October 23, 2003Propulsion QDR1 Scott Bird Mike Downes Kelby Haase Grant Hile Cyrus Sigari Sarah Umberger Jen Watson

October 23, 2003Propulsion QDR2 Preview Choice of Engine Redesigning of Propeller Manufactured Choice Cruise Conditions

October 23, 2003Propulsion QDR3 Constraining Conditions SHP constraint = 4.08 SHP design =5.0

October 23, 2003Propulsion QDR4 Preliminary Choice for Engine BME-50 Power = 5.0 hp RPM: Weight = 3.25 lbs.

October 23, 2003Propulsion QDR5 Propeller Sizing – Sizing for Take-Off Take-Off Velocity C LTO C

October 23, 2003Propulsion QDR6 Propeller Sizing – Sizing for Take-Off Lift and TO Thrust at Take-Off (Brandt et al p. 176) C

October 23, 2003Propulsion QDR7 Propeller Sizing – Sizing for Take-Off Used modified gold.m code Varied Pitch andPropeller Diameter Max RPM = 9800 Velocity Ranged from 5 ft/s to 55 ft/s in 10 ft/s intervals

October 23, 2003Propulsion QDR8 Propeller Sizing – Efficiency vs. Power

October 23, 2003Propulsion QDR9 Propeller Sizing – Sizing for Take-Off C With D=18 in., P=6 in. and V TO = ft/s Efficiency = 40 %

October 23, 2003Propulsion QDR10 Propeller Sizing – Manufactured Choice Menz "Standard" 2-Blade Wood Props 18X6 Propeller $16.00

October 23, 2003Propulsion QDR11 Propeller Sizing – Cruise Conditions Used second modification of gold.m code Held Pitch constant at 6 inches and Diameter constant at 18 inches Assume Velocity = 50 ft/s Varied RPM

October 23, 2003Propulsion QDR12 Cruise Conditions Prop=18X6 Max Efficiency at approx RPM J =.475/rev C T =.0155 C P =.01 Efficiency = 75%

October 23, 2003Propulsion QDR13 Questions? Questions??