Ford Fiesta ST
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#2795 - 18/10/04 10:18 AM Re: Fiesta ST Gear Ratios. [Re: davidChief]
Hugh Offline


Registered: 27/02/04
Posts: 1620
Loc: Warks
Sorry, my bad!

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#2796 - 18/10/04 06:10 PM Re: Fiesta ST Gear Ratios. [Re: Craig]
Doug Offline
n00b

Registered: 17/10/04
Posts: 9
Quote:


What's the matter? The 3 Billy Goats been trampling on your bridge a bit much??

Having known Hugh for the past 9 years, and having to have gone through University with him, there is no one more than me who enjoys to take the piss out of daft comments he comes out with....

However, I always ensure that if I do, then my argument is well structured and backed up by susbtantial evidence. If not, then the outcome is that I look like a twat, which is exactly what you've done here....

Now before you come back with some rant, I acknowledge there is the possibility you're right. If so, get some evidence and post it on here. The decent bloke that Hugh is, I know for a fact that in the face of evidence to prove he is wrong, he will admit the fact and 'stand corrected'..

What I suggest is you do the maths, post it on here and then we can discuss the matter amongst all of us. One of you is right and one of you is wrong, but for the time being, only one of you have produced something to back up your claim...

Oh and for the record, both Hugh and I have an honours degree in Engineering of which, I am sure you are aware, Maths is an integral part.....

Now run along now and be a nice chap and let those goats graze in the nice meadow..... [image]http://fiesta.mediahoard.com/chimage.php?image=829118102004337563.gif[/image]




You posted it, you justify it, I believe is the scientific precedent?

If you have an honours degree in Engineering (I have one in Physics if you want to flex intellectual muscle), then you won't mind explaining how you would achieve the linear relationship between Speed and RPM's?

I respectfully await your answer.

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#2797 - 18/10/04 06:35 PM Re: Fiesta ST Gear Ratios. [Re: Doug]
davidChief Offline
Test Account

Registered: 27/02/04
Posts: 864
Loc: Warwickshire
I thought it was fairly linear, with the obvious exception of drag and friction, but I know very little about this.
_________________________
Dave | Focus RS

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#2798 - 18/10/04 07:20 PM Re: Fiesta ST Gear Ratios. [Re: davidChief]
Scotty Offline
Porsche 997 Turbo & ST150

Registered: 27/02/04
Posts: 18100
Loc: Nuneaton, Warwickshire
o.O

Well im off to do Computer Science at Uni oh and im very good with the DELETE KEY

Wo0o0o0oT, damn im good


Edited by FiestaRS (18/10/04 07:26 PM)
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#2799 - 18/10/04 09:33 PM Re: Fiesta ST Gear Ratios. [Re: Doug]
Hugh Offline


Registered: 27/02/04
Posts: 1620
Loc: Warks
Quote:

then you won't mind explaining how you would achieve the linear relationship between Speed and RPM's?




Excellent, that's what I was hoping you would say. Rather than answering your question, I would like to hear you explain how the relationshipship of the output from an engine through a fixed ratio gearbox can be anything but linear?

Let me answer it for you, it can't be (unless the clutch is slipping! ). Using a fixed ratio'd gearbox the RPM of an engine has a direct ratio'd effect on the speed of the wheels therefore the speed of the vehicle.

So this leaves me wondering what you are all about. If you had said one single thing of use then I would say that you were perhaps mistaking what was being said and that you were trying to add extra mechanics to the theoretical statement, such as weight, acceleration, drag or resistance.

But you haven't, you've been rude, evasive and haven't offered a single solitary piece of relevant information so you must just be a troll. In which case, good bye.

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#2800 - 18/10/04 10:27 PM Re: Fiesta ST Gear Ratios. [Re: Hugh]
Doug Offline
n00b

Registered: 17/10/04
Posts: 9
Note how I used the phrase "real life". This means in the outdoors in the sunshine, with gravity and all that stuff.
What is the use of a graph that does not take into account the mechanics of the real world?

How is it theoretical? Theories are models that attempt to replicate real life. What is theoretical about something that knowingly neglects major forces?

