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Curious pic of the Renault
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GYXU > F1, Indy, Nascar, Rally > Curious pic of the Renault 15 April 2005 13:30:40
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Curious pic of the Renault

Ric Zito 11 April 2005 00:10:26
 This is from the barcelona test :

http://www.pitpass.­com/fes_php/pitpass_­gallery_image_displa­y.php?fes_gal
_id=392&fes_image_n­umber=11&fes_reverse­_order=

Strangely, the chimneys are blanked off. Seems an odd thing to do.
Can anyone shine a light on the rationale behind that?
--
ric

ric at pixelligence dot com
Add comment
Bootboy 11 April 2005 00:18:32 [ permanent link ]
 
"ric zito" <ADDRESS@IN.SIG> wrote in message
news:1gutpfb.1mxm51­w1l9auwcN%ADDRESS@IN­.SIG...> This is from the barcelona test :>
http://www.pitpass.­com/fes_php/pitpass_­gallery_image_displa­y.php?fes_gal> _id=392&fes_image_n­umber=11&fes_reverse­_order=>
Strangely, the chimneys are blanked off. Seems an odd thing to do.> Can anyone shine a light on the rationale behind that?

They're not expecting Santa to visit this year?

bootboy


Add comment
Big Craigie 11 April 2005 00:44:37 [ permanent link ]
 
"ric zito" <ADDRESS@IN.SIG> wrote in message
news:1gutpfb.1mxm51­w1l9auwcN%ADDRESS@IN­.SIG...> This is from the barcelona test :>
http://www.pitpass.­com/fes_php/pitpass_­gallery_image_displa­y.php?fes_gal> _id=392&fes_image_n­umber=11&fes_reverse­_order=>
Strangely, the chimneys are blanked off. Seems an odd thing to do.> Can anyone shine a light on the rationale behind that?> -- > ric>
ric at pixelligence dot com

You sure they are chimneys. They just look like extra aero devices kind of
like the Viking Horns on the McLaren

Big Craigie


Add comment
Bootboy 11 April 2005 01:14:26 [ permanent link ]
 
"Big Craigie" <bigcraigieyourclot­hes13@yahoo.co.uk> wrote in message
news:d3c382$jka$1@n­ews8.svr.pol.co.uk..­.> You sure they are chimneys. They just look like extra aero devices kind of> like the Viking Horns on the McLaren

He's referring to the vertical bits on the sidepods (above the Mild Seven
logo). The airflow is forced up over the chimney, creating a low pressure
area which then draws the air out of the sidepods faster. Obviously they
need holes in the top to do this or the design is pointless.

Curiously, this is the first time I've noticed the extent of the
grille-slits on the rear of the side pods. Have they always covered such a
large area of the bodywork? Maybe Renault are experimenting with different
ways of getting airflow through the sidepod without channelling it through
the chimney.

bootboy


Add comment
F/Fgeorge 11 April 2005 02:35:52 [ permanent link ]
 On Sun, 10 Apr 2005 22:14:26 +0100, "bootboy"
<spamgoestohere@hot­mail.com> wrote:
"Big Craigie" <bigcraigieyourclot­hes13@yahoo.co.uk> wrote in message >news:d3c382$jka$1@­news8.svr.pol.co.uk.­..>> You sure they are chimneys. They just look like extra aero devices kind of>> like the Viking Horns on the McLaren>
He's referring to the vertical bits on the sidepods (above the Mild Seven >logo). The airflow is forced up over the chimney, creating a low pressure >area which then draws the air out of the sidepods faster. Obviously they >need holes in the top to do this or the design is pointless.>
Curiously, this is the first time I've noticed the extent of the >grille-slits on the rear of the side pods. Have they always covered such a >large area of the bodywork? Maybe Renault are experimenting with different >ways of getting airflow through the sidepod without channelling it through >the chimney.>
bootboy >
If you scroll thru to picture 44 you will see that there seem to be no
vents on the chimneys, but more on the side of the bodywork.

Add comment
F/Fgeorge 11 April 2005 02:40:26 [ permanent link ]
 On Sun, 10 Apr 2005 22:14:26 +0100, "bootboy"
<spamgoestohere@hot­mail.com> wrote:
"Big Craigie" <bigcraigieyourclot­hes13@yahoo.co.uk> wrote in message >news:d3c382$jka$1@­news8.svr.pol.co.uk.­..>> You sure they are chimneys. They just look like extra aero devices kind of>> like the Viking Horns on the McLaren>
He's referring to the vertical bits on the sidepods (above the Mild Seven >logo). The airflow is forced up over the chimney, creating a low pressure >area which then draws the air out of the sidepods faster. Obviously they >need holes in the top to do this or the design is pointless.>
Curiously, this is the first time I've noticed the extent of the >grille-slits on the rear of the side pods. Have they always covered such a >large area of the bodywork? Maybe Renault are experimenting with different >ways of getting airflow through the sidepod without channelling it through >the chimney.>
bootboy >
#74 seems to show the side vents better.


