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Because we all need a CG125 that does 300mpg

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multijoy
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PostPosted: 14:32 - 09 Mar 2010    Post subject: Because we all need a CG125 that does 300mpg Reply with quote

A bit of hyperbole, but would be interesting if they could squeeze this into bikes...
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Kal
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PostPosted: 12:19 - 25 May 2010    Post subject: Re: Because we all need a CG125 that does 300mpg Reply with quote

multijoy wrote:
A bit of hyperbole, but would be interesting if they could squeeze this into bikes...


Might be just the ticket when we get to the point that filling the tank costs more than it does to buy the bike... Cool
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illich
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PostPosted: 15:33 - 02 Aug 2010    Post subject: Re: Because we all need a CG125 that does 300mpg Reply with quote

multijoy wrote:
A bit of hyperbole, but would be interesting if they could squeeze this into bikes...


I think my moped was the best for fuel efficiency... The engine seemed to flood so often I swear i pushed it more than I drove it! Razz
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G
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PostPosted: 15:48 - 02 Aug 2010    Post subject: Re: Because we all need a CG125 that does 300mpg Reply with quote

multijoy wrote:
A bit of hyperbole, but would be interesting if they could squeeze this into bikes...

Wow! They're only 2mph off a stock Citreon AX diesel in 1988!
https://en.wikipedia.org/wiki/Citro%C3%ABn_AX
Wink

To be fair, that's 100mpg in UK not US gallons.
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tahrey
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PostPosted: 10:39 - 03 Aug 2010    Post subject: Reply with quote

Wow! They just invented... er, the Alfa Multi-Air system.

It sounds pretty cool, but watch as you never, ever hear of this again. Or the other interesting things linked on that page (the 2/4 stroke "hybrid", storing regerative-brake energy with compressed air tanks, etc).

(Wouldn't it be CBF / Innova / SH Lead with 300mpg anyway, as this uses an injection system? Wink )

Combine all of the above, and run it on biodiesel, for incredible parsinomy.

BTW G, what speed was that Citroen cruising at on it's incredible journey? I would hope a current small diesel could match it (other than the Smart, of course) - my dad's JTD Panda has a lifetime economy of 68mpg, between city and 60mph-ish motorway trundles. Stick it at a flat 40 or 50mph and it could well clear three figures. However a typical chunky American car, doing that on their lacklustre petrol (93 RON is hot stuff to them) and making 100 miles to a short gallon is worthy of note if it's true.
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G
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PostPosted: 11:10 - 03 Aug 2010    Post subject: Reply with quote

Chunky in weight possibly - but certainly not aerodynamics and you'll note from the original link that their new car had to do 50mph to get that figure. I don't see any details about the speed of the citreon on wikipedia, I presume it wasn't going flat out, though Smile.
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tahrey
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PostPosted: 15:07 - 07 Aug 2010    Post subject: Reply with quote

G wrote:
Chunky in weight possibly - but certainly not aerodynamics and you'll note from the original link that their new car had to do 50mph to get that figure. I don't see any details about the speed of the citreon on wikipedia, I presume it wasn't going flat out, though Smile.


Eh, if it's doing it on a flatlands cruise, then all bets are off. Vehicle has to stop and start sometime after all. I doubt that on a drive from Britain to the south of Spain you're going to be able to keep a constant, never-wavering 50. Though from my own economy experiments and knowing the sort of tricks other manufacturers got up to in the 80s with economy claims (a certain petrol Metro could get about 80mpg ... at a constant 30mph. My own 1.6 Megane does mid-60s under those conditions) they were probably going so slow as to get in everyone's way. You could do the distance in less than 2 days at 25 with a rotating Le Mans style team of drivers.
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radical
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PostPosted: 20:48 - 07 Aug 2010    Post subject: Reply with quote

Bring back the good old one stroke engine that could run on any fuel, the person that sold the rights of this engine to Ford should have been shoot. Mr. Green
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tahrey
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PostPosted: 10:49 - 16 Aug 2010    Post subject: Reply with quote

