Another Ladybird book question from me I'm afraid chaps. I assume that underslung loads make helis difficult to handle during horizontal motion with their inertia and so on. Having seen the picture below I also wonder what their aerodynamic (non)contribution is. Towed sensor packages for gravimetry and the like are streamlined but obviously this cant be done for a really bulky loads like the one below. However has there ever been any work done on a streamlined cargo container that would make it easier to carry smaller loads over longer distances? Is it even a problem?