This is like saying, "In theory My Nan can see clearly" But forgetting to mention that she dropped her glasses and both her eyes just fell out. Doesn't really work in reality does it?

So, in summary, what was the use of your initial post if you knew it bore no relation to the real world?

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#2801 - 18/10/04 10:28 PM Re: Fiesta ST Gear Ratios. [Re: Hugh]
Scotty Offline
Porsche 997 Turbo & ST150

Registered: 27/02/04
Posts: 18100
Loc: Nuneaton, Warwickshire
Tell u what tho...

All this linear has given me a sence for direction...

The Delete Key
_________________________

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#2802 - 18/10/04 10:31 PM Re: Fiesta ST Gear Ratios. [Re: Doug]
Scotty Offline
Porsche 997 Turbo & ST150

Registered: 27/02/04
Posts: 18100
Loc: Nuneaton, Warwickshire
Quote:

Note how I used the phrase "real life". This means in the outdoors in the sunshine, with gravity and all that stuff.
What is the use of a graph that does not take into account the mechanics of the real world?

How is it theoretical? Theories are models that attempt to replicate real life. What is theoretical about something that knowingly neglects major forces?

This is like saying, "In theory My Nan can see clearly" But forgetting to mention that she dropped her glasses and both her eyes just fell out. Doesn't really work in reality does it?

So, in summary, what was the use of your initial post if you knew it bore no relation to the real world?




Oh and are u sure u do Physics m8 because u havn't put one rational statement or equation together yet...

I am studying Computer Science aswell as Physics... next time u want to compare ur nan... maybe u can do it somewhere else that u wont get shown up?

*Sigh* there has to be one person to spoil the months of brilliant people adding gr8 comments and replies!!!
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#2803 - 18/10/04 11:20 PM Re: Fiesta ST Gear Ratios. [Re: Doug]
Moosefoof Offline
Fiesta Fan

Registered: 04/03/04
Posts: 107
I would rather believe the people with engineering degrees when it comes to engine and gearbox issues compared to a so-called physicist ("with gravity and all that stuff.") who has displayed no evidence of the knowledge someone of such education should posses. But then I would still stick with the engineers on such matters.

Whoever you are, one thing is clear – you like to antagonise and cause commotion for no reason. You went to the trouble of registering with the site for this sole reason which baffles me. You could have done the normal thing and a) said hello first and b) again, in light of being a new member, you could have contained your wonderful anger at the gear speed-graph and provided some constructive criticism instead of your twatish comment

P.S I'm also studying Mechanical Engineering at Uni (1st Year), could be firing a few questions at the already graduated engineers now I know who you are
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#2804 - 19/10/04 06:11 AM Re: Fiesta ST Gear Ratios. [Re: Doug]
Hugh Offline


Registered: 27/02/04
Posts: 1620
Loc: Warks
Quote:

Note how I used the phrase "real life". This means in the outdoors in the sunshine, with gravity and all that stuff.



So gravity 'and all that stuff' now has an effect on the relationship between an engine output and the drive it provides through to the wheels??? Stop it you're killing me!

Quote:

So, in summary, what was the use of your initial post if you knew it bore no relation to the real world?



It bears every relationship to the real world in in theory and practice. I don't however know many Fiesta ST's that will rev to 12 thousand or go at 220mph. That's the theoretical bit just incase you can't spot it.

BTW, to quote you earlier:
Quote:

The car will go at 220 mph at 10.5k revs in 5th? don't think so!
The car will go at 20 mph at 1k revs in 5th? Don't think so!




That's exactly what it would do.

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#2805 - 19/10/04 06:38 AM Re: Fiesta ST Gear Ratios. [Re: Hugh]
davidChief Offline
Test Account

Registered: 27/02/04
Posts: 864
Loc: Warwickshire
Quote:

This means in the outdoors in the sunshine, with gravity and all that stuff.




Eheheheheh, you get gravity indoors as well mate! Even your Nan should know that one!
_________________________
Dave | Focus RS

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#2806 - 19/10/04 06:48 AM Re: Fiesta ST Gear Ratios. [Re: Doug]
Craig Offline
Fiesta Fan

Registered: 28/02/04
Posts: 204
Quote:

Quote:


What's the matter? The 3 Billy Goats been trampling on your bridge a bit much??