Add comment
F2005: 0 of 1 11 April 2005 03:05:56 [ permanent link ]
 On Sun, 10 Apr 2005 22:10:26 +0200, ADDRESS@IN.SIG (ric zito) wrote:>This is from the barcelona test :>http://www.pitpas­s.com/fes_php/pitpas­s_gallery_image_disp­lay.php?fes_gal>_id=­392&fes_image_number­=11&fes_reverse_orde­r=

Uhhhh-GLEE!

I take it back... They've made a complete dog's breakfast of the rear
section (it looks like Camilla's bloody wedding hat [what's with
English twats "of a certain age" and hideous headgear?]) I can no
longer claim the Renault is the prettiest car on the grid this year.

...That's now the F2005, after kerbing the chin wing off the front.
Strangely, the chimneys are blanked off. Seems an odd thing to do.>Can anyone shine a light on the rationale behind that?

Testing them as pure aero devices, testing a redesign on a day where
they'd provide too much cooling if functional, testing the aiflow/drag
components of the gill slits alone, et cetera.

Add comment
Bootboy 11 April 2005 03:20:31 [ permanent link ]
 
"f/fgeorge" <ffgeorge@yourplace­.com> wrote in message
news:mmaj51hu20qpd7­9drfvekp8oa6tuu7vi9h­@4ax.com...> #74 seems to show the side vents better.

Yes, that is a more familiar view of the vents. I'd always assumed the vents
were just on the side of the side pod. Picture #11 and *44 clearly shows
they extend across the full width of the sidepod all the way to the yellow
stripe on the engine cover. This is a far bigger area than I've ever noticed
before. I must admit though, I've never really paid close attention to that
area of the car.

I can only assume that the extra vents make the chimneys redundant, but
they've chosen to retain the chimney to manage the airflow over the sidepod
winglet. I'm sure somebody here must know more about aerodynamics than me!

bootboy



Add comment
Theyak 11 April 2005 05:03:13 [ permanent link ]
 In article <1gutpfb.1mxm51w1l9­auwcN%ADDRESS@IN.SIG­>, ADDRESS@IN.SIG
says...> This is from the barcelona test :>
http://www.pitpass.­com/fes_php/pitpass_­gallery_image_displa­y.php?fes_gal> _id=392&fes_image_n­umber=11&fes_reverse­_order=>
Strangely, the chimneys are blanked off. Seems an odd thing to do.> Can anyone shine a light on the rationale behind that?>



Renault use larger gill slits than the other teams. They only use open
chimneys in really hot climates. The reason the leave them there even
tho they are closed is that all the aero calculations are made with them
in place (for when they DO need them).

I think...
Add comment
F2005: 0 of 1 11 April 2005 05:18:06 [ permanent link ]
 On Mon, 11 Apr 2005 00:20:31 +0100, "bootboy"
<spamgoestohere@hot­mail.com> wrote:>"f/fgeorge" <ffgeorge@yourplace­.com> wrote in message >news:mmaj51hu20qpd­79drfvekp8oa6tuu7vi9­h@4ax.com...>> #74 seems to show the side vents better.>
Yes, that is a more familiar view of the vents. I'd always assumed the vents >were just on the side of the side pod. Picture #11 and *44 clearly shows >they extend across the full width of the sidepod all the way to the yellow >stripe on the engine cover. This is a far bigger area than I've ever noticed >before. I must admit though, I've never really paid close attention to that >area of the car.>
I can only assume that the extra vents make the chimneys redundant, but >they've chosen to retain the chimney to manage the airflow over the sidepod >winglet. I'm sure somebody here must know more about aerodynamics than me!

...You actually outclass 97.7% of RASF1.

Add comment
Bootboy 11 April 2005 05:32:39 [ permanent link ]
 
"theyak" <yak@dev.null> wrote in message
news:MPG.1cc388e5ce­3b5c0e98a077@news.ea­synews.com...> Renault use larger gill slits than the other teams. They only use open> chimneys in really hot climates. The reason the leave them there even> tho they are closed is that all the aero calculations are made with them> in place (for when they DO need them).>
I think...

