A University of Baja California (Oceanographic Research Institute) required us (mRo) to develop a fix-wing UAV. It had to be small/portable, and capable to carry a multispectral camera that will be used for oceanography research. The camera would be a Parrot Sequoia. And of course… it had to be very cheap due to budgetary constraints.
Is well known that 90% of the hardware production/quality issues are related to pasting performance. For those unfamiliar with the topic; pasting is the process of adding a special “solder paste,” which is basically a mix of tiny -micrometer size- metal balls and flux which can be applied on the PCB using a “stenciling” method.