Pilot union urges FAA to reject Rainmaker’s drone cloud-seeding plan

Rainmaker Technology's initiative to utilize small drones for cloud-seeding operations is facing significant pushback from the airline pilots union. The Air Line Pilots Association (ALPA) has called on the Federal Aviation Administration (FAA) to deny the startup's request unless it complies with more rigorous safety standards. The FAA's upcoming decision will be pivotal in determining the future of weather modification through unmanned aerial vehicles. The ALPA expressed concerns that Rainmaker's application does not sufficiently prove its safety measures and poses what they describe as an "extreme safety risk." Rainmaker is currently seeking an exemption to regulations that prohibit small drones from transporting hazardous materials. After filing its request in July, the FAA responded by asking for additional information regarding operational protocols and safety measures. In its proposal, Rainmaker plans to use two types of flares on its Elijah quadcopter to disperse particles that encourage precipitation. This drone is designed to operate at altitudes up to 15,000 feet, which overlaps with controlled airspace frequently used by commercial airliners. Drones must obtain permission from Air Traffic Control to operate in this zone, although Rainmaker's petition states it intends to function in uncontrolled airspace unless otherwise permitted. The ALPA has raised further questions about the specifics of Rainmaker's flight operations, citing a lack of clarity regarding potential flight locations and altitudes. Concerns have also been voiced regarding the flares, particularly the risks posed by foreign object debris and fire hazards. The union points out that the proposal lacks trajectory modeling and any assessment of the chemical agents' environmental impact. Despite these objections, Rainmaker asserts that its operations will be conducted over rural areas and on lands owned by private partners with whom they have established strong relationships. Cloud-seeding practices are already in use across the Western United States, typically involving piloted aircraft that collaborate with state agencies. These operations are often commissioned by ski resorts and irrigation districts to enhance snowfall and bolster water supplies during spring. The concept of cloud seeding dates back to the 1950s, wherein scientists discovered that by introducing specific particles into clouds, they could effectively induce precipitation. Silver iodide is commonly used due to its structural similarity to ice crystals, which facilitates the freezing of super-cooled water droplets and promotes the rapid formation of ice crystals. Rainmaker's innovative approach—conducting these operations via drones rather than traditional aircraft—could ultimately enhance safety. The company highlights that its flights will be closely monitored by remote pilots and trained personnel, with additional safety protocols in place. The FAA's decision regarding this proposal will not only impact Rainmaker but could also shape the future landscape of cloud-seeding technologies.