Radar invisible car?

Discussion in 'General Science & Technology' started by Communist Hamster, Aug 31, 2005.

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  1. Communist Hamster Cricetulus griseus leninus Valued Senior Member

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    I was wondering if you could design a car in such a shape that it would be radar-invisible, like the F117 or B2, to avoid radar speed traps.

    A bit extreme? Maybe.
     
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  3. (Q) Encephaloid Martini Valued Senior Member

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    Are you looking to break a lot of speed limits?
     
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  5. Blindman Valued Senior Member

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    All materials reflect radiation to some degree. Even the F117 reflect radar and if viewed from the right direction produce a large signature. The secret to low radar signatures is not to reduce the radio reflection, but to reduce the reflection back to the source. A cat-eye road marker is designed to reflect most of the light back to the source, a stealth plane or car would have to do the opposite.

    Take a torch and shine it at a mirror. You will easily see the torch light. No lets create a stealth mirror. Cut the mirror in half and glue it back together in a V shape with the inside angle less then 90". Now shine a torch at it and you will not see the torch refection. In space and from a position directly in front of the mirror it would be invisible even with a 1000watt torch. Strangely stealth materials are usually very glossy in the frequency they are hiding from. This is because diffuse materials tend to scatter radiation sending more back to the source.

    Rules for a stealth car. Absolutely no rounded corners or flat surfaces within 45" of the expected incoming radar or laser source. The surface should absorbed as much of the required radiation as possible. That is, say a red laser is used, then the best colour for your car is blue. Keep your car clean and polished. Dirt, dust and rough paint will increase your visibility.

    I prefer to drive within the speed limit, and respect my fellow road users.
     
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  7. Nasor Valued Senior Member

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    The problem is, cops can still write you a speeding ticket if they visually observe you to be speeding. They don't actually need to get you with a radar gun.
     
  8. Communist Hamster Cricetulus griseus leninus Valued Senior Member

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    Speed cameras use radar though don't they?
     
  9. cosmictraveler Be kind to yourself always. Valued Senior Member

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    They use lasers now also.
     
  10. Avatar smoking revolver Valued Senior Member

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    I have been always wondering (as a non scientist) wouldn't it be better to create a lot of false positives rather than hide a plane (for example) from radar,
    i.e., make the radar believe that all sky is full of stuff.
    Since I have very basic knowledge in radar technology I have no idea if this is possible.
    Maybe scatter a lot of very reflective and small particles from a high altitude which on the radar look like one mass.
    This could be done in places before launching an attack.
     
  11. Odin'Izm Procrastinator Registered Senior Member

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    You get radar jammers that do almost the same.
     
  12. Csel Poiuy Registered Member

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    no, just use radar absorbing paint. I've heard second-hand that some guy at air guard base took some of the paint (which is classified) home and painted some areas of his car with it. So now cops cant pick him up on radar. but usually this causes the cops to get mad and pull you over anyways.
     
  13. erich_knight Erich J. Knight Registered Senior Member

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    Any tech for stealth cars should be banned in light of the new radars being installed as colision avoidance systems in new cars.
     
  14. dzerzhinsky Communist Registered Senior Member

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    The radar is used to calculate your speed so if your car is 'stealthed' they would have no evidence against you.

    Does chaff work?? You could stuff bags of small scraps of aluminum foil in your car and throw them out of the window when cops see you speeding.
     
  15. esoterik appeal h. pylori Registered Senior Member

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    that might work if they are clocking you from behind, which never happens.

    your best bet is to get a FAST motorcycle.
     
  16. Nasor Valued Senior Member

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    Uh...they don't need any evidence. They can just say that they observed you to be speeding and write you a ticket.
     
  17. em... I believe your secondhand friend may have been presuming on your friendship there somewhat - just painting stealth material on a regular car won't make it radar invisible, its aerodynamic shape gives too much in the way of radar refraction to make the paint do diddly - also, the slightest bit of moisture on the cars body equally causes radar refraction.

    Sorry.
     
  18. Roman Banned Banned

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    That stuff would also be highly radioactive. Some air guard fuck would never be able to get his hands on that.
     
  19. SkinWalker Archaeology / Anthropology Moderator

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    The best countermeasure would be to have a small EMP bomb that you could drop from your speeding vehicle that would detonate as the chasing police car came into range.
     
  20. Odin'Izm Procrastinator Registered Senior Member

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    Radioactive... No it wouldnt be. I heard the same story about the air guard, I think its an urban myth though.
     
  21. geodesic "The truth shall make ye fret" Registered Senior Member

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    A friend of mine reckoned he could make his car invisible to radar by making the body out of fibreglass, and coating the inside with radar-absorbing foam. I felt compelled to point out that he couldn't coat his windscreen. He also believed that if he could coat his car in a layer of plasma, it would be radar invisible.

    Not exactly the brightest bulb.
     
  22. Roman Banned Banned

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    I saw an article in Newsweek during the first Gulf War, and there was a picture of a bunch of Iraqis jumping on a downed stealth bomber. The caption read that due to the radioactive material used in stealth technology, the Americans would get the last laugh. Well, it didn't say that, but that was what we were all thinking.
     
  23. CANGAS Registered Senior Member

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    I have discovered, and have been using, with a failure rate of zero, a method of making my car and my truck invisible to law enforcement radar. Since you are all such nice guys, I reveal it to you: I have observed that careful regulation of vehicle speed so that it is within the range of zero minima to posted speed limit maxima, there is no excitation of law enforcement awareness beyond normal background level.
     
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