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Milestone Review Flysheet 2022-2023
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InstitutionPortland Rocketry
Milestone
CDR
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Vehicle PropertiesRecovery System Properties - Recovery Electronics
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Total Length (in)83.87Primary Altimeter Make/ModelEntacore Aim Altimeter
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Diameter (in)4.014Secondary Altimeter Make/ModelEasyMini: Altimeter
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Aspect Ratio20.89436971Other Altimeters (if applicable)
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Gross Lift Off Weight (lb)12.31Rocket Locator (Make/Model)TeleGPS
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Ballast Amount (lb) / Material / Location0Additional Locators (if applicable)TeleGPS
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Launch Vehicle Burn Out Weight (lb)1.375625Transmitting Frequencies (all - vehicle and payload)Rocket LocatorAdditional Locator
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Airframe Material(s)Fiberglass440 MHz100 MHz
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Fin Material and Thickness (in)Fiberglass (0.1-0.2 inches)Describe Redundancy Plan (batteries, switches, etc.)1 battery and 1 switch for each component
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Coupler Length(s)/Shoulder Length(s) (in)Shoulder: 4 inches, Couplers: 7 inches
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Motor PropertiesPad Stay Time (Launch Configuration)5 hrs
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Motor Brand/DesignationCesaroni J449BS
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Max/Average Thrust (lb)38.77/21.22
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Total Impulse (lbf-s)432.75
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Mass Before/After Burn (oz)39.58 / 17.57

Recovery System Properties - Drogue Parachute
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Liftoff Thrust (N)170.2Manufacturer/ModelApogee/18" Cut-To-Size Plastic Hexagon
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Motor Retention MethodAeropack 54 mm screw-in retainer Size or Diameter (in or ft)18 in
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Main Altimeter Deployment SettingApogee / 5000 feet
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Stability AnalysisBackup Altimeter Deployment Setting2 seconds after Apogee
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Center of Pressure (in. from nose)67.17Velocity at Deployment (ft/s)0
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Center of Gravity (in. from nose)52.75Terminal Velocity (ft/s)96.8
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Static Stability Margin (on pad)3.61Recovery Harness Material, Size, and Type (examples - 1/2 in. tubular Nylon or 1 in. flat Kevlar strap)1 inch Tubular Nylon
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Static Stability Margin (at rail exit)3.685
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Thrust-to-Weight Ratio7.66Recovery Harness Length (ft)23.333
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Rail Size/Type and Length (in)1010/12 ftHarness/Airframe InterfacesEyebolt (¾ inch) and Quicklink (1 inch)
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Rail Exit Velocity (ft/s)78.6474 ft/s
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Kinetic Energy of Each Section (Ft-lbs)
Above Avionics
Avionics Bay
Below Avionics
Section 4
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Ascent Analysis506.81310.21470.41
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Maximum Velocity (ft/s)654.36
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Maximum Mach Number0.581164
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Maximum Acceleration (ft/s^2)311.76
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Target Apogee (ft)4100 ftRecovery System Properties - Main Parachute
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Predicted Apogee (From Sim.) (ft)5278.22Manufacturer/ModelApogee/58" Nylon Octagon
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Size or Diameter (in or ft)48 in
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Recovery System Properties - OverallMain Altimeter Deployment Setting550
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Total Descent Time (s)87.67 Backup Altimeter Deployment Setting500
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Total Drift in 20 mph winds (ft)465.168Velocity at Deployment (ft/s)96.8
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Terminal Velocity (ft/s)27.9
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Recovery System Properties - EnergeticsRecovery Harness Material, Size, and Type (examples - 1/2 in. tubular Nylon or 1 in. flat Kevlar strap)1 inch Tubular Nylon
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Ejection System Energetics (ex. Black Powder)FFFF Black Powder
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Energetics Mass - Drogue Chute (grams)PrimaryRecovery Harness Length (ft)23
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BackupHarness/Airframe InterfacesEyebolt (¾ inch) and Quicklink (1 inch)
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Energetics Mass - Main Chute (grams)Primary
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BackupKinetic Energy of Each Section (Ft-lbs)
Above Avionics
Avionics Bay
Below Avionics
Section 4
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Energetics Mass - Other (grams) - If ApplicablePrimary42.1025.7739.08
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Backup
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Milestone Review Flysheet 2022-2023
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InstitutionPortland Rocketry
Milestone
CDR
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Payload
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Payload 1 (official payload)Overview
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Airbreak System to make the rocket go close to 4100 feet
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Payload 2 (non-scored payload)Overview
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Test Plans, Status, and Results
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Ejection Charge TestsEjection tests will be completed in February after tha full scale rocket is built
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Sub-scale Test FlightsCompleted on 1/2/2023
Link to Video: https://youtube.com/shorts/IE9gx0IT_WU?feature=share
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Vehicle Demonstration FlightsAt the December or January Goldendale Launch
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Payload Demonstration FlightsTo do with the Vehicle Demonstration Flight
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