RE: Best prop angle for 1/8 scale hydro
I was hoping someone would chime in, no luck on that one apparently. Here'e my take on it so if anyone want's to add to or give other thoughts, go for it.
First off prop angle(aka thrust angle) isn't the only thing in which you need to deal with. Prop depth is just as much of a factor. As a general starting point, I'd go with a flat thrust angle with the prop centered at the depth of the sponsons. There are several reasons for this:
1) a flat thrust angle means the prop's thrust won't be influencing the boat's running characteristics
2) a flat thrust angle will give you the most speed as well as show the need for a lifting or standard prop
3) a flat thrust angle will show if the hull as other issues with balance, sponson angle of attack, etc
4) centering the prop at the sponson depth will, if everything else is set up correctly, give the boat the closest to level ride it's going to get.
After the first few runs, making small adjustments (changing props, prop depth, changing thrust angles, etc) can be tried to "dial in" the boat's ride for best speed and handling