Could these provide connectivity across SF Bay using mostly existing infrastructure? Enabling a 15 minute SF-San Jose connection would be pretty impressive.
Regent – Electric coastal travel
331–333 of 333 posts
Re: Regent – Electric coastal travel
#332Earlier quoted context omitted.
My sailboat uses radar, I can see things from a good distance away. Let's say 30NM. Surely the plane will do better. But let's say it's going 180mph, or ~160kts. That's 11min from first radar contact to collision. With all that forewarning, avoiding a yacht isn't a big deal. If they can't avoid it, they can stop with 11min warning. Let's say visual only. There will be restrictions on visibility for visual flight rule…
Just for others here, this is very misleading: 1) Sailboats (even moderately sized ones) often do not show on radar at all. 2) 30nm is probably way too optimistic, at a height of 50ft your line of sight is only about 8-9nm. Radar is LOS. 3) 11m is a terrifyingly short time, even if this was all correct 4) you can't identify things based on radar alone, and there's no way you can make out what something is even at 5nm…
> 11m is a terrifyingly short time, even if this was all correct
Is it? How much warning do you get when a car brakes in front of you on the highway?
In 11m you could write a report on how to avoid the collision prior to actually performing the maneuver
Re: Regent – Electric coastal travel
#333Earlier quoted context omitted.
Just for others here, this is very misleading: 1) Sailboats (even moderately sized ones) often do not show on radar at all. 2) 30nm is probably way too optimistic, at a height of 50ft your line of sight is only about 8-9nm. Radar is LOS. 3) 11m is a terrifyingly short time, even if this was all correct 4) you can't identify things based on radar alone, and there's no way you can make out what something is even at 5nm…
> 11m is a terrifyingly short time, even if this was all correct Is it? How much warning do you get when a car brakes in front of you on the highway? In 11m you could write a report on how to avoid the collision prior to actually performing the maneuver
Cars have lanes etc.. it's very different on the water. Hard to tell often if someone is going to hit you or not. Distances are nearly impossible to judge.