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Aluminium 'chaff' are very thin pieces of this metal which are ejected by an aircraft to confuse the radars and sighting systems of the enemyNot only does it bounce off the radar emissions in different directions, but also keeps floating in the air to act as a blanket against further lock onsDue to its inherent light weight, more chaff can be carried on board as compared with other metals, and being light also tends to float about for a longer period to continue confusing the enemy radars.
Now days, Chaff is actually aluminum coated mylar stripsThey take a long time to float out of the sky, and is used to mask an aircraft from radarWhen radar hits the chaff, the return looks like a huge blob or cloud on the screen, and the operators are unable to pick out the real targetFirst used by the RAF in WWII to confuse German radar.
I think you re talking about Chaff'sThey don't Jam radars exactlyThey create a lot of targets for the radarThese cluster of radio waves bouncing back ( principal of the radar, waves go out and bounce back) create havoc and drive them nutsMissiles wont be able to lock on, AWACS systems will have multiple targets to prioritize etc.
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Police radar? it doesn'tThink about it, aluminum wheels, aluminum heads/ engine blocks components, aluminum body panelsEven Z-06 'Vettes get clocked they're fiberglass carbon fiber bodiesUnless you're driving an F-117A or F-22, they've got you!.LOL! OOPS! I really feel silly, didn't pay attention to the catagory, was in car modeStill made a good response thoughAluminum chaff hasn't really worked since Korea though, AA radar has become a lot more sophisticated since then, ask Gary Francis Powers.
