Originally Posted by luke352
What brand prop are you using? Torque roll effects really have as much to do with the weight of the spinning disc as the diameter. So you may find an APC 13x6.5 would have more torque effect than say a Xoar or Vox 14x7, since they are a lighter prop.
Actually the weight of the prop makes no difference at all to how much torque there is. It's the motor that produces torque, not the prop
A heavier prop may produce more gyroscopic effect (gyroscopic procession) and may be a little slower to spool up.. but torque wont change.