h a l f b a k e r yI didn't say you were on to something, I said you were on something.
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Powerful magnets under the front bumper
of your
car would pick up nails, screws and other
metallic
jaggy objects, and might prevent you
rolling over
them and getting punctures.
Magnetic Sweeper
http://www.northern...g&cm_ven=Aggregates
with Lever-Action Release System [baconbrain, Aug 23 2010]
[link]
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I disagree with the mfd. The other magnetic bumper ideas in
this category seem to be aiming to prevent collisions by
repulsion, rather than remove foreign objects. And I at least
didn't know about the flightline trucks' magnetic bumpers. |
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You're trying to prevent tyre damage by picking up the puncture kits before they get your tyres, but only a portion of the puncture kits are handled by your solution, so its a fishbone from me. |
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Glass, brass nails and screws, etc., won't be caught by your magnet, and lots of magnet-susceptible items will be just too heavy or fixed to the road surface in other ways (embedded in the tarmac, or sticking up through a large peice of wood, etc.). |
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This is applying a similar principle
(magnetism), but with a completely different
application (picking up nails)!
That is like comparing a lightbulb to a TV
because they both use electricity!
This will not prevent all punctures, but it
would prevent some. This might be an idea
that falls somewhere inbetween completely
useless and 100% infallible, but I not sure
that makes it bad. |
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won't work if you're moving at any decent speed unless the magnets are close enough to the ground to be a danger by hitting something else in the road. [ ] |
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mfd denied: what [MB] said, besides flightline trucks aren't picking the stuff up for their own good. |
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In my experience, I usually get punctures or
drive over debris on slower roads in towns,
so that might help. Also more powerful
magnets would allow them to be mounted a
bit higher... Maybe electromagnets running
off the battery. |
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They'd only need to be mounted directly in front of each
wheel. Also, if they were fixed to the sprung parts of the car
instead of to the body, they would remain at their optimum
position as close as possible to the ground. |
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I am sure I've seen one of these many years ago. I recall thinking that in some cases a magnet wouldn't pick up a nail completely, but simply stand it up into ideal puncturing position. Now I think it might also slide stuff over in front of the tires. |
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Baked, I say, but not well known because they didn't work. (Kinda like those little whistles were supposed to scare deer.) |
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A rooting around the internet finds magnets that can be hung from the front of a vehicle to clean up nails in construction areas, but they feature "2in. ground clearance" and are limited to "3–8 MPH recommended operating speed". (link) |
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This idea would work if magnets were incredibly powerful, but might have some disadvantages even then, including attracting unwanted metal and not removing glass (as said above). |
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I used to work in an factory that got nails into my tires on a regular basis, but I don't think I would buy one of these. |
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So when you stop and switch off the electromagnets, they drop a handful of nails right next to your tyres? |
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Even if they did, when you started again it
would pick them back up! |
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...except those which rolled back under the tyre. |
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You'd have to remember to park facing
downhill. |
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"Careful, don't stand by my tires, it will magnetize your watch" (+). |
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If the magnets aren't directly in front of where the tire will roll, but instead one on each side of where the tire will roll, it won't matter if the debris is dropped when the electromagnet is turned off, because it won't be dropped in front of the tire. |
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neither would it pick up in front of the tyre... |
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Unless you plan on using magnets so strong that they can collect a nail from 8" away while travelling at 30 mph. Parking close to dustbins, other cars, etc. would be entertaining. |
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This was also mentioned on Top Gear, they had little model cars with magnets mounted on them so that the North pole of one car's front magnet would repel another, but it was a farce of an idea as usual. Then someone from the crowd shouted out about how it would pick up screws and nails. |
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