Team 5 – Propulsion QDR #2 Scott Bird Mike Downes Kelby Haase Grant Hile Cyrus Sigari Sarah Umberger Jen Watson November 20, 2003 Propulsion QDR #2

Preview Modification to gold.m New Propeller Choice November 20, 2003 Propulsion QDR #2

Which plane are we talking about? Tail Dragger Flaperons Pod Tractor Engine November 20, 2003 Propulsion QDR #2

Propeller Sizing – Sizing for Take-Off Updated chord distribution in gold.m Used modified gold.m code Varied Pitch and Propeller Diameter Max HP at RPM = 9000 November 20, 2003 Propulsion QDR #2

Updated chord distribution in gold.m 0.7353 inches 8.17 inches Divided picture of propeller into tenth of a Radius sections Red box is 9% of the Radius (default in gold.m) Yellow boxes were measured at each tenth of a Radius November 20, 2003 Propulsion QDR #2

Updated chord distribution in gold.m Chord length of each yellow box used to calculate c/R for each 1/10th of a Radius New chord distribution put into MATLAB code Modified gold.m ran to find new propeller November 20, 2003 Propulsion QDR #2

Choosing a new propeller (again!) Propeller Choice: 19x5 OR 18x6 November 20, 2003 Propulsion QDR #2

Propeller Sizing – Manufactured Choice 19x5 – DIFFICULT to find on market Zinger 18x6 Pro-Zinger Wood Propeller Price = $18.99 Material: Wood http://www.towerhobbies.com November 20, 2003 Propulsion QDR #2

Updated chord distribution in gold.m New Propeller: Summary Updated chord distribution in gold.m New Propeller: Zinger 18x6 Pro-Zinger Wood Propeller Next Steps for the Propulsion Team: Verify takeoff and cruise conditions with new propeller ITERATE as other values change (yay!) November 20, 2003 Propulsion QDR #2

Questions? Questions?? November 20, 2003 Propulsion QDR #2

Choosing a new propeller (again!) Some of the larger diameters will not work at all! November 20, 2003 Propulsion QDR #2

Choosing a new propeller (again!) November 20, 2003 Propulsion QDR #2