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  #946  
Old 03-03-2008, 03:32 PM
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Originally Posted by hightower99 View Post
How is it wrong? it clearly states that either heat OR heat and light... meaning glow and flame is optional... Again: cellular respiration is a combustion process yet I doubt you are covered in flames at this moment are you?

I don't quite follow you. The article I posted showed several oxidants that have no oxygen in them. If chlorine is an oxidant (it is) then it oxidizes the hydrogen and since the reaction occurs exothermally then it is combustion.
Chlorine causes oxygen molecules to jump from one compound to another causing oxidation, so it is an oxidizing agent or catalyst. Hydrogen and chlorine do not have oxygen molecules but can create combustion, which is not oxidation.

Please please please go do some more research in this area....
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  #947  
Old 03-03-2008, 03:45 PM
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Originally Posted by revetec View Post
Chlorine causes oxygen molecules to jump from one compound to another causing oxidation, so it is an oxidizing agent or catalyst. Hydrogen and chlorine do not have oxygen molecules but can create combustion, which is not oxidation.
So you thinnk that chlorine is only an oxidant when in an oxygen rich enviroment?

Sorry but it is an oxidant all on its own.

Maybe you didn't read the wiki article???

And again I never said that combustion needed to be a form of oxidation anyways. I have only stated the definition.
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  #948  
Old 03-03-2008, 03:45 PM
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Originally Posted by The Raptor View Post
What's the current cost of your engines you use in your trikes ?
eg. Replacement Cost !
Hi Raptor,

The production cost of our current trike engines are confidential, however we are selling performance replacement units for between AUD7,200 to 9,500 depending on final config.

We have a target price set for the Revetec X4 trike engine, all indications show that we will meet this price target in production. Unfortunately I can't reveal the price. The ultimate outcome is to have the engine manufactured in China.

Last edited by GTM; 03-03-2008 at 03:49 PM.
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  #949  
Old 03-03-2008, 03:55 PM
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Originally Posted by hightower99 View Post
Unfortunately that whole thing equates combustion to flames in the same bad logic that you pointed out at the start

ie. if all flames are the result of combustion then all combustion must result in flames.

This is however not entirely valid as it doesn't agree with the definition.
STOP ... you are clearly using WiKi as your primary source.
Go study some Chemistry ... PLEASE ...... continuing this "discussion" is pointless until such time as you learn to think and use the language of Chemistry !!
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  #950  
Old 03-03-2008, 04:02 PM
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Originally Posted by Matra et Alpine View Post
STOP ... you are clearly using WiKi as your primary source.
Go study some Chemistry ... PLEASE ...... continuing this "discussion" is pointless until such time as you learn to think and use the language of Chemistry !!
Actually I am using wiki as an easy source of information on the internet that I can quickly copy-paste here.

I learned the difference between combustion and oxidation in school.

The fact is that the chemical reaction between hydrogen and oxygen resulting in water is combustion whether it makes a flame or not.

I ask you again: Do you agree that cellular respiration is a form of combustion (commonly known as Slow combustion)???

answer the question please.
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  #951  
Old 03-03-2008, 04:09 PM
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Wikipedia is great. The problem is that you or I can modify it. GO to an encyclopedia resource as I did with: The Columbia Encyclopedia, Sixth Edition | Date: 2007

Wikipedia search on cellular respiration had no combustion terms in the article.

Last edited by revetec; 03-03-2008 at 04:12 PM.
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  #952  
Old 03-03-2008, 04:16 PM
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The Coastal Table
so back to revetec...how is the development and placement into actual vehicles going?
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  #953  
Old 03-03-2008, 04:16 PM
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ht, you sure you're not getting yourself wrapped up in your own confusion ?

Combustion is fast oxidation.
where have you come up with "slow combustion" ?

