Hi I am looking into the design of gliders with good L/D / Glide Ratio. It seems hard to find what is the most efficient full size glider, and the same goes to a scale r/c type one too. So any ideas? If i was to start from scratch, what should i be looking at to get the best l/d ratio possible? The AIM is to get the most airtime and/or distance. I read in a book that speed has little effect on the L/D ratio, is this true? If so, is this only true down to a certain speed, ie, stall speed? Project needs to address to if the aircraft can be used with a powerplant. Is the use of a glider for adaption to a low power, and long distance aircraft better than building an aircraft from scratch for this purpose? My area of study is Mech Eng, but I want to get into Aero Engineering after graduation, and i have an interest in fluids and aviation in general, thus having an Aero themed project to try get some knowledge about Aero Engineering.