Trying to get some background for a potential news article about engineering challenges for aircraft fluid (primarily fuel and avionics cooling) systems – focusing on contrasts between designing for UAVs vs. manned aircraft. Engineers I already talked with have mentioned: designing effective avionics cooling systems within a smaller footprint and designing for more demanding mission profiles. Are these two challenges typical for UAV vs. manned aircraft fluid system design? Does anyone have other suggested design challenges that would be of interest? Just trying to make sure my article addresses relevant engineering topics before I invest time researching them. Any insights / suggestions would be appreciated. Thanks!