Originally by: Kazuo Ishiguro

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Originally by: Brutor Shaun

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Originally by: Kazuo Ishiguro

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One approach that no-one seems to have mentioned would be to consider the efficiency of afterburners & MWDs, which appear to operate against a frictional force proportional to a ship's velocity, whose magnitude can be worked out. For a ship moving (for simplicity) at maximum velocity, we can make an assumption about the MWD/AB efficiency and from that the amount of energy consumed per cycle can be derived.

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Huh?

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Ok, I'll now try actually applying this, since it does require a bit of work.

The equation of motion, in EVE, for a ship accelerating from rest is

V(t) = Vmax*(1-e^(-t/(AM)))

where A is a ship's modified agility and M is its modified mass divided by 10^6.

Compare this to the equation of motion of a particle falling from rest under Newtonian gravity, experiencing drag directly proportional to its speed:

V(t) = mg/b*(1-e^(-bt/m))

This corresponds to a force of magnitude mg-bv. In EVE, the mg part can be thought of as the thrust of the engine and the bv part is some sort of 'viscous resistance'.

We need to find b, so we equate the above to get b = 10^6/A. We're getting somewhere!

For this example, I'm going to choose a Crow with a 1mn Afterburner II. For simplicity, I'm ignoring skills & other effects (they can be allowed for later in terms of efficiency bonuses).

Without the afterburner, Vmax = 425m/s, A = 3.1 and m = 10^6.
With the afterburner, Vmax = 425 * 1.35 * 1500000/(500000 + 1000000) = 573.75 and m = 1500000. A is unaffected.

Now consider the work being done over 1 metre at maximum velocity in each case. Without the afterburner, work done = force * distance = b * Vmax = 10^6/A * Vmax = 10^6/3.1 * 425 = 1.37*10^8 J

With the afterburner, the work being done is 1.85*10^8 J. So the afterburner is doing 4.79*10^7 J of useful work per metre. It has to use 22 'eve units' of energy every 10 seconds, so in one second (over 425m), it uses 2.2 eve units, and does 2.03*10^10 J of useful work.

Assuming that the efficiency of this afterburner is roughly 20% (feel free to come up with your own figure here), this implies that 1 eve unit is roughly 4.6*10^10 J, or 46 gigajoules.

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Originally by: Lady Caeser

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How about measuring in George Michaels ?

My dreadnought is a Phoenix and has the power capacity of 79,681 George Michaels.

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Originally by: Pilk

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In other news, the computers in Eve are not all that impressive, compared to the power-generation facilities.

--P

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Originally by: Kweel Nakashyn

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Originally by: Winterblink

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Edited by: Winterblink on 10/08/2007 14:01:53
Farads, yes. I would imagine the EVE ones are measured in some sickeningly large denomination of Farads since people use like 5F caps in car stereos so their brake lights don't dim with every beat of the music.

Also I had an instructor in college rig up a tiny cap (say the size of your thumbnail) to a power supply and had everyone move over to one side of the room. The thing blew crap everywhere when it popped, and was as loud as a low-caliber pistol.

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5F is HUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUGE

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Originally by: Arron S

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Edited by: Arron S on 12/08/2007 11:14:43
Volts maybe??

A Video arcade monitor can hold around 15,000 to 25,000 volts

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Originally by: Lady Caeser

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So we have

CPU = Tf (Teraflops)
Powergrid usage Mw (Megawatts)
And then power in the capacitor is stored in... what? units

Anybody know what the prime fiction says on this?

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Originally by: Kazuo Ishiguro

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As for the peak output of a typical ship's capacitor, this is roughly 2.4*cap size/cap recharge time iirc. So for a Raven (without skills etc), this would be 11 units per second, or about 500 Gigawatts; this is equivalent to the *electrical* output of about 300 nuclear power stations.

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Originally by: Brutor Shaun

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Wiggly-Amps.....perhaps?

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Originally by: Maaku

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Originally by: Kazuo Ishiguro

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As for the peak output of a typical ship's capacitor, this is roughly 2.4*cap size/cap recharge time iirc. So for a Raven (without skills etc), this would be 11 units per second, or about 500 Gigawatts; this is equivalent to the *electrical* output of about 300 nuclear power stations.

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Total world electrical power consumption

Since I don't know how the terms map, I'll just ask: Given those numbers, how many Ravens, assuming that they were wired into the powergrid, would supply Earth's electrical usage demand?

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Originally by: Azure Skyclad

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Edited by: Azure Skyclad on 15/10/2007 18:53:43
I don't know if PF mentions anywhere about how the energy is stored. Electrical capacitance is not the only method of storing energy though. Ships may well be packing some of these. Homopolar Generators

One possible alternative at least.



Edit:grammar

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Originally by: Lady Caeser

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Originally by: Roz Akanit

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Useless fact: 35000 joules is approx 8 calories. Which is about 1.5% of the energy in a cheeseless ig mac.

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WTB: Ship that runs on cheeseburgers

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