Florida's XTI Aircraft has ben working on its TriFan eVTOL concept for at least five years now, and while a passenger version is still the key focus, the company has now put forward a long-range, autonomous diesel-hybrid cargo variant.
Partnering with Verdego Aero, XTI says it'll be able to build in a 180 kW generator running on Jet-A to feed the TriFan's high-power battery pack, giving it the ability to carry a 500 lb (227 kg) payload over a distance of 230 miles (370 km). While no max cruise speed is listed for the cargo plane, XTI says the TriFan 600 six-seater is rated for 345 mph (555 km/h), or about twice the speed of a conventional helicopter.
One advantage of this design is its ability to save energy by taking off and landing on a runway where there's one available, or switching to VTOL to land in a field, on a yacht or a helipad where the mission calls for it.
Disadvantages would include the fact that although it's cleaner and more efficient than a turbine powertrain by some 35 percent, it's still not a zero-emissions electric. And the fact that the airframe runs only three fans, which not only severely compromises its control authority in a hover – it also means there's no redundancy to fall back on if you lose a motor.
That's going to make the TriFan 600 very tough to certify as a commercial passenger aircraft, so perhaps using the platform as an unmanned cargo drone might provide a more realistic way for this design to get airborne in a useful way.
Check out a video on the TriFan 600 passenger aircraft below.
Source: XTI Aircraft
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It is important to notice however, all existing limitations of the aircraft's flight envelope (vertical lift performance, top cruising speed) come from one source: the rotors & blades. Use of composites and hi-tech manufacturing shall not cover up the actual level of rotor-sophistication, which is exactly that of the Wright brothers’ propellers.
The company that advances first in that direction (i.e. manages to exceed present level of fan-sophistication) most probably will win the eVTOL race.
Hydrogen, on the other hand, does NOT start fires but EXPLODES like a bomb!!!
If there are hydrogen vehicles around, do you seriously think their tanks would never leak or rapture, because of a traffic accident, for example???
IMHO, any land/sea/air vehicle which battery does not provide enough power/range should/must use bio-diesel as (range extender) fuel!!!
(Bio-diesel can be produced from many kinds of crops/biomass & can be used by any regular land/sea/air diesel vehicles too!!!)