Aether Aerospace AAE 451 October 3, 2006

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Presentation transcript:

Aether Aerospace AAE 451 October 3, 2006 Propulsion QDR 2 Aether Aerospace AAE 451 October 3, 2006 Mark Davis Ashley Gordon Hank Kneitz Ryan Mulligan Joshua Rodewald Brandon Wampler Mathieu Hautier Samantha Pearcy

Overview Phase 1: Aircraft Subsystem Phase 2: Battery Subsystem Phase 3: Motor Subsystem Phase 4: Propeller & Gearbox Subsystems September 20, 2018 AAE 451, Aether Aerospace

Phase 1: Aircraft Subsystem Revisit Constraint Analysis with updated aircraft parameters CL,max = 1.55 Cd0 = 0.032 L/Dmax ≈ 8 W/S = 1.65 P/S = 2.41 Power Required (at 150 ft/s) = 2.3 Bhp September 20, 2018 AAE 451, Aether Aerospace

Phase 2: Battery Subsystem $250 Budget Propulsion System will be majority of cost ~$200-$210 Propeller ~ $10 (Tower Hobbies) Motor ~ $70~$100 (Prop. PDR) Gearbox ~ $20 (Mega) BATTERY EST. PRICE ~ $80-$110 September 20, 2018 AAE 451, Aether Aerospace

Phase 2: Battery Subsystem Battery Database: Values average for over 70 batteries LiPo’s most cost and weight efficient Chose Polyquest 4400 3 cell battery pack Energy Density (kJ/lb) NiCad 48 NiMH 51 LiPo 750   J/$ NiCad 861 NiMH 819 LiPo 3,068 September 20, 2018 AAE 451, Aether Aerospace

“Hi-Po” 4400 3 cell 3 Cell 11.1V 4400 mAh Discharges continuously @ 53A and peaks @ 70A Size: 5-7/8x1-3/4x7/8” Weight: 10.7 oz Price: $103.90 September 20, 2018 AAE 451, Aether Aerospace

Phase 3: Motor Subsystem Rimfire 35-48-1300Kv Kv = 1300 RPM/V Kt = 1.040 in*oz/amp Rm ~ 0.03 Ohm (est.) Io = 4.2 Price: $69.99 September 20, 2018 AAE 451, Aether Aerospace

Phase 3: Motor Subsytem RPM = Kv x (Vin-In x Rm) = 11700 RPM Torque = Kt x (Iin – Io) = 68.4 in*oz Pout = Torque x RPM = 0.79 hp September 20, 2018 AAE 451, Aether Aerospace

Phase 4: Propeller and Gearbox Subsystems Efficiencies Prop & Gearbox Eff. ~ 0.8 Pout(Motor) ~ 1.25*Pnet Net Power Out ~ 0.63 hp Online Research: Propeller ~ $10 Gearbox ~ $20 September 20, 2018 AAE 451, Aether Aerospace

Total System Cost Battery $103.90 Motor $ 69.99 Prop. $ 10.00 Gearbox $ 20.00 Total $203.89 September 20, 2018 AAE 451, Aether Aerospace

New Top Speed Using Constraint Analysis and Varying Vmax: September 20, 2018 AAE 451, Aether Aerospace

New Top Speed Solving the Curve-fit Equation: Vmax = 60 ft/s This number is dependent on the aerodynamic properties, but is more accurate than original goal Revisit Aero Analysis September 20, 2018 AAE 451, Aether Aerospace

Questions? The Angry Mosquito September 20, 2018 AAE 451, Aether Aerospace