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photo of a Coupe in a wind tunnel
#1000178
13/03/2010 00:22
13/03/2010 00:22
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MichaelZ
Unregistered
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MichaelZ
Unregistered
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Maybe there were some pics in brochures or commercials?
It usually shows airflows around the body...
Anyone?
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Re: photo of a Coupe in a wind tunnel
[Re: ]
#1000585
14/03/2010 01:21
14/03/2010 01:21
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Per
Unregistered
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Per
Unregistered
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never seen any, other than the fact of CX 0.31 which is pretty low drag. I suppose the LE/Plus-kit affected that some.. 0.305?
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Re: photo of a Coupe in a wind tunnel
[Re: ]
#1000623
14/03/2010 11:20
14/03/2010 11:20
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Joined: Feb 2006
Posts: 5,408 Essex
Trappy
Club member 7306
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Club member 7306
Forum is my life
Joined: Feb 2006
Posts: 5,408
Essex
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Autocar and FIAT quote 0.33 but I have seen 0.31 and 0.32 posted around the internet.
F****** b****** thing...
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Re: photo of a Coupe in a wind tunnel
[Re: Trappy]
#1000671
14/03/2010 12:35
14/03/2010 12:35
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Joined: Dec 2005
Posts: 4,839 Haslemere, Surrey
Mark_S
Forum is my job
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Forum is my job
Joined: Dec 2005
Posts: 4,839
Haslemere, Surrey
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I was going to post on this general subject. I have always noticed with the Coupe, unlike any other car I have dad, when I look in rear view mirror in rain, I see the spray coming together (both sides pulling in) in a vortex. I asssumed this was the result of great aerodynamics. Other cars just show a mass of uncordinated spray, with no form or shape. The coupe is just so special
997 C4S
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Re: photo of a Coupe in a wind tunnel
[Re: ]
#1000715
14/03/2010 13:42
14/03/2010 13:42
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MichaelZ
Unregistered
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MichaelZ
Unregistered
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never seen any, other than the fact of CX 0.31 which is pretty low drag. I suppose the LE/Plus-kit affected that some.. 0.305? Even 0,32 is just between Farrari Enzo (0,30) and Lamborghini (0,33)! )))) The questions is that I'm in procees of making a custom kit for my coupe. Small wide body + diffusors + bottom panels etc. Minimum of looking, maximum of efficiency on a track. So my idea is to make small aerodinamic elements, that won't look like my grandma's favorite bench, but will do their job.
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Re: photo of a Coupe in a wind tunnel
[Re: ]
#1000721
14/03/2010 13:52
14/03/2010 13:52
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Joined: Feb 2006
Posts: 5,408 Essex
Trappy
Club member 7306
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Club member 7306
Forum is my life
Joined: Feb 2006
Posts: 5,408
Essex
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Even 0,32 is just between Farrari Enzo (0,30) and Lamborghini (0,33)
It's also higher than a Vauxhall Calibra  The coop does well aerodynamically because of it's low frontal area of 21.6 feet. The CDA (CD x frontal area) is therefore pretty good in any company. The thing is, those cars that generate good downforce also produce more drag. A Noble M400 is a good extreme example. It's very good from 0-120mph and on track, but you only need to look at the post 120mph performance and top speed and you wonder where that 425bhp went. All that downforce starts to work against it, both in terms of drag and of course, extra 'weight'. So my idea is to make small aerodinamic elements, that won't look like my grandma's favorite bench, but will do their job.
The question is, how will you ever know if it's working?
F****** b****** thing...
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Re: photo of a Coupe in a wind tunnel
[Re: Trappy]
#1000840
14/03/2010 17:23
14/03/2010 17:23
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MichaelZ
Unregistered
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MichaelZ
Unregistered
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Even 0,32 is just between Farrari Enzo (0,30) and Lamborghini (0,33)
It's also higher than a Vauxhall Calibra  The coop does well aerodynamically because of it's low frontal area of 21.6 feet. The CDA (CD x frontal area) is therefore pretty good in any company. The thing is, those cars that generate good downforce also produce more drag. A Noble M400 is a good extreme example. It's very good from 0-120mph and on track, but you only need to look at the post 120mph performance and top speed and you wonder where that 425bhp went. All that downforce starts to work against it, both in terms of drag and of course, extra 'weight'. So my idea is to make small aerodinamic elements, that won't look like my grandma's favorite bench, but will do their job.
