware designs and rocket design and construction<br />Also included all test, launch, and ground support systems and many other areas such as:<br />Tanks, feed system, data acquisition, test stand, flight computers, test area safety, marketing, reports, fund raising, etc<br />
  • 5. The Team<br />All student team from student club of all collegiate years.<br />
  • 6. The Rockets<br />Chuck Norris<br />Designed for precision altitude launch and butt kicking<br />Speedy Gonzalez<br />Designed for supersonic high altitude launch<br />
  • 7. Testing<br />All testing performed on campus at ERAU using student test stand/equipment.<br />Approx 20 tests with one failure and one “anomaly”.<br />Some difficulty with test stand as it was being modified for dual puprose testing. (hybrids and liquids).<br />
  • 8. Flight Day<br />Some troubles with feed and ignition system timing threw rocket trajectory into an unstable spiral<br />
  • 9. Example of Static Test<br />
  • 10. Backfit for a static test.<br />
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