In case you are just curious about the headline:<p>> Their latest test aircraft is known as the “flying piano” because of its poor gliding characteristics.
I don't get how this can be more efficient than just making the towing plane slightly larger. Adding a 2nd plane will surely just add additional drag, even if it glides 90% of the time.
If you can't maintain separation you can't be in class A. Gliders only ever get special clearance in particular areas to even enter class A. Where are they going to fly this thing?