In the FTI SCODEV project, the consortium started by defining a system architecture to allow safe scooping. The main components of the SCODEV were defined. For the C-130 aircraft, a scooping design process was defined that is scalable and can be re-used to define the SCODEV for other aircraft types. The aircraft’s performance capabilities are taken as starting point, such that the SCODEV is scaled for safe operations for each aircraft type.
For each of the components, a design was made. Initially the design was tailored to the C-130 Hercules, as this was the intended aircraft early in the project. The main components comprise: a scooping device, a hose to forward the water into the aircraft, a reel to store and deploy the hose, a capture and release system to guide the scooping device safely out and back into the aircraft, and passive and pilot-activated safety systems. When the intended test aircraft was changed to the Leonardo C-27J aircraft, the component designs were adapted to the new aircraft. The design challenge for the scoop is at the edge of physics to deal with the flow characteristics (cavitation, low drag design) and the high loads.
For testing on component level and for helicopter testing, several scooping device and hose prototypes were produced. An iterative design, manufacturing and testing approach was used to reach satisfactory aerodynamic and hydrodynamic properties. Successful aerodynamic tests (stability) and low-speed hydrodynamic tests were performed with helicopters of various sizes (medium to very large). This demonstrated that water can be transported upwards into the tank with only the dynamic pressure (no pumps) of forward speed.
A patent was filed and granted in 48 countries. A second patent is pending. Also a concept was defined for a single engine air tanker type. So three market variants (SEAT, Medium air tanker and large air tanker versions) were defined during the project. Also stakeholders meetings were held with private and government entities in forest fire prone countries: Portugal, Spain, France, Italy, Greece, Israel, USA, Indonesia. All confirmed the game changing potential of SCODEV, clearly demonstrating the expected market demand.