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Old 17 Dec 2006, 14:41 (Ref:1792876)   #91
MulsanneMike
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Originally Posted by Hammerdown
And are they working properly?

I'm sure your roof panels don't have a 'wing' profile, do they!

Always found the louvres in them rather strange. Are they for flow conditioning? Is the effect you're producing here similar to the Porsche 'wing' arrangement.

I'm also puzzled by the Creation louvre arrangement. As far as you know, does it take all it's cooling air in through the raised nose?

Question to yourself (maybe) and 'Mulsanne Mike'. Are we going to get a nice in-depth tech piece about the Radical at some point?
Whenever Peter wants to open up about it...I'm all ears...I photographed the car at Petit, but figure I have a back log of close to 9 months. Been unable to source the usual photo standard for on-track imagery as well as having documentation holes in other various areas. My usual photograhper isn't cooperating! Anyhow, at some point expect new pages on Creation, Zytek, Lister, RS Spyder, and of course the Radical.
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Old 17 Dec 2006, 14:54 (Ref:1792882)   #92
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Wish we had an Acura powered Radical in the ALMS. I think that combination could probably give the Porsches a good run for their money.
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Old 17 Dec 2006, 15:09 (Ref:1792885)   #93
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OK, since you asked....

Most cars take their cooling air in partially from the conventional 'top of nose ramp' location, and also a significant amount from the diffuser exit. This is why there are some cars with pitch related cooling issues - the diffuser stalls and sends a nice big bubble of stagnant air down the rad duct. I got caught out with this on the very first Bentley in 2001 - because it had been designed as an NA car in 2000 and then gained a turbo engine and two intercoolers. The rads worked fine but the intercoolers , which were fed almost entirely from the diffuser exit, they didnt. The Bentley arrangement from 2003 - and whats on the Audi R10 now, partially alleviates any of this by stuffing high velocity air from the front of the car straight through the suspension and into the rad/intercooler duct. This arrangement takes very little air from the diffuser into the pods, rather it channels that air out below the intakes and through the sides. The two airstreams cross at about 45 deg. It was something we kept fairly quiet about at the time but i think everyone's clocked it now. With a few strategically placed bargeboards (hidden from view) and strakes you get an effect similar to a formula car. If you look at the leading edge of the rad intakes on the doors on the Bentley on Mike's site you will see what i mean.

I guess if you close off the top intake with louvres then you take all of your air from the diffuser exit, yes. I dont know what proportion of the air originally came from the top on the Reynard/DBA/Zytec/Creation.

The louvres in the roof panels are a means of adjusting the balance i talked about, by venting air . No, they are not wing shaped, infact they are single skinned and the top of the 'wing' that you see has no underside internally. They appear to work as intended , yes. The Bentley was exactly the same. The Audi is the opposite.

Not sure about the timescale for a tech article on the Radical - lots of people have been asking almost since day 1. I'm happy to answer stuff for you guys here when i get the time, but please understand somethings i'm going to say i'd rather not go into. We'll see.

Peter
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Old 17 Dec 2006, 16:21 (Ref:1792916)   #94
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Originally Posted by PeterElleray
This arrangement takes very little air from the diffuser into the pods, rather it channels that air out below the intakes and through the sides. The two airstreams cross at about 45 deg.
Excellent, thanks for all that!

I assume the snippet above also explains the stepped shape of the sidepod exits on the new Porsche.

Looking forward to those new tech articles, Mike!
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Old 8 Jun 2007, 00:43 (Ref:1931827)   #95
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Are the new openings in the side for cooling?

http://www.americanlemans.com/Galler...0794243312.JPG

http://www.radicalextremesportscars....ake1/index.php
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Old 20 Aug 2007, 00:26 (Ref:1992409)   #96
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Radical tested a new nose in Spa, but used the old one in race. They should have a more developed version in Silverstone. Overall it's very Audi-like, brake cooling duct is now under headlights.
Endurance-Info article and pictures
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Old 20 Aug 2007, 07:57 (Ref:1992525)   #97
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They also tested a new shock absorber system: http://www.radicalsportscars.com/new...lti4/index.php

I don't know whether they used it at Spa.
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Old 20 Aug 2007, 15:30 (Ref:1992858)   #98
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The SR9 is seen here on the Multi Matics four poster rig. The Radical works team, headed by Paul Thomas, are carrying out development work on a new three shock absorber system. If we told you any more we would have to kill you!
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Old 28 Aug 2007, 04:03 (Ref:1998079)   #99
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multimatic from canada?
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Old 28 Aug 2007, 06:59 (Ref:1998144)   #100
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Originally Posted by bil588
multimatic from canada?

Same company but their UK site
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