Skywalker, I did not loose any speed with the Indigo when changing from a 13 X 8", which has about the same "area" exposed. My prop runs in the open not behind anything. If you can tuck the 2 blade behind it is less drag. Remember the Indigo is quite small at 10" diameter and with the "seconds" you gain with a 3 blade rating may just offset the speed and make a gain for you, it did in my case.
Dave Neptune
