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Blackbird
Built for Speed
Premium
join:2005-01-14
Fort Wayne, IN
kudos:3
Reviews:
·Frontier Communi..
reply to Link Logger

Re: San Fransisco police getting drones

said by Link Logger:

I have to disagree with you as the reason why motorcycle are involved in more accidents has to do with the speed at which they travel relative to the speed of cars, as they tend to travel faster which means they are constantly moving into and out of blind spots and hence statically spend more time in blind spots then cars. If you and me are driving cars down the freeway, typically we will travel at the same speed (likely over the posted limit), but we will setup such that we can see each other (ie you won't sit in my blind spot). Now motorbikes tend to drive faster then cars means they are passing more cars when means they are passing through more blind spots, hence the majority of the problem (one of the reasons for speed limits)....

The problem is that most motorcycle-automobile accidents occur as simple failure-to-yield types (a car pulling out of a side-street, turning right-on-red, turning across traffic into a side-street/entrance, etc), where subsequently the auto driver states he "didn't see" the moving cycle that he hit. While in some cases, the cycles may have been going abnormally fast, in most cases they were not. Of the six or seven motorcycle accidents involving friends, of which I have some close personal knowledge, every one involved a car pulling onto or across the road directly in front of a legally-operated and legal-speed motorcycle. This is the key reason that (at least at one era in time and in most places) motorcycles were required to run with their headlight on: to at least increase their visual detectability. Unfortunately a single headlight, while it does increase visual detectability under low-light conditions, does little to reveal the nearness or velocity of the cycle. Those perceptions require the light source or object be physically wide enough in the visual field for the eye to discern the rate of increase in size, which is the apparent increase in separation distance between multiple lights or apparent edges of the approaching object. That necessarily requires at least two discernable headlights spaced far enough apart to resolve both at distance. A single headlight or the unilluminated edges of a small profile simply will not provide the visual information in a timely manner.

All of this becomes far more acute in an airborne setting where the closing velocities and the potential directions of approach between objects are much greater (existing in 3 dimensions instead of 2).
said by Link Logger:

Now flying in and around major cities (and hence airports) is always fun as typically there are paths/areas you are required to avoid because of commercial air traffic and if there is a reason for police helicopters etc to be in those areas everyone and their dog gets the messages or they might even re-route air traffic as required (remember Pink Floyd's Pig and the fun it cause over Heathrow). The fun part about drones is being smaller its easier for them to operate lower if needed (or for really small drones lower is the only option), so its easier for them to avoid air traffic....

The problem here is that many, if not most, aircraft don't fly in nicely marked-out corridors at set altitudes, evenly spaced out in-between. Only those under ATC and using transponders can be made to obey such restrictions, and then really only in regions of airport approach. The further problem is that most drone missions require at least part of the flight profile to be at multiple thousands of feet to view an adequate coverage area, only after broad survey lowering their altitude to multiple hundreds of feet or less if needed. The lower the drone, the greater the risk of its detection and some kind of counteraction being taken (if only destroying the "stuff"), as well as increasing the risks of it colliding with birds or being buffeted by the increased air turbulence above local landforms. Unless the drones are required at all times to operate below aircraft altitude minimums (which in most areas are far lower than you might imagine), the potential for air disaster with the increasing use of small drones will only increase until the unthinkable does, in fact, occur.
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“The American Republic will endure until the day Congress discovers that it can bribe the public with the public's money.” A. de Tocqueville


Link Logger
Premium,MVM
join:2001-03-29
Calgary, AB
kudos:3

said by Blackbird:

The problem is that most motorcycle-automobile accidents occur as simple failure-to-yield types (a car pulling out of a side-street, turning right-on-red, turning across traffic into a side-street/entrance, etc), where subsequently the auto driver states he "didn't see" the moving cycle that he hit.

Shoots to hell their argument for requiring LOUD motorbikes for safety reasons.

To pay for these drones they will likely cover then in neon billboards (think Blade Runner), so visibility shouldn't be a problem.

Blake
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Vendor: Author of Link Logger which is a traffic analysis and firewall logging tool