Next SPB project?
Once LOHAN has reached her climax, could the geniuses at the SPB perhaps look at developing a full-fledged nuclear-powered launch vehicle. It can't be that difficult...
NASA has conducted tests of a nuclear reactor intended to generate electricity in space for the first time since 1965, offering hope that humanity may now belatedly get serious about building proper, powerful spaceships of the sort long envisaged in science fiction. The space agency has just announced the tests, conducted by …
Oh, and violate the Law of Conservation of Energy? Where does the energy come from?
Anyway, the DUFF doesn't answer one very important question, and one which has likely stymied all non-chemical rockets for decades: What are you gonna use for reaction mass? To date, we've yet to develop anything resembling sci-fi's pure-energy propulsion, as there remains the infamous "underpants gnomes" step (IOW, ?????). How do you convert the electrical energy into kinetic energy? The only we know how is electromagnetic propulsion, and THAT requires a reaction mass. Furthermore, if Newton has anything to say about, it's gonna either a lot of mass OR a lot of energy (probably somewhere in between) to accelerate and decelerate a manned spacecraft to and from any reasonable fraction of c.
i said it all a million times,.
6mw from 20 rpm = 300,000 watts from every full rotation when a dynamo is at maximum output, a electric motor will not use 300,000 watts to power it as watts = electro magnetic calibration, the everyday common motor is either
high RPM and low torque or low RPM and high torque, to turn a dynamo is low RPM and low torque with a motor calibrated specific to the dynamo
you just use a solar battery cell to start them up or the national grid
im a looser and dont have £1000 for a 1+ kw wind turbine with full battery and transformer, and a good regulator to control the watts to the motor that is not made for its use you get from a industrial electricians shops made for a factor machine or power drill
the input watts to the dynamos battery is that of the RPM output, you just loop back in a primitive setup 90 watts, and have the rest being stored in the battery on every full rotation
if you have 300,000 watts from every full dynamo rotation, and the motor used 1kw for every of its RPM, you still have 299,000 watts to power the battery or full circuit grid
if you want to power a spaceship, you just need your everyday domestic wind turbine kit you will have in your loft, and a power drill motor to turn the direct drive dynamo instead of the wind, a power drill motor has plenty of extra RPM and torque then you actually need and can give you a constant 10kw with ease
if you put it all in a cylinder, the battery just becomes a battery cell, you can replace and charge up using solar power, and can power mars and every thing else
you can make find farms worth while, or just make massive turbines the size of houses, its all just math, AC and volts, once you know the torque the dynamo needs at its maximum output RPM
the space shuttle size craft would only need 10kw, if you want a settlement on mars you can happily start off with 1 or 2 MW, for lights of planets, and making oxygen if a good source of water is found like nuclear submarines
domestic kits include the wind turbine, that generates the electric, the electric gets stored in a battery, the electric stored in the battery goes through a transformer, before it reaches you house circuit for your green power use
you can put it all in a 2 litre trash can size cylinder, if you have a motor on top driving the direct drive dynamo
I think I see where you're coming from, but it's utterly wrong. You've seen a 2MW generator and thought "hey, if I spin that shaft I'll get 2MW!" then thought "Hey, you know what spins really well? An electric motor."
Unfortunately the electric motor will have to put more than 2MW of power into the dynamo to get 2MW of power from it. This is because as you spin the rotor of the dynamo the resistance to movement builds up more and more; spinning the dynamo shaft inside the coils of the dynamo creates a magnetic field which acts against the motor you're using to drive the dynamo shaft. You can't get rid of this field; it is this magnetic field growing and collapsing that pushes the electrons through the wire and so creates an electrical current.The faster you spin it the more resistance there is.
