rcplane,

To make it simple an Immelman and split Ess has no line between the loop and 1/2 roll. A Cuban, Humpty, and sharks tooth, neede a equal length line before and after.

PS: Food for thought...Equal length sometimes depends on the judge, a lot of judges(even proficient ones), count the seconds to fly the line before and after, equal time does not always mean equal length.

Dan Powell