On Monday, 4 May 2015 10:37:09 UTC-4, Dan Marotta wrote:
...Because the FAA version is (gasp) wrong!



Dan

Think about it... if the glider flies out to the far right, it drags the towplane's tail to the right, thus pointing the towplane nose to the left... causing a left turn.

Hence, the FAA version is wrong.

Tom Knauff has been (unsuccessfully) trying to get the FAA to correct the numerous errors in that book.