21 x 14
I change from APC 21 x 14 (13) in the last competition and find out that this propeller gives more power in uplines and brakes better in downlines. In my opinion a really good propeller for a decent price. I checked out the balance and it was 100 % correct right out of the box.
Ordered a set for my TWM Impulse XP and they work great, exactly what I needed and perfect for any 2m F3A model. Plenty of clearance on the APC-e 20x10 prop as well. A pleasure to deal with, quick responses to emails and UC arrived the very next day, many thanks!