On Monday, December 5, 2016 at 2:23:59 PM UTC-5, Jonathan St. Cloud wrote:
For the guys with an engine weight does make a difference. Imagine if the 100 pounds of engine and fuel were offset by construction methods that lowered the empty weight of the glider by even 50-70 pounds. YOu would functionally have the same wing loading range as a pure glider.

Jonathon is describing my Apis M 15 meter! Only 500 lbs. total including the engine, prop, starter, battery, etc. Has carbon in the wing spar and other areas.