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Rocket Flight Analysis Team Members:________________________________ Measure flight time and angle Rocket when ejection Rocket when ejection charge is seen.(white puff of smoke) Launch site baseline You need ONE Successful launch. Two are written here in case the first launch is unsuccessful. 2nd Launch 1st Launch Variables Engine type used Avg Thrust Force of engine(N) Mass of rocket before launch (include engine and wadding)(kg) Mass of propellant kg Average mass during thrust stage kg Thrust time (s) Time to maximum height (s) Total flight time (s) Baseline (m) Angle at maximum height/ejection charge (degrees) Calculated Maximum height (m) Cross sectional diameter of rocket (mm) Parachute diameter (mm) Calculate acceleration of rocket during thrust stage Free body diagram F=F(net)=ma Fthrust -Wavg=mavga a= Fthrust -Wavg/mav Thrust Force (N) Final Thrust velocity Vf =vi + at (t= thrust time) Net Force F(net)=ma Thrust displacement d=1/2at2 (t= thrust time) Weight (N) Thrusting stage calculations table Launch trial Thrust time(s) Acceleration(m/s/s) Final Thrust Velocity (m/s) Displacement during thrust stage (m) 1st 2nd Coasting stage calculations table Assume final thrust velocity = initial coasting velocity d= 1/2gt2 + vit (g= -10m/s/s) Launch trial Time maximum height (s) to Coasting (s) time Initial coasting Displacement to velocity (m/s) ejection charge during coasting stage (m) Total displacement to ejection charge height (m) Data calculated from "Model Rocket Altitude Predictor" internet site http://webalt.markworld.com/webalt.html Launch trial Height to ejection Peak speed Total flight charge(m) (use time (m/s)(same as final time (s) from above table) thrust velocity) Determine percent error for ejection charge height between your calculated values, Internet site, and actual data (use your internet site data as the true value) Your calculated value ignores air resistance. The Internet site includes air resistance. Your calculated values. Internet site Actual measured value vs. Internet site Discussion of results and conclusions Be sure to discuss all of the aspects of the flight of your rocket (thrusting, coasting and recovery stages) and compare it to the theoretical flight of your calculations and of the internet site. Don't be brief!!! More PHUN PHUN PHUN Links to Model Rocket formula and descriptions http://www.rocketmime.com/ http://my.execpc.com/~culp/rockets/rckt_sim.html http://www.rocketmime.com/rockets/rckt_eqn.html