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Propulsion Preliminary Design Review

This document provides a preliminary selection and analysis of the propulsion system for Phoenix Aerospace. It includes details on motor, speed control, batteries, propeller, gearbox, and cost analysis.

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Propulsion Preliminary Design Review

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  1. Propulsion Preliminary Design Review Phoenix Aerospace – Propulsion Team Brian Darr – Lead Jon Peterman Andy Wiratama Phoenix Aerospace AAE 451 – Fall 2001

  2. Objectives • Preliminary selection and analysis of propulsion system • Motor • Speed Control • Batteries • Propeller • Gearbox • Preliminary cost analysis of propulsion system Phoenix Aerospace AAE 451 – Fall 2001

  3. MotoCalc Inputs • Wing & Airfoil • Wing sizes calculated from constraint analysis • Calculations for one wing since MotoCalc assumes one wing • One wing calculations are conservative due to 50% theoretical drag reduction for tandem wing configuration • Airfoils from preliminary selection (Selig, Wortmann, …) • Area = 1272 in2 • Span = 100.8 in • Cl = 0.55 • Airframe • Weight = 52 oz. (structure, radio gear, rate gyro) • No landing gear (negligible effects when compared to configuration with landing gear) • Flying Field • Altitude = 600ft • Temperature = 72° F (Mollenkopf temperature ?) Phoenix Aerospace AAE 451 – Fall 2001

  4. Propulsion Inventory • Model Electronics Turbo 10 GT • No longer available • Still used for analysis • Astro Cobalt • High current draw • Large battery pack for endurance • MaxCim Max15 • High current draw • Large battery pack for endurance • Graupner Speed 400 • Under powered • Requires large battery pack to attain flight speed • Kyosho Le Mans 240S • Under powered • Requires large battery pack to attain flight speed Phoenix Aerospace AAE 451 – Fall 2001

  5. Propulsion Configurations • Model Electronics Turbo 10 GT • Battery: Panasonic 3000 NiMH; 6 cells • Speed Control: Generic High Rate ESC; 0.003 Ohms; 0.7oz • Drive System: Generic 17x10in Propeller; 6:1 Gearbox • Weight • MotoCalc predicted weight: 70.8oz • Constraint predicted weight: 81.6oz • Predicted endurance • At design point, 100% throttle: 8min 45sec • Max endurance, 74% throttle: 30min 54sec • Cost: • Motor cost: $65.00 (MSRP) • No speed controller purchase required • MotoCalc Opinion • Motor not at peak efficiency, battery weight would increase to reach peak efficiency • Sedate flyer with possible aerobatic maneuvers Phoenix Aerospace AAE 451 – Fall 2001

  6. Propulsion Configurations • Kyosho EndoPlasma 16T • Battery: Panasonic 3000 NiMH; 6 cells • Speed Control: Generic High Rate ESC; 0.003 Ohms; 0.7oz • Drive System: Generic 16x10in Propeller; 6:1 Gearbox • Weight • MotoCalc predicted weight: 71.1oz • Constraint predicted weight: 81.6oz • Predicted endurance • At design point, 100% throttle: 7min 18sec • Max endurance, 66% throttle: 32min 30sec • Cost: • Motor cost: $24.99 (Tower Hobbies) • Speed controller purchase may be required • MotoCalc Opinion • Motor not at peak efficiency, battery weight would increase to reach peak efficiency • Sedate flyer with possible aerobatic maneuvers Phoenix Aerospace AAE 451 – Fall 2001

  7. Propulsion Configurations • Kyosho Atomic Force 17T • Battery: Panasonic 3000 NiMH; 7 cells • Speed Control: Generic High Rate ESC; 0.003 Ohms; 0.7oz • Drive System: Generic 16x11in Propeller; 6:1 Gearbox • Weight • MotoCalc predicted weight: 73.1oz • Constraint predicted weight: 81.6oz • Predicted endurance • At design point, 100% throttle: 6min 41sec • Max endurance, 61% throttle: 36min 46sec • Cost: • Motor cost: $24.99 (Tower Hobbies) • Speed controller purchase may be required • MotoCalc Opinion • Battery temperature exceeds suggested maximum temperature limit • Sedate flyer with possible aerobatic maneuvers Phoenix Aerospace AAE 451 – Fall 2001

  8. Propulsion Configurations • Trinity Sapphire 17T • Battery: Panasonic 3000 NiMH; 6 cells • Speed Control: Generic High Rate ESC; 0.003 Ohms; 0.7oz • Drive System: Generic 15x10in Propeller; 6:1 Gearbox • Weight • MotoCalc predicted weight: 72.8oz • Constraint predicted weight: 81.6oz • Predicted endurance • At design point, 100% throttle: 7min 29sec • Max endurance, 60% throttle: 38min 33sec • Cost: • Motor cost: $27.99 (Tower Hobbies) • Gearbox will need to be purchased • Speed controller purchase may be required • MotoCalc Opinion • Motor operates efficiently at full throttle • Sedate flyer with possible aerobatic maneuvers • Best performance of analyzed propulsion systems Phoenix Aerospace AAE 451 – Fall 2001

  9. Summary & Conclusions • Summary of MotoCalc results • Conclusions • Trinity Sapphire appears to be the best propulsion to meet design requirements • All four design will be analyzed using other methods (eg: gold.m) • Design requirements achievable with low cost, low weight propulsion system Phoenix Aerospace AAE 451 – Fall 2001

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