Discussion
Question to the BiBs.
From what I've read posted to this forum, the laser beam of a laser speed gun should be aimed at a relatively flat section of the front of an approaching vehicle. This being so, there MUST be some cars,(sports cars?) which offer very little vertical "target area'" to aim at, therefore the beam would be deflected off all other parts of the car rather than reflected back to the laser gun. Can we have a list of the makes and models of cars which are extremely difficult to get a reading off?
From what I've read posted to this forum, the laser beam of a laser speed gun should be aimed at a relatively flat section of the front of an approaching vehicle. This being so, there MUST be some cars,(sports cars?) which offer very little vertical "target area'" to aim at, therefore the beam would be deflected off all other parts of the car rather than reflected back to the laser gun. Can we have a list of the makes and models of cars which are extremely difficult to get a reading off?
quick to get a lock on the back.....I have been thinking about this :
Cars so far that look like they ought to be resistant:
TVRs
200sx.
Loti
Probe
MR2
Mx5
Headlight covers : I have been thinking about something based on LCD welding masks : these are cheap and could be wired with a signal from laser jammer. Not sure if these would be too blatant......
Cars so far that look like they ought to be resistant:
TVRs
200sx.
Loti
Probe
MR2
Mx5
Headlight covers : I have been thinking about something based on LCD welding masks : these are cheap and could be wired with a signal from laser jammer. Not sure if these would be too blatant......
bennyboysvuk said:
(I can't get the Four sideways)
Try a bit harder going into a bend. The lift off oversteer gets it going nicely at which point you can gun it out on the power. Marvellous entertainment.
Ben
Lift-off? LIFT-OFF?
Never.
Seriously, the only time I've got her out of shape she just shuffled power forward and sorted it out again.
I'd like to say it was my innate driving talent that saved the day, but it wasn't.
[quopte=ohopkins] Headlight covers : I have been thinking about something based on LCD welding masks : these are cheap and could be wired with a signal from laser jammer. Not sure if these would be too blatant......[/quote]
'fraid the welding mask works on UV nor infrared ( much shorter wavelength and higher energy )
'fraid the welding mask works on UV nor infrared ( much shorter wavelength and higher energy )
ohopkins said:
I have been thinking about this :
Cars so far that look like they ought to be resistant:
TVRs
Nah, they got my T350 for 41 in a 30. Funny thing though...I was only doing 35. The picture shows the laser had targeted the middle of the bonnet.
Anyway, the vans rear doors and windows were closed and I'm sure you aren't supposed to shoot laser through glass so I'm fighting it.
buckshee said:
cptsideways said:
If anybody thinks they have something that might be suitable I'll test it.
cptsideways,
BMW Z3 M Coupe?
Where are you based?
North Dorset but I get around a lot
However you have a nice shiny grill up front & I gurantee thats a clock from 600 yards almost instantly.
>> Edited by cptsideways on Tuesday 10th August 23:14
I reckon you could build a vey stealthy car. Not just the shape, but the paint (when the F117 was being built they found dead bats in the hangar after the bat sonar failed to spot the tailplane and the poor creatures flew into it), and a particular technology that has been the subject of a now deleted thread on PH.
Radar jammers are illegal but there might be something passive that you could do, I'll try and find an RF engineer who understands such things.
Simon
Radar jammers are illegal but there might be something passive that you could do, I'll try and find an RF engineer who understands such things.
Simon
How about inventing a new bling accessory? The Bonnet Spinner. A thing like the paddle drum off the back of a Mississippi steamboat, made of shiny chrome and/or corner-cube reflective material, mounted in a hole in the bonnet so that the upper half protrudes into the airflow and makes it spin.
I think someone said on another thread that the laser guns don't use a doppler shift ... they measure your distance, wait for a timed interval, then measure your distance again. In effect it is a range finder. Makes spinny things unlikely to work, which is a shame as they'd be blingtastic. On one level this makes them harder to confuse, but it does mean you have a longer window of opportunity to use some kind of countermeasure. E.g. LCD shutter would respond far too slowly to bugger up a doppler shift measurement which would be nigh on instantaneous, but the pause between the range-finding signals might allow an LCD shutter to switch ... or more typically a laser jammer to fire. I don't know how good the laser guns are, but with appropriate notch filters and good detectors you can measure pretty feeble reflections. Stealth isn't easy. Active countermeasures like a jammer are far simpler.
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