Flight Readiness Review

Intimidator 5: 5” diameter, 10’ length, 47 lbs  Motor: Aerotech L1300R 4556 N-Sec of impulse  Predicted altitude 5203’- RockSim 5292’ - AeroDRAG  Altitude reached can be adjusted by adding or removing weight. Rocket w/out additional weight: 44 lbs

 Thrust to weight ratio= 6.5:1 Well above the suggested 5:1  Launch Rail: 12 ft high Exit velocity - 65 ft/s - RockSim

 Parachute sizes Drogue – 3 ft Main – 12 ft  Parachute descent rates Drogue: Must be between 50 and 100 ft/s  ft/s– RockSim  ft/s – Mathcad Main: Must be between 17 and 22 ft/s  21.1 ft/s– RockSim  ft/s– Mathcad

 Static Stability Margin: 4.77 overstable

 Vacuum chamber testing of the R-DAS system and recovery altimeter completed  Full scale launch completed on March 19 Ejection charge test completed March 18  Static testing of full scale motor completed on March 18

 Remaining tests: Functional test of assembled payload bay Verify all instrumentation in rocket (April 2) Static tests:  Verify ejection charges  Vibration test  Second Full scale launch at METRA on April 2 (April 10 alternate date for MDRA)

 Results Two altimeter readings: 5123 ft and ~5380 ft Predicted altitude from RockSim: 2806 ft Predicted altitude from AeroDRAG: ~5800 ft  Predictions were 10% different from actual  First launch: completely successful  Second launch: partially successful recovery system

 Vacuum chamber used to re-verify deployment of drogue parachute at apogee and main parachute at predetermined height. Drop in pressure causes altimeter to detect a change in “altitude”

 Aerotech L1300R  S-load cell used  Results matched closely to expected values Maximum thrusts of 290 lbs (static test) vs 320 lbs (Aerotech)  Further calibration necessary

 Ejection charge amount determined from Modern High Power Rocketry 2 by Mark Canepa Drogue amount – 2.5 grams (redundant charge will be 3.75 grams) Main amount – 7.5 grams (redundant charge will be grams)  To verify that the charges will provide adequate force, the rocket was fully assembled with charges  Charges were ignited using a battery Rocket successfully separated

 Payload bay acts as coupler for attaching body tubes Dimensions sized with this in mind  Materials used will ensure integrity of bay  Pressure seal will guarantee accuracy of measurements

 11 Local businesses were contacted One possible sponsor  Local middle school students (48) built and launched small rockets ‘A’ class motors was be used Presentation on rocketry was be given  Lafayette hosts an afterschool program for underprivileged children Water bottle rockets will be launched with them