would this work? :)
Discussion
a mate of mine has a decent rc nitro car that does about 45mph.
we want to see if it could get a speeding ticket by going through a gatso full blast. obviously this would be done in the early hours and with lookouts for safety.
what i need to know is will the car (approx 18 inches by 11) be large enough to trigger the radar inside the gatso.
we want to see if it could get a speeding ticket by going through a gatso full blast. obviously this would be done in the early hours and with lookouts for safety.
what i need to know is will the car (approx 18 inches by 11) be large enough to trigger the radar inside the gatso.
The range of a Doppler microwave movement detector is related to the size and shape of the target. A detector that can detect a typical car at 100m will detect a train at perhaps five times that range and a man-target at a quarter (all figures for illustrative purposes only). But a bus viewed from one angle can present a target many times greater than a similar bus viewed from another angle all due to the nature of the reflective surface corners, plane faces, angles, etc. In short, the answer is that theoretically it might detect it but equally it might not. My experience over many years of making and marketing outdoor Doppler intrusion detectors shows that if a detector is mounted high enough above the ground it will avoid 'seeing' small animals because they fall outside the detector pattern when close enough to be 'seen', and when inside the pattern they're too far away.
motco said:
The range of a Doppler microwave movement detector is related to the size and shape of the target. A detector that can detect a typical car at 100m will detect a train at perhaps five times that range and a man-target at a quarter (all figures for illustrative purposes only). But a bus viewed from one angle can present a target many times greater than a similar bus viewed from another angle all due to the nature of the reflective surface corners, plane faces, angles, etc. In short, the answer is that theoretically it might detect it but equally it might not. My experience over many years of making and marketing outdoor Doppler intrusion detectors shows that if a detector is mounted high enough above the ground it will avoid 'seeing' small animals because they fall outside the detector pattern when close enough to be 'seen', and when inside the pattern they're too far away.
:|cyb said:
Unfortunately the Truvelo uses an infra red flash so no visible effects. 
No they don't. Truvelo's have a regular flash behind a magenta filter. They are f
king bright when you set one off (I was 200yds behind a car that set one off and could definitely see the flash with it's distinctive pinky flash).motco said:
The range of a Doppler microwave movement detector is related to the size and shape of the target. A detector that can detect a typical car at 100m will detect a train at perhaps five times that range and a man-target at a quarter (all figures for illustrative purposes only). But a bus viewed from one angle can present a target many times greater than a similar bus viewed from another angle all due to the nature of the reflective surface corners, plane faces, angles, etc. In short, the answer is that theoretically it might detect it but equally it might not. My experience over many years of making and marketing outdoor Doppler intrusion detectors shows that if a detector is mounted high enough above the ground it will avoid 'seeing' small animals because they fall outside the detector pattern when close enough to be 'seen', and when inside the pattern they're too far away.
With that in mind couldnt somthing be done to increse it's visability to the radar? If stealth stuff uses large flat sides, smooth edges and dark colouring would the inverse not be shiny and sharp edges. somthing like wrapping it in that prism style wrapping paper?
motco said:
The range of a Doppler microwave movement detector is related to the size and shape of the target. A detector that can detect a typical car at 100m will detect a train at perhaps five times that range and a man-target at a quarter (all figures for illustrative purposes only). But a bus viewed from one angle can present a target many times greater than a similar bus viewed from another angle all due to the nature of the reflective surface corners, plane faces, angles, etc. In short, the answer is that theoretically it might detect it but equally it might not. My experience over many years of making and marketing outdoor Doppler intrusion detectors shows that if a detector is mounted high enough above the ground it will avoid 'seeing' small animals because they fall outside the detector pattern when close enough to be 'seen', and when inside the pattern they're too far away.
Made me think of:Now concentrate this time, Dougal. These are very small... those are far away...
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