What does "range in saw tooth mode" mean for motorized gliders?

Question

I see the term "Range In Saw Tooth Mode" for motorized, turbo gliders. Can someone explain what it means?

Answer 1

I imagine that "saw tooth mode" means the plane has to "saw" back and forth (side to side like tacking in sailing terms) to gain lift so the direct line of travel under power will be greatly decreased because of this.

Answer 2

The two-stroke engines commonly used are not efficient at reduced power for level cruising flight, and instead must use a "saw-tooth" flight profile where the glider climbs at full power, then glides with the engine retracted.

Answer 3

Sawtooth mode means that you cut the engine, and glide for a while, and when you lose altitude you start the engine and climb back to your desired altitude again.  You use it to extend your range on days when you dont have much thermal updrafts to keep you aloft.