But the design company Hermeus is still building its first unmanned combat aircraft, the first prototype of which was unveiled last week. Hermeus is planning to create the world’s fastest reusable hypersonic aircraft, intended for military use and passenger transport. The unique propulsion system of the Quarterhorse means that it will not need to be lifted into the air by a carrier aircraft, as is the case with NASA’s aircraft.
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In essence, they would create an environmentally friendly alternative to the current fossil fuels, especially for maritime transport and aviation. This solution could be even better than hydrogen alone, but there are still some question marks.
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Irish company ASL Aviation Holdings has reached an agreement with companies developing zero-emission solutions to convert ATR 72s to hydrogen-electric propulsion.
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After successful tests, several Cessna models have been adapted to run on less polluting aviation fuel. Now, operators of Textron Aviation’s Cessna 172 Skyhawk and 182 Skylane models can refuel with 91- or 94-octane unleaded or 100-octane ultra-low-lead aviation gasoline.
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In a few years’ time, flying taxis will be able to meet passengers at London Heathrow airport. While infrastructure issues remain uncertain, a number of test flights are being carried out. An air taxi service at London Heathrow Airport could be launched in a few years’ time, following an agreement with Vertical Aerospace Group to roll out the service. However, the airport is still conducting a number of studies on the infrastructure.
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A growing number of companies are developing eVTOLs, or electric-powered vertical take-off taxis, the BBC reported. A report estimates that by 2040, 430,000 such vehicles could be in circulation worldwide.