I know very little about flying (but am working on that) however (with head held low) I do know just a little about speed enforcement (and thats the only hint I'm giving)
A couple of thoughts spring to mind,but do correct me if I'm wrong
All Police helicopters are shared with the local ambulance service and budgets only allow a certain number of flying hours per year.A twin engined machine full of all the goodies and an experienced pilot costs what an hour to run? and an endoresable fixed penalty (speeding ticket) fines the unfortunate soul £60 and thats before any administration charges for processing such ticket are incured.
Job hellies use a time/dist device and for reasons I can bore you with if anyone is interested your chances of actually getting caught by the eye in the sky to my mind will be f*** all less one thousand.
My force use a helicopter, in 8 years I don't know of it ever catching a speeder.its been used to video some being pursued by other ground units, but again total use down here of in car video systems has almost negated that use as well in all but the most densly populated areas
Think its hype.Greatest cause of rtc's is normally 'inappropriate speed' as opposed to 'excessive speed'
I read lots of 'tabloid theories' on how technology is attacking speeders most is misinformed propoganda.
There is a trial on forces receiving a portion of the fine. That portion was always only to cover admin costs so that it would cost an individual force no money to prosecute. Revenue wise its worth too much to any government to wave big sums of money away.
If anyone wants the hands on info on current systems then i'll happily tell, i believe in a level playing field.
In my defence I have seen the light and am in the process of moving away from 'the dark side'
I'll shut the door on my way out
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It went Earth,Sky,
AMBULANCE