Re:The High-Stakes Race to Build the World’s First Flying Taxi
by gambiting on Tuesday November 05, 2019 @02:41PM
(#21455888)
Why? Imagine a vehicle that in practicality performs the exact same job as a helicopter, has the same or actually worse failure modes than helicopters(helicopters can at least autorotate, most proposed "flying cars" can neither glide nor autorotate) and now tell me why would such a vehicle have any lower maintenance requirements? Sure it might use an electric motor instead of an engine, but surely safety would require the exact same maintenance regimen as an actual helicopter. This is not going to be a car that you can bring for an inspection once per year, pay £30, change some oil, cabin air filter and be done. It's going to be as costly as any other air-worthy machine to own, in which case any kind of comparisons to a personal car are frankly out of the window, and anyone who thinks they could build a business around one could build a business right now using existing machines. That's not to say that innovation shouldn't happen, quite the contrary - but the whole talk of "flying cars" for your Joe Shmoe is just a pipe dream.
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Re:The High-Stakes Race to Build the World’s First Flying Taxi
by starpilot on Tuesday November 05, 2019 @04:41PM
(#21457017)
Just getting rid of metal structural components would be a huge boost, that's why the Cabri G2 has zero life limited parts while the R22 has... many. The state of civil rotorcraft is analogous to that of commercial jets 25 years ago. All metal parts, little to no computerization. This isn't inherent to flying cars vs. conventional helicopter configurations, just due to the extremely risk-averse nature of the rotary-wing industry. Helicopters today are very under-optimized but still work pretty well. Think of how shitty old cars were in mileage and maintenance, but still got the job done, while new cars typically last over 100,000 miles.
Re:The High-Stakes Race to Build the World’s First Flying Taxi
by alistairSH on Tuesday November 05, 2019 @04:01PM
(#21456637)
Just to be clear, the VTOL in this article appears to be a light-sport aircraft (LSA) with a canard wing configuration. I assume it can glide like a normal LSA, though I won't swear to it. It is not an oversized quad-copter.
That said, if it is an LSA, at least in the US, it would have to meet the normal LSA or E-LSA regulations. Including the service schedule, which is less onerous and non-LSA general aviation, but still far more than a car.
Re:The High-Stakes Race to Build the World’s First Flying Taxi
by marcosdumay on Tuesday November 05, 2019 @03:32PM
(#21456356)
> Why?
As people already pointed, redundancy. Those systems have a lot of engines.
The simplest ones have fixed engines, and the most complex ones have then engine move in a single axis. Both are much simpler than an helicopter.
Electrical motors inherently require less maintenance, what isn't as large a change as it seems.
All the e-VTOL designs I have seen can glide, what places them on the same category as airplanes, that require much less maintenance than helicopters.
Re:The High-Stakes Race to Build the World’s First Flying Taxi
by starpilot on Tuesday November 05, 2019 @04:43PM
(#21457035)
> Both are much simpler than an helicopter
They are mechanically simpler, but aerodynamically and electrically vastly more complex. These designs are only possibly due to modern engineering, otherwise they would have been invented before the helicopter.
Re:The High-Stakes Race to Build the World’s First Flying Taxi
by marcosdumay on Wednesday November 06, 2019 @10:03AM
(#21463232)
It's mechanical complexity that brings unreliability and high maintenance.
Electrical complexity is more reliable by orders of magnitude, and aerodynamics won't fail mid-flight.
Re:The High-Stakes Race to Build the World’s First Flying Taxi
by fiter on Tuesday November 05, 2019 @03:01PM
(#21456052)
I can think of some reasons: (1) redundancy, (2) economies of scale, and (3) changed regulatory regimes.
Re:The High-Stakes Race to Build the World’s First Flying Taxi
by edmundhuber on Tuesday November 05, 2019 @03:25PM
(#21456282)
The flying car designs I've seen have no true redundancies. They look like they would be dangerously unstable if they tried to run on fewer than all motors.
Re:The High-Stakes Race to Build the World’s First Flying Taxi
by FabHK on Tuesday November 05, 2019 @06:26PM
(#21457995)
The Volocopter has 18 rotors (fixed, electric motor, with 1 degree of freedom - doesn’t get much simpler) attached to 9 battery packs, and at least 4 can fail (even more when they are “nicely” distributed) and it's still controllable and landable. And they could still throw in a ballistic rescue parachute.
Re:The High-Stakes Race to Build the World’s First Flying Taxi
by gambiting on Wednesday November 06, 2019 @06:00AM
(#21461378)
Unless of course the power supply fails, in which case we're back to the point I brought up earlier - you have neither autorotation nor gliding to fall back on, the vehicle just falls out of the sky like a brick - the parachute would help but I'm not sure how feasible that is.