APC prop hub numbers???
I was told on this forum to go to a APC prop over the MAS and it was great advice. One thing I would like to know though is what does the number on the hub of the prop mean. Most of the ones I buy have C-2 but I needed a 9-8 and bought one at the hobby shop and went to put it on at the field and noticed it said C-1. Looking at it I saw that it had a different sweep to it. What does these numbers mean?