I don't know if this is the right place to ask, but I am looking for lift-to-drag ratios (L/D) of different airliners. I have found a paper  which has some estimates of L/D for some jetliners, but it's a limited sample Table 3. Estimated aerodynamic characteristics of jet airplanes (L1011, a few Boeing, Douglas and Airbus). This question also looks promising, but delivers airfoil numbers, not aircraft numbers, sadly. Is there any online resource or a place that might point me in the right direction?
 Historical evolution of air transport productivity and efficiency Rodrigo Martínez-Val, Emilio Pérez and José F. Palacín Universidad Politécnica de Madrid, Madrid, Spain, 28040