Even though aeroplanes are still largely grounded, that suits Justin Perry, of Frequency, which is also raising funds. He and his co-founders, all pilots, developed an aviation communications product designed to replace the eight forms of communications used in cockpits. Some, such as VHF radio, are 100-year-old technologies, while other communication is of poor quality. “It’s crazy. It’s why passengers behind us on their mobile phones can often find out about the reasons for delays before we do,” said Perry.