[dcb]

"The technology, which is intended for later use also in large-scale aircraft, will cut fuel consumption and emissions by 25%, compared to today’s most efficient aircraft drives, according to Siemens."

I have not seen any scope limiting statements. And I don't believe this is all so you only have to schlep 6 gas cans out to the towplane instead of 8.

Tip, figure out how to add just enough fuel + safety margin between tows, quickly, to tow the next glider so you are not spending fuel lifting unneeded fuel into the air.