I'm not sure that sounds right. A closed chimney will have a different
aerodynamic effect than an open one (no air coming out the top for one
thing). A chimney will generally have a negative effect on the aerodynamics
of the car because of the increased drag. This 'penalty' of extra drag is
normally offset by the benefit of the additional cooling they provide. If
the chimney is closed and provides only drag then surely it would be better
to remove it. Or maybe Renault aren't capable of redesigning the side-pod
winglet to compensate for the loss of the chimney?

I think the most sensible suggestion posted so far is that they are
simulating running in an extra-hot climate by decreasing the efficiency of
the radiators.

bootboy


Add comment
Bootboy 11 April 2005 05:35:11 [ permanent link ]
 
"F2005: 0 of 1" <Ron.Dennis@LyingCh­eatingSwine.com> wrote in message
news:k2kj51t67us11e­j7k613ip591f4n0uvm3o­@4ax.com...> ...You actually outclass 97.7% of RASF1.>
LOL! That is damning me with faint praise ;-)­

bootboy


Add comment
Theyak 11 April 2005 10:39:18 [ permanent link ]
 In article <d3ck38$aup$1@domit­illa.aioe.org>, spamgoestohere@hotm­ail.com
says...>
"theyak" <yak@dev.null> wrote in message > news:MPG.1cc388e5ce­3b5c0e98a077@news.ea­synews.com...> > Renault use larger gill slits than the other teams. They only use open> > chimneys in really hot climates. The reason the leave them there even> > tho they are closed is that all the aero calculations are made with them> > in place (for when they DO need them).> >
I think...>
I'm not sure that sounds right. A closed chimney will have a different > aerodynamic effect than an open one (no air coming out the top for one > thing). A chimney will generally have a negative effect on the aerodynamics > of the car because of the increased drag. This 'penalty' of extra drag is > normally offset by the benefit of the additional cooling they provide. If > the chimney is closed and provides only drag then surely it would be better > to remove it. Or maybe Renault aren't capable of redesigning the side-pod > winglet to compensate for the loss of the chimney?>
I think the most sensible suggestion posted so far is that they are > simulating running in an extra-hot climate by decreasing the efficiency of > the radiators.>
bootboy >


I know for a fact that's why they have the chimneys still on the car
when they are closed off. During the 2004 US Grand Prix we (speedtv) got
to hear it directly from a Renault engineer's mouth.
Add comment
Bootboy 11 April 2005 11:04:29 [ permanent link ]
 
"theyak" <yak@dev.null> wrote in message
news:MPG.1cc3d7a8dc­f2130598a07a@news.ea­synews.com...> I know for a fact that's why they have the chimneys still on the car> when they are closed off. During the 2004 US Grand Prix we (speedtv) got> to hear it directly from a Renault engineer's mouth.

Fair enough. I assumed from your "I think" comment at the end of your last
post that you were only speculating. Thank you for quoting your source.

bootboy


Add comment
Yousuf Khan 14 April 2005 08:10:47 [ permanent link ]
 ric zito wrote:> This is from the barcelona test :>
http://www.pitpass.­com/fes_php/pitpass_­gallery_image_displa­y.php?fes_gal> _id=392&fes_image_n­umber=11&fes_reverse­_order=>
Strangely, the chimneys are blanked off. Seems an odd thing to do.> Can anyone shine a light on the rationale behind that?

It's likely that they don't need those "chimneys" all of the time for
venting. It looks to me that even without a venting effect, these
devices act as air redirectors, helping to direct some of the air over
those little winglets right behind them.

Yousuf Khan
Add comment
Paul-B 15 April 2005 12:02:48 [ permanent link ]
 DC wrote:
In case there's any confusion (it confused me), this wan't me. I'll> resist a Paul-like temptation to relabel myself "the real DC". Or> maybe this one is from the real DC...?


Everyone knows you're the "surreal" DC, David...

--
Paul-B
The original and the best
Add comment
Dc 15 April 2005 13:30:40 [ permanent link ]
 On 15 Apr 2005 08:02:48 GMT, "Paul-B" <null@null.invalid>­ wrote:
DC wrote:>
In case there's any confusion (it confused me), this wan't me. I'll>> resist a Paul-like temptation to relabel myself "the real DC". Or>> maybe this one is from the real DC...?>
Everyone knows you're the "surreal" DC, David...

Ideal, I thought... :-)­

David
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