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Author Rolling Road day today.........**pics and results**
Tim
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23rd Nov 03 at 01:29   View Garage View User's Profile U2U Member Reply With Quote
How do you come up with flywheel power then?

The test is carried out in fourth gear. (This is because 4th is usually direct on most cars so gives the least losses). We dial no load into the rollers and get the car rolling in 4th at 1000 rpm. Then the throttle is opened fully and resistance is applied to match engine power. As engine power increases (when the turbo comes in) the resistance is increased, just to provide a steady smooth rate of acceleration. When maximum power has been shown and power is decreasing the transmission is disengaged and allowed to free-wheel on the rollers. This means the huge amount of energy built up into the rollers is reversed and they drive the transmission up to the clutch.

There is then a negative torque reaction and the amount of power required to drive the transmission is added to the power previously measured at the wheels. Simple eh?
Lucky B
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23rd Nov 03 at 01:29   View User's Profile U2U Member Reply With Quote
Blame sleepy Sooty, he didn't mention bhp or %

He'll be in the morning when he sees all this!
mav
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23rd Nov 03 at 01:29   View User's Profile U2U Member Reply With Quote


[Edited on 23-11-2003 by Trotty]
Tim
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Lucky B
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23rd Nov 03 at 01:31   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Tim
How do you come up with flywheel power then?

The only way to measure a fly fig accurately is on a dyno as i said many pages ago...
Kerry
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23rd Nov 03 at 01:31   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Lucky B
Blame sleepy Sooty, he didn't mention bhp or %



wot about blamin u for jumping to conclusion usin wrong calculations then not even havin the decency to listen to me when i was tryin to explain to u other wise. just kus im female oh and u are so great with cars
Colin
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23rd Nov 03 at 01:31   View User's Profile U2U Member Reply With Quote
My head hurts now
Tim
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23rd Nov 03 at 01:32   View Garage View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Lucky B
quote:
Originally posted by Tim
How do you come up with flywheel power then?

The only way to measure a fly fig accurately is on a dyno as i said many pages ago...


Um it was a rhetorical question -- my explanation, sorry Power Engineering's explanation, is given below that question...
kerzo
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23rd Nov 03 at 01:32   View User's Profile U2U Member Reply With Quote


[Edited on 23-11-2003 by Trotty]
Lucky B
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23rd Nov 03 at 01:33   View User's Profile U2U Member Reply With Quote
Not at all Kerry, but as i said RR's measure power @ wheels, fly is threoretical and all RR's read differently.
I've read it all...
sxi16vjoe
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23rd Nov 03 at 01:34   View User's Profile U2U Member Reply With Quote


[Edited on 23-11-2003 by Trotty]
Tim
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23rd Nov 03 at 01:35   View Garage View User's Profile U2U Member Reply With Quote
How is is theoretical on a manual car when they can measure the drag on the rollers with the car free-wheeling?
Kerry
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23rd Nov 03 at 01:35   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Lucky B
Not at all Kerry, but as i said RR's measure power @ wheels, fly is threoretical and all RR's read differently.
I've read it all...


ure not tellin me anythin i dont know here and i have never disputed those facts i was disputing ure maths
kerzo
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23rd Nov 03 at 01:36   View User's Profile U2U Member Reply With Quote


[Edited on 23-11-2003 by Trotty]
sxi16vjoe
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23rd Nov 03 at 01:37   View User's Profile U2U Member Reply With Quote


[Edited on 23-11-2003 by Trotty]
Lucky B
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23rd Nov 03 at 01:37   View User's Profile U2U Member Reply With Quote
Depends how you add things up i suppose Kerry.....
kerzo
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23rd Nov 03 at 01:39   View User's Profile U2U Member Reply With Quote


[Edited on 23-11-2003 by Trotty]
Kerry
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23rd Nov 03 at 01:39   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Lucky B
Depends how you add things up i suppose Kerry.....


oh ffs just admit u was wrong and go to bed

this is like sayin u can just pluck any figures out of thin air add them and multiply them to how u want and then hey presto a figure that means fuck all
kerzo
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23rd Nov 03 at 01:40   View User's Profile U2U Member Reply With Quote
you know what you guys all need after all this mathematical stress.........a GROUP HUG!! come on dont be shy!!
Tim
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23rd Nov 03 at 01:41   View Garage View User's Profile U2U Member Reply With Quote
Group hug
sxi16vjoe
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23rd Nov 03 at 01:41   View User's Profile U2U Member Reply With Quote


[Edited on 23-11-2003 by Trotty]
Kerry
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23rd Nov 03 at 01:42   View User's Profile U2U Member Reply With Quote
im not huggin noone ta and im not stressed
sxi16vjoe
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23rd Nov 03 at 01:43   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Kerry
im not huggin noone ta and im not stressed



not even me??x
kerzo
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23rd Nov 03 at 01:45   View User's Profile U2U Member Reply With Quote


[Edited on 23-11-2003 by Trotty]
sxi16vjoe
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23rd Nov 03 at 01:51   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Kerry
im not huggin noone ta and im not stressed


kerry just hugged me!

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