I have been using the original (now apparently unavailable) 11 x 5.5e thin hub/blade props from APC since last spring (when I first started flying electric). The motor is an Arrowind 2820/07, and the plane is a Brodak/Smith Vector .40 that weighs 48 oz with battery. Motor run time is approx 5:30. Using the older "thin hub" props, Lap time was 5.3 seconds with the motor set at 9200 rpm. I had been using from 1350 to 1450 mah from the battery depending upon wind. Yesterday, I switched to a prop that I purchased a few weeks ago that has the thicker hub. Battery usage stayed about the same, but lap time dropped to almost 6 seconds. I repitched the prop to the same pitch I have been setting my "new" 12/6e props on another airplane, and the lap time is now 5.2...very close to what it was with the "thinner" version of the prop, but the battery draw has gone up to 1800 to 1850 mah. Just thought I would share with the group.
Bob Redmon