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Milestone Review Flysheet 2021-2022
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Institution
Portland Rocketry
Milestone
FRR
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Vehicle PropertiesRecovery System Properties - Recovery Electronics
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Total Length (in)81.4Primary Altimeter Make/ModelEntacore Aim Altimeter
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Diameter (in)4.01Secondary Altimeter Make/ModelEasyMini: Altimeter
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Gross Lift Off Weigh (lb)12Other Altimeters (if applicable)N/A
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Airframe Material(s)Fiber glassRocket Locator (Make/Model)TeleGPS
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Fin Material and Thickness (in)Plywood reinforced w/ Fiber GlassAdditional Locators (if applicable)TeleGPS
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Coupler Length(s)/Shoulder Length(s) (in)8 - 12Transmitting Frequencies (all - vehicle and payload)Rocket LocatorAdditional Locator
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440 MHz100 MHz
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Motor PropertiesDescribe Redundancy Plan (batteries, switches, etc.)1 battery and 1 switch for each component
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Motor Brand/DesignationCesaroni J355
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Max/Average Thrust (lb)97.63 / 79.43
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Total Impulse (lbf-s)267.41Pad Stay Time (Launch Configuration)5 hrs
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Mass Before/After Burn (oz)41.447 / 17.849
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Liftoff Thrust (N)378.1
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Motor Retention MethodAeropack 54 mm screw-in retainerRecovery System Properties - Drogue Parachute
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Manufacturer/ModelApogee/18" Cut-To-Size Plastic Hexagon
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Stability AnalysisSize or Diameter (in or ft)18 in
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Center of Pressure (in. from nose)62.24Main Altimeter Deployment SettingApogee / 5000 feet
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Center of Gravity (in. from nose)53.51Backup Altimeter Deployment Setting2 seconds after Apogee
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Static Stability Margin (on pad)2.18Velocity at Deployment (ft/s)0
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Static Stability Margin (at rail exit)2.1Terminal Velocity (ft/s)90.9333
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Thrust-to-Weight Ratio6.56Recovery 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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Rail Size/Type and Length (in)1515/96
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Rail Exit Velocity (ft/s)54.27Recovery Harness Length (ft)23.333
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Harness/Airframe InterfacesEyebolt (¾ inch) and Quicklink (1 inch)
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Ascent Analysis
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Maximum Velocity (ft/s)614.5Kinetic Energy of Each Section (Ft-lbs)Section 1Section 2 Section 3 Section 4
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Maximum Mach Number0.54683.56584.95937.77N/A
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Maximum Acceleration (ft/s^2)235.2
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Target Apogee (ft)5000
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Predicted Apogee (From Sim.) (ft)5129Recovery System Properties - Main Parachute
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Manufacturer/ModelApogee/58" Nylon Octagon
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Recovery System Properties - OverallSize or Diameter (in or ft)48 in
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Total Descent Time (s)84Main Altimeter Deployment Setting (ft)550
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Total Drift in 20 mph winds (ft)636Backup Altimeter Deployment Setting (ft)500
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Velocity at Deployment (ft/s)90.9333
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Recovery System Properties - EnergeticsTerminal Velocity (ft/s)12.159
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Ejection System Energetics (ex. Black Powder)Black Powder Recovery 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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Energetics Mass - Drogue Chute (grams)PrimaryTo Be Tested when Materials Arive
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BackupTo Be Tested when Materials AriveRecovery Harness Length (ft)23
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Energetics Mass - Main Chute (grams)PrimaryTo Be Tested when Materials AriveHarness/Airframe InterfacesEyebolt (¾ inch) and Quicklink (1 inch)
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BackupTo Be Tested when Materials Arive
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Energetics Mass - Other (grams) - If ApplicablePrimary1175 grams (motor)Kinetic Energy of Each Section (Ft-lbs)Section 1Section 2 Section 3 Section 4
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BackupN/A6.8848.1360.68N/A
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Milestone Review Flysheet 2021-2022
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Institution
Portland Rocketry
Milestone
FRR
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Payload
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Payload 1 (official payload)Overview
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Payload 1 contains the dual deployment altimeter, the locators, and the transmittors
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Payload 2 (non-scored payload)Overview
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Payload 2 contains the IMU, storage unit, and the arduino used for the experiment
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Test Plans, Status, and Results
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Ejection Charge TestsSubscale - Done in December
Full Scale - Will do when all materials arive
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Sub-scale Test FlightsDone in December
Video Proof: https://www.youtube.com/watch?v=lzPwyVomL9Q
Data from Flight: to the right
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Vehicle Demonstration Flightshttps://youtu.be/erZ_Xeb4Z8E
https://docs.google.com/spreadsheets/d/1xfaQnlvyRihTWwQclajP8R6ZExnLrJx_l6988S2aHE8/edit#gid=0
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Payload Demonstration FlightsPlan to test at Launch in March
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