...one-stroke?!
you don't mean steam do you? Laughing
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kal9001
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PostPosted: 02:06 - 10 Sep 2010    Post subject: Reply with quote

Age old story, Man invents awesome new technology that will displace existing technology...BUT 'they' have other plans, they haven't finished milking all the money from us yet.
One of two things will happen.
An oil company (Not directly of course, but via some small holdings they have that the media will never be assed with tracing) will buy the rights and then suppress the technology, by just covering it up or by taking SO damn long to develop it that its always on the horizon but never turns up.
IF they don't do ether of those things we will all enjoy 100 mpg in our cars sure thing, but due to unforeseeable economic issues the price of petrol spontaneously jumped to £3.50p per litre within the next few months after it went main stream.
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colin1
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PostPosted: 02:45 - 10 Sep 2010    Post subject: Reply with quote

A bit too much conspiracy theory there kal. I dont believe oil companies can control car companies. If there is a conspiracy, its in forcing us to embrace low mpg by taxing the fuck out of fuel, car tax etc.

Our governments dont like being overly dependant on oil states, so they invade them, threaten to invade them, and hype up all this environmental stuff.
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radical
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PostPosted: 19:02 - 11 Sep 2010    Post subject: Reply with quote

tahrey wrote:
...one-stroke?!
you don't mean steam do you? Laughing


No, I mean the one stroke engine and not a steam engine which only produces power on the downward stroke of the piston, a one stroke engine produces power on both strokes of the engine.
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radical
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PostPosted: 21:13 - 13 Sep 2010    Post subject: Reply with quote

tahrey wrote:
...one-stroke?!
you don't mean steam do you? Laughing


there ya go, its also called a "hot air engine"as it runs on hot air or a Stirling cycle engine, they are becoming more widely used in household heating boiler were they can generate electricity from the waste heat in the boilers, they are widely used in cold climates as they are an external combustion engine than will run if heated or cooled so no fuel is necessary to run them and they have few moving parts
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Astridax
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PostPosted: 17:35 - 09 Nov 2010    Post subject: Reply with quote

I am going to have to look into that sort of engine, because to make energy from being cooled (i.e energy leaving the engine) sounds like it is breaking laws of thermodynamics, the major one being, you can't get something for nothing Smile.
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blurredman
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PostPosted: 18:13 - 09 Nov 2010    Post subject: Reply with quote

It's in US gallons which is smaller so our gallon figure would be even higher! Cool
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tahrey
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PostPosted: 17:06 - 30 Nov 2010    Post subject: Reply with quote

radical wrote:
so no fuel is necessary to run them and they have few moving parts


Rubbish. That's a definition of a perpetual motion machine. All engines require some kind of energy source. Whether it's a candle heating the "hot" end of it, or some kind of refridgerator cooling the other. Even if you put one side inside a warm, insulated house, and the other out in the snow, it will work by funnelling heat energy out of the house and into the environment. A bit like a waterwheel, except it runs by leeching off the conduction of heat energy rather than the force of gravity on a fluid. A waterwheel isn't a "no energy input"/"no fuel" device either - basically, it's using the nuclear furnace of the sun as fuel in a very roundabout fashion, and subtly slows the water flow it removes the energy from.

I can see it being very efficient (stirling engines are supposed to be - but we're currently trying, as we have been since at least the 70s, to leap the hurdle of making them produce useful amounts rather than being a toy), or even a handy way of running a fridge in Sweden, but it's still going to use energy. And it's still external combustion, which means if you try to make it run at a useful speed by directly heating one side (or cooling it, which usually involves heat generated/dumped *somewhere*) you're unavoidably losing some of the source heat to the environment before it even has a chance to do useful work - though you don't have as much reciprocating loss or air pumping issues - as opposed to an ICE where it's all contained during the work phase (instead being lost from conductive heating of the block, as exhaust, etc) and the losses come from friction, piston inertia, air pumping friction etc instead.

The main "useful" application i've seen so far for a stirling engine is to power Sosuke's boat in Ponyo... and that was only a bath toy 'til it was magically transformed...
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