The question is, how will you ever know if it's working? Well, we have a wind tunnel here in University of aviation ))) And also some elements will work in anycase - for example flat bottom o some rear diffusor. And they also look better then any spoilers etc...
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Re: photo of a Coupe in a wind tunnel
[Re: Jimbo]
#1000854
14/03/2010 17:47
14/03/2010 17:47
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MichaelZ
Unregistered
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MichaelZ
Unregistered
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Is your tunnel large enough to fit a coupe inside They fit an airplane there ))))
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Re: photo of a Coupe in a wind tunnel
[Re: ]
#1000858
14/03/2010 18:01
14/03/2010 18:01
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Joined: Jul 2008
Posts: 12,644 Watford
MarioCirillo
Ex El Presidente
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Ex El Presidente
I AM a Coop
Joined: Jul 2008
Posts: 12,644
Watford
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Fancy putting one of our coupes in there? ;-)
Proud Owner of Rosso Speed LE041
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Re: photo of a Coupe in a wind tunnel
[Re: MarioCirillo]
#1000861
14/03/2010 18:11
14/03/2010 18:11
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MichaelZ
Unregistered
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MichaelZ
Unregistered
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Fancy putting one of our coupes in there? ;-) I will better make a small model for tests )))) Always dreamed about it! They do so with the planes development btw )
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Re: photo of a Coupe in a wind tunnel
[Re: Jimbo]
#1001605
16/03/2010 08:31
16/03/2010 08:31
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ngspawn
Unregistered
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ngspawn
Unregistered
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covered wheel rims will do a great job. flat fuel cap will add several km/h also
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Re: photo of a Coupe in a wind tunnel
[Re: Jimbo]
#1001650
16/03/2010 10:40
16/03/2010 10:40
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Nobby
Unregistered
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Nobby
Unregistered
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Boeing didn't see the funny side of us trying to fly it across the room (which it didn't do very successfuly). 
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Re: photo of a Coupe in a wind tunnel
[Re: Jimbo]
#1002803
18/03/2010 02:26
18/03/2010 02:26
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Redd
Unregistered
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Redd
Unregistered
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pure CF doesnt conduct electricity. CF sandwich with a wire mesh in between should, just like a Faraday cage.
as strict as the FAA are with these things, i cant believe Boeing would have overlooked this most well known lightning strike issue with the 787.
redd
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Re: photo of a Coupe in a wind tunnel
[Re: ]
#1002844
18/03/2010 09:16
18/03/2010 09:16
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Joined: Dec 2005
Posts: 9,707 Gone
Jimbo
Je suis un Coupé
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Je suis un Coupé
Joined: Dec 2005
Posts: 9,707
Gone
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Yep you've got it spot on Red, they lay a mesh under the upper composite layer, however, that mesh needs to be bonded at every single point throughout the entire airframe for it to work, also, think about this logically, pass a few million volts through a thin wire mesh that's encased in a substance that doesn't conduct so well. I bet the structure will delaminate and lose all it's strength ! It's a problem with metal airframes too, rivets melt and reform with a lightening strike, a rivet that's done that offers no structural strength at all. I'm not sure how far off topic we are at the moment. ? Has anyone had a lightening strike in a coupe, or to get it right back on track, has anyone had a lightening strike in a wind tunnel
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Re: photo of a Coupe in a wind tunnel
[Re: Jimbo]
#1003554
19/03/2010 04:20
19/03/2010 04:20
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Redd
Unregistered
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Redd
Unregistered
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hehe sorry. i go all tingly whenever anyone starts talking aero...  redd
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