Having known Hugh for the past 9 years, and having to have gone through University with him, there is no one more than me who enjoys to take the piss out of daft comments he comes out with....

However, I always ensure that if I do, then my argument is well structured and backed up by substantial evidence. If not, then the outcome is that I look like a twat, which is exactly what you've done here....

Now before you come back with some rant, I acknowledge there is the possibility you're right. If so, get some evidence and post it on here. The decent bloke that Hugh is, I know for a fact that in the face of evidence to prove he is wrong, he will admit the fact and 'stand corrected'..

What I suggest is you do the maths, post it on here and then we can discuss the matter amongst all of us. One of you is right and one of you is wrong, but for the time being, only one of you has produced something to back up your claim...

Oh and for the record, both Hugh and I have an honours degree in Engineering of which, I am sure you are aware, Maths is an integral part.....

Now run along now and be a nice chap and let those goats graze in the nice meadow.....




You posted it, you justify it, I believe is the scientific precedent?

If you have an honours degree in Engineering (I have one in Physics if you want to flex intellectual muscle), then you won't mind explaining how you would achieve the linear relationship between Speed and RPM's?

I respectfully await your answer.




For all the good your Physics degree has done you, it sadly hasn't offered you the ability to read and understand plain English. Just point out to me at what point did I suggest that he was right and you were wrong?? I didn't because I personally don't know the answer. However you were attacking someone's intellectual ability in the first reply you posted up on here - that is why I mentioned that Hugh's maths is a tad more advanced than grade D GCSE, not to prove your statement wrong.

My interest in cars is particularly limited. I'm actually an IT professional who offered to help Hugh out when he was starting up these forums. If, instead of jumping in and shouting your mouth off at the first thing you read, you had bothered to read some of the posts on here, you would have noted that I am anything but a hardcore car fanatic...

My problem was not with you arguing a point (I don't think anyone would have a problem with that so long as it is backed up by sufficient evidence); my problem was with the attitude and manner in which you did it. It is not warranted, and it is certainly not welcome here...

I suggest you either change your attitude very quickly or find some other board to troll around in....

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#2807 - 19/10/04 12:14 PM Re: Fiesta ST Gear Ratios. [Re: Craig]
Scotty Offline
Porsche 997 Turbo & ST150

Registered: 27/02/04
Posts: 18100
Loc: Nuneaton, Warwickshire
Here, here Craig!!! Well said!!!
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#2808 - 19/10/04 06:03 PM Re: Fiesta ST Gear Ratios. [Re: Hugh]
Doug Offline
n00b

Registered: 17/10/04
Posts: 9
Quote:


It bears every relationship to the real world in in theory and practice. I don't however know many Fiesta ST's that will rev to 12 thousand or go at 220mph. That's the theoretical bit just incase you can't spot it.






To make it simple as you as you all are skipping the point.
As you pointed out your graph only takes into account gearing ratio's etc etc....
It discounts many aspects of the real world e.g. drag therefore, I say it again;
220MPH at 10.5K revs in 5th
Don't think so!
Or if you want to tone it down a little
160MPH at 8K revs in 5th
Don't think so!
So I ask again, why make the graph, when it discounts major parts of the real world. And don't say it is theoretical, it is not theoretical if it clearly won't happen in the real world. Drag is a real drag and slows ya down

p.s. Gravity does not exist in my Nan's house, how else do you explain her bad eyesight? eh?

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#2809 - 19/10/04 06:21 PM Re: Fiesta ST Gear Ratios. [Re: Doug]
Hugh Offline


Registered: 27/02/04
Posts: 1620
Loc: Warks
WHAT THE FUCK ARE YOU TALKING ABOUT?!!!!!!!!!!!!!!!!!!

This chart shows the relationship between revs and speed, not acceleration, braking or anything else, it demostrates the relationship between the output of an engine to the rotation of a wheel via known measures (ratios and tyre size). Drag plays NO part in this relationship, how could it?!

Come on then, why would it not do 160mph @ 8k revs then? There are a lot of sniggering people waiting for your explanation.

Oh and for the record, "don't think so" is not a valid argument.

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