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Can we increase and decrease the density of an object using electricity?

I was just wondering if its possible for flux fields to be harnessed in a way that the field around an object lets say a plane would lower the outside density around the aircraft and allow the plane to move faster.

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    Sep 24 2013: Yes ! you can, if you can have the control over more subtle thing than the target one. suppose you want to change the density of an object A and a is nothing but a unity of many relational other objects B. you must have the control over B to change A... :)
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    Sep 22 2013: For more information about putting the use of this idea into aviation you should look into density altitude. Basically what it is in this idea (allowing the airplane to move faster) ... there is a sacrifice for an aircraft on either end of lowering or raising the density around the aircraft. Like a liquid, gas is also a fluid. Imagine fluid (matter) as marbles. In a container the marbles are right next to each other, side by side. This is an example of fluid as a liquid. In gas state imagine the marbles further apart extended and suspended further from one another in this container. Air density is like this but on a microscopic scale. Under normal temp. and pressure as altitude is increased the pressure (density) is decreased. So, if the marbles are extended further apart with altitude increasing, thrust is decreased if power settings remain the same because there is less "bite" (marbles/matter) for the prop or jet to advance forward. The engine and airfoils (higher angle of attack/increase drag) have to work harder. A benefit of flying at a higher altitude is better fuel economy because you are mixing less fuel with less air (subsequently, this also is a trade off with higher engine temps. in a confined area). The first jet aircraft fighter (German) had an engine time of only 50 hours before a tare down and rebuild.

    Good thought though. Maybe if you could remove the density from certain areas (more than one) and put it where exactly needed you maybe on to something. Hell, maybe even controlling the weather (greater cause).

    To keep it simple... this is the reason why we can not swim in air but can swim in water. It works the same for aircraft. Would you give up 25 years of your life for the amount of energy required for you to swim in the air for 5 minutes? ;) Aviation is expensive but airframes do not depreciate like cars.

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  • Sep 21 2013: I think the answer is not practically.

    Density -mass/volume. Mass will not be changing if we keep this out of the realm of nuclear events. Volume though you can change with heat. The change depends material properties, but in general is pretty small.

    Keep in mind that any field you generate around an airplane has to be generated by something inside the airplane. Devices that generate large fields tend to be big and heavy. Big and heavy objects reduce payload and airspeed, so your goal of making the plane faster might be thwarted by the overall effect of the device.