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This is for high speed car chases. Fast moving cars need oxygen to burn gas. I propose that a compressed gas bomb could be deployed so as to remove the oxygen necessary for internal combustion, killing to car engine. Any non-oxygen gas could be used for this: CO2 or N2 for example. The bomb would
be deployed in front of the speeding car, perhaps launched there from a cannon or placed ahead and remotely deployed like a roadside bomb. The air intake of the car would not get enough oxygen or so I assert. When the engine died, the driver would not lose control of the car, making it a safer way of stopping than spikes / tire destruction, physical restraint.
The driver himself has a supply of oxygen in the vehicle cab air and so would not be put at great risk by the gas cloud. In the event that the driver did have a lack of oxygen and passed out, he would be rescued by pursuing law enforcement personnel.
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Insert reserve compressed oxygen tank to thwart inert gasses of policefolk. May also help cure drunkenness before driving. |
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Car is doing, say, 100mph. Let's assume that it can coast
quite happily for 10 seconds after the engine cuts out,
before it has slowed down sufficiently for the police to
intervene (say, to 50mph). That means it will have to
travel for about 300 metres through the gas cloud. If the
cloud is any smaller, the car will coast through it, come
out the other side doing 50+mph and then restart. |
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So, we need to create a hemisphere of gas 300m in
diameter. That's about 7 million cubic metres of gas. If
we use, say, nitrogen, that is 7,000 TONS of gas. |
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Therefore, it seems pointless to worry about the other
problems inherent in rapidly displacing a 300m hemisphere
of air. |
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Always, always do a little sum before posting. |
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I assumed one could not restart a car coasting at 50 mph. Can it be done? Assume an automatic transmission. |
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the tranny will automatically move into top gear when the engine's rpm drops way down *and* the clutch will unlock... so I don't think an auto tranny car can be bump-started at all unless you've hotwired the engine computer. |
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A fuel-air explosive device would do the trick, though anyone in the vicinity is not gonna be much chop after it's been deployed. |
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the Mythbusters once tried attaching CO2-extinguishers to the front of a speeding car, to stop the motor through lack of oxgen... a less than successful venture. And if the baddy makes his getaway in a Prius... |
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If the baddy makes his getaway in a Prius, you should have no problem jogging after him, opening the driver's side door, and hauling him out of his seat before he ever gets a chance to get up to speed. |
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"...I don't think an auto tranny car can be bump-started..."
Shift the car into neutral, start it, shift back into drive. |
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Just don't slip it into Park. There'll be a bang, as the parking safety pin, or parking pawl, snaps off and proceeds to trash the transmission. |
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Why would an automatic transmission 'de-clutch' at speed? While the engine is still coupled to the wheels, it is kept spinning at high rpm. |
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Only when the car's speed drops so low that the engine approaches idle rpm will the drive disengage. |
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If this were not the case, automatic transmission cars would have no engine braking whatsoever. |
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Does your engine rpm drop to idle when you lift off at 50MPH? |
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All that aside, rather than try to asphyxiate the engine, why not try to poisin it? |
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Modern vehicles with catalytic converters and Llambda sensors are certainly sensetive to fuel additives. Is there perhaps a gas or vapourised fluid which could upset the system enough to stop or severely slow the engine? |
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/poison it/
I was thinking of something like cyanide, which poisons oxidative respiration. I worry that anything which could poison combustion would be very tough on the driver. |
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Re fuel/air explosive - I imagine that tanks get things like these dropped on them. Does it kill the engine? |
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// why not try to poisin it//
sp. "poisson" Yes, drop loads of fish on them. |
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