The concept of converting human waste into jet fuel might raise some eyebrows, but Firefly CEO James Hygate acknowledges the cringeworthy aspect while also lauding the potential of this resource. Hygate's frank description of the biosolids as "kind of disgusting" but "an amazing resource" underscores the pragmatic approach to utilizing the millions of tonnes of waste that have no intrinsic value.

This device relates to feces and urine elimination cabinets and more particularly to defecation relief devices used by aircraft pilots and other key flying personnel. More particularly it relates to feces and urine elimination cabinets which may find utilization in single pilot driven aircraft.

Comparatively speaking it is an easy matter to provide adequate latrines for the men in the forces on land and sea. When the time comes to eliminate, one just walks to the nearest comfort station. But in the Air Force the problem of elimination can not be always solved that easily especially by aviation pilots...

The applicants are cognizant that there are relief tubes provided on most all jet planes for urinating, but no single seat aircraft is equipped with a safe and sure means for defecation. When the pilot of the jet, due to accident or enemy action needs to eliminate, the problem of defecation becomes acute. The pilot must wait until he lands his craft; and quite often he must remain aloft for a considerable length of time before he has a chance to visit a comfort station on the ground. In many cases due to the physiological and psychological effects produced on the pilot by enemy action, he is forced to eliminate even before he has a chance to land his plane.