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Reserve requirements could severely limit the true range of electric planes. A plane needs extra capacity to circle the airport for 30 minutes in case it can’t land right away, and it must also be able to reach an alternative airport 100 km (60 miles) away in an emergency.
When you take all that into account, the usable range of a 19-seat plane goes from about 160 miles to about 30 miles. For a larger aircraft like the 100-seat planes that Wright is building, it’s less than six miles.
This Is What’s Keeping Electric Planes From Taking Off
Casey Crownhart
Portland's streetcar succeeded as a tool for increasing urban vibrancy because it was first a tool for neighborhood development. This fact is important for two reasons: first, because it is a mistake to promote a streetcar in the absence of a major real estate opportunity and, second, because such an opportunity suggests the presence of private parties who stand to benefit tremendously from the investment. And these parties should want to help pay for it.
There’s old, and then there’s old – and for urban landscapes increasingly vulnerable to floods, adverse weather, carbon overload, choking pollution and an unhealthy disconnect between humans and nature, there’s a strong case for looking beyond old technologies to ancient technologies.
The Case for ... Making Low-Tech 'Dumb' Cities Instead of 'Smart' Ones
theguardian.com
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