Originally Posted by Dogdude
I tried 4s with 7x5 but struggle too much with torque roll
Have you done anything to counter roll on yours ?
The 7" APC sport props that everyone seems to love so much are very heavy. They all suffer from significant torque roll. In fact, nearly all of my launch crashes were related to torque roll on the APC sport props. I eventually stopped using them.
The best 4S and 5S prop for going fast is actually the stock prop. If you want more thrust and you have an 80+amp ESC, get an Aeronaut 7x7. It's an extremely light carbon prop that has no torque roll issues and better thrust than the sport props. I've been using one of them on 4S for over a year now. Pulls a little over 1100w static and is good for not just unlimited vertical, but some very spirited unlimited vertical, and around 120mph level flight. Good batteries are obviously a must.