Originally Posted by 5263
That may be common for when you deal with sidespin as the primary rotation,
But we are not talking about a pure type sidespin, but more of a side aspect to
something like the canted axis for the earth.
I specified several times from the hitter's perspective.
Maybe to make it simple for you, we can address it as which way it will curve;
tail off to left or right.
Nadal's lefty I/O Fh will tend to tail off to the left.
Fed's righty I/O Fh will tend to tail off to the right.
Does that make sense to you?
There is no need to invent new rotational terminology. Everything about that was defined hundreds years ago. In general, I explained the matter in thread http://tt.tennis-warehouse.com/showthread.php?t=436086
. The most complicated case, Twist serve, I described in article http://tt.tennis-warehouse.com/showthread.php?t=440128
. There are also hundreds of SystemicAnomaly posts about this topic.