Jet engines

[monkey10120]

How are the jet airplanes on these airplanes made? I heard of the density motor but I dont understand how it works.

[davidz40]

Density motor work by changing density of some moving object in such way that it's light when moving to one side, but heavy when moving to the other one. This creates unbalanced inertia forces that propel the aircraft.

[StephenAlverez]

Yes, Its not really a jet, since a jet uses difference in pressure to pull air in one area, then the air gets lit with the fuel and gets pushed out another area, reproducing the pressure difference, and pushing the engine forward and restarting the sequence. If you want to see the most basic jet engine in the world, which is possibly the simplest engine in the world, search Jam Jar Jet in youtube. Or take a jam jar and put a centimeter hole in the top and splash some methylated spirits (denatured alcohol), shake it up, light it. No moving parts. These jets, as Davidz40 pointed out, is an inertia engine, physically impossible, except in the wonderful world of Algodoo.

[monkey10120]

Oh I should of ask about just algodoo. I already know how real jet engines work but I cannot figure out how to make them in algodoo. I downloaded some jets where the flames come out and everything and it thrust the plane forward but I dont know how it does that?

Also how are the density engines made on algodoo?

[davidz40]

No flames etc, but simple to understand

reactionles­s thruster

davidz

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[monkey10120]

the lasers change the densities but how does that affect the thrust?

[KarateBrot]

the lasers change the densities but how does that affect the thrust?

physically something like this isn't possible because the mass changes. it affects the thrust because there's no balance of forces. the centrifugal force is dependent from the mass of the circles. so if the mass is bigger the force will be bigger, too. the centrifugal force upwards is bigger than the centrifugal force downwards (or in whatever direction you want to fly). and that's it.

Edit:
i made a drawing
because the force upwards is bigger than the force downwards the whole thing gets pushed upwards with the resultant force.

"high": Area where circles have a high mass
"low": Area where circles have less mass
FD: force downwards
FU: force upwards
FR: resultant force

[Mr_Stabby]

technically speaking the key element of a jet engine is the turbine for which there is no way to represent in 2 dimensions, you could probably create something that looks and acts like one but visual resemblence aside would have nothing to do with a real turbine so whats the point in calling it that

[davidz40]

some jet engines can be built in 2d. (pulsejets, turbocharger-based ones etc). The problem is lack of air pressure in algodoo.