If you think you can do it, build a smaller model. Even a model that produces no excess power but spins itself forever would be worth approximately all of the money in the world. You would become an overnight billionaire, worth substantially more than the oil companies who'd really not like you (but to whom you would pose little immediate threat). Maplin or RS (or even eBay!) would be able to provide you with an appropriate motor, dynamo and other components to give it a go.
electric motors do not have shaft power and why they are the only kind of motor that can turn massive axles, and why aircraft carriers need to be nuclear, while all other ships use diesle generators
the input watt powers the electro magnets, the calibration while depend on what
the motors RPM and torque is
"you can generate a constant 10kw using a 12v powerdrill motor with RPM and torque spare if passed through and controlled with your regulator"*
a) Eight years old.
b) On drugs.
c) From a differnet universe that doesn't have a "conservation of energy" law.
Please study some basic physics and then come back and apologise.
* If your 12V motor is running at 834 Amps and your generator is 99.99% efficient then you *can* generate 10KW but you use 10.0008 KW to do it; a net loss of 0.0008 KW. Ye canna' change the laws of physics!
there are no laws of physics, different dynamos generate different ac/dc and volts, if your a professional electrician or make nuclear reactors or have a general understanding of modern dynamos and know why they cost £5000 instead of £8 for bike lights and radios, you can probaly make a crude generator in a hour
when you put some extra money in and make motor specific to the dynamo, they can power ships and planes and national grids and spaceships
if you want absolute minimum loss of power looping back to the motor, there is different types of grease and gases to put in a vacuum container cylinder, the math is all the same and none of that matters much if you can generate 10kw with a 12v power drill motor
Thing is, that number gets CLOSE to zero, BUT--and this is the important part--it NEVER REACHES zero. Without that, you can't approach perfect efficiency, and without that, you're going to lose energy, full stop (as efficiency measures that loss--or rather, the preservation of that energy).
Here's another interesting thought: an overunity engine would also by default have NEGATIVE entropy: a physical impossibility.
a small amount of generated power looping back to power the motor and not needing any other fuel besides a start charge from the battery and already able to generate 6 megawatts in 20 turns with a dynamo out of a windfarm turbine is alot more effient then a nuclear reactor with heatpipes and waste that only generates 1kw
How about I puncture your thoughts on electric motors right now?
Electric motors DO produce torque. In fact, ALL rotating shafts have this feature. Torque is a FORCE and fundamental to physics.
Motors CAN be overloaded. Ask yourself why a cable elevator (which is run by an electric motor) has a weight limit? Because if it's too heavy, the elevator motor can't pull the load.
How about something a little more prosaic? Try removing an old rusted stuck screw with your electric screwdriver or drill with a driver bit (the drill is also an electric motor). Guaranteed it won't go easy (if at all--sometimes you overtorque and snap the head off).
"If you think you can do it, build a smaller model. Even a model that produces no excess power but spins itself forever would be worth approximately all of the money in the world. You would become an overnight billionaire, worth substantially more than the oil companies who'd really not like you (but to whom you would pose little immediate threat). Maplin or RS (or even eBay!) would be able to provide you with an appropriate motor, dynamo and other components to give it a go."
Here's a helpful hint. People have already tried this technique. Lookup "Bedini motor" or "overunity engine". I guarantee you will find nothing independently verifiable except failures (because a verifiable success would draw instant international attention).
But terribly inefficient. 2.5kW yields .72N of force at current rates. So the ability to accelerate in vacuum an object about the mass of a fifth of liquor 1 m per second per second. Plus I have to wonder about its usefulness in atmosphere. So, looks like it's back to waiting.
> But terribly inefficient. 2.5kW yields .72N of force at current rates.
Presumably though if you were already going 3km/s and it was still producing .72N, it would be near on 100% efficient?
It's not hard to reach those speeds either, if you're in a vacuum and prepared to wait. A probe en rourte to Pluto was said to be going 22km/s in 2006.
Which of course raises the question: How does the efficiency drop off with speed? If there's no mass ejection, it shouldn't?
But then past 3.5km/s it would be >100% efficient?
That alone makes it seem to me like it's not going to work, sadly.
Biting the hand that feeds IT © 1998–2019