So as Fiorano added ... let's get back ON TOPIC>
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  #954  
Old 03-03-2008, 04:24 PM
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Quote:
Originally Posted by hightower99 View Post
I ask you again: Do you agree that cellular respiration is a form of combustion (commonly known as Slow combustion)???

answer the question please.
Don't get the singular term "Combustion" confused with the term "intracellular combustion". If you want to go down this path, start another topic on a biology forum because it will go on forever.....
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  #955  
Old 03-03-2008, 04:28 PM
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Matra & revetec: I asked a simple Yes/No question.

Do you agree that cellular respiration is a form of combustion (slow combustion)?

Quote:
Originally Posted by wiki
Slow
Slow combustion is a form of combustion which takes place at low temperatures. Cellular respiration is an example of slow combustion.
From: Combustion - Wikipedia, the free encyclopedia
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  #956  
Old 03-03-2008, 04:38 PM
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We already stated the difference between slow oxidation and rapid oxidation.
ICE have rapid oxidation (which produces a flame/burn, and fuel cells have slow oxidation).

Fuel cells has "intracellular combustion" and ICE has "combustion"

Fuel cells do not have a flame/burn so I will accept you stating that fuel cells have "intracellular combustion" but not "Internal Combustion" as you stated.
You can go on and on about it, but in an automotive sense (and everyone viewing this thread being automotive orientated) as referring to a fuel cell as being internal combustion is rather pedantic.

I'm not going to enter anything more on this. If anyone else wants to comment on this, go ahead...

Last edited by revetec; 03-04-2008 at 12:08 AM.
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  #957  
Old 03-05-2008, 03:19 AM
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Originally Posted by GTM View Post
Hi Raptor,

The production cost of our current trike engines are confidential, however we are selling performance replacement units for between AUD7,200 to 9,500 depending on final config.

We have a target price set for the Revetec X4 trike engine, all indications show that we will meet this price target in production. Unfortunately I can't reveal the price. The ultimate outcome is to have the engine manufactured in China.
China sounds interesting !

It would be Great (envy) to be the First to bring a Revetec engine to market place.

I found over half a dozen of your Trike sites when searching google.
Was wondering approx. how many trikes are sold world wide ?
I assume you are the only Ozi outlet ?
Also, approx. how many Trikes would we turn over in Australian ?

Last edited by The Raptor; 03-05-2008 at 05:57 AM.
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  #958  
Old 03-05-2008, 11:58 AM
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Brad, on a slightly different note about the engine, with some reference to what was said a while back about the gearing of the output.

Your engines now are geared up 3:1 to provide a normal output, so a normal set of gear ratios suited to a small petrol engine can be used in a road going vehicle.

Obviously the standard output couldn't be used for this with say a 2000rpm redline, but how would you predict a vehicle would perform if the Revetec lump could be made to rev to 4000rpm un geared (12000 conventional) and coupled to a long ratio gearset suited to a high revving diesel?

I'm sure you must have given some thought to something along these lines but I couldn't get my head round whether or not that would be a good combination?

Obviously talking purely from a performance point of view here now, not fuel economy sorry!

If anyone has any thoughts on how this combination would work I would love to hear your opinions!
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  #959  
Old 03-05-2008, 02:06 PM
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Kozy: I think you have it backwards. You got drive off directly off the trilobe then 1 stroke would take only 60 degrees of output shaft rotation.

Currently revetec uses a seperate geared output shaft that has a 1:3 ratio (not 3:1) so that 1 stroke of a piston now takes a more normal 180 degrees of output shaft rotation.

This means that when the revetec is running 4000RPM with the geared output shaft it is running like a normal engine, however without the geared output shaft then the pistons and valvetrain have to run faster. To produce 4000RPM at the output shaft the pistons have to achieve the velocity that a normal engine does at 12000RPM, same with the valvetrain.
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  #960  
Old 03-05-2008, 02:10 PM
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There are engines out there that have revved to about 18,000rpm which means it is possible to reach 6,000rpm on the trilobe shaft.
Two things though:
1) We don't have a Formula 1 budget to even consider this at the moment.
2) Our engine exploits low down torque and is most fuel efficient at this point.

The industry is driven by fuel efficiency and emissions these days.
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