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Aug 24th, 2023
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Joined: Sep 2006
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Talk Morgan Guru
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Talk Morgan Guru
Joined: Sep 2006
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I thought MMC has a clever software based virual wind tunnel...
Have to talk to the guys at Morgan about it.
But yes. i'll explore the wind tunnel idea as well. The two best would be the ones at Red Bull and Williams. Anyone have any good connections??? The designers have a CFD programme, but it is quite a cut-down version and not of the same accuracy or power of those used by the F1 Teams. Nevertheless, it should be able to show the airflow round the windscreen and the eddies and back flows. It's probably worth talking to Jon Wells about it Peter. P.S. To sort out the under-car airflow on the Aero's there were two bits of twisted metal that could be fitted at the front of the front wings and this helped prevent aerodynamic lift at the rear. Maybe something similar could be fitted to the Plus 8's to help sort out the airflow?
Last edited by Aeroman; 12/03/15 11:50 PM. Reason: To add P.S.
Brian
1970 Morgan Plus 8 - Moss Box (Indigo Blue)
2014 Morgan SP1 (Rocket Red)
2015 Morgan Plus 8 (Rocket Blue)
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Joined: Oct 2006
Posts: 2,403
Talk Morgan Expert
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Talk Morgan Expert
Joined: Oct 2006
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It's the relatively flat front and windscreen that does it - causing air to rise abruptly then swirl back down into the vacuum where the cockpit is.
The better aero of the Aero reduces this effect considerably - smoother front and increased rake on the screen - even more so on the SS racers.
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Joined: Sep 2011
Posts: 14,723 Likes: 149
Member of the Inner Circle
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Member of the Inner Circle
Joined: Sep 2011
Posts: 14,723 Likes: 149 |
There is another issue relating to the behind-screen vortex.
We had to go through the San Gotthard tunnel two years ago when the northbound side was closed and all traffic was in the one tunnel with a lane in either direction. After that experience I vowed never to do it again without a medical mask. The whole inside of the car was covered in a fine dust that was full of fine carbon, metal powder, and who knows what else. I can only imagine what finished up in our lungs.
Peter ![[Linked Image]](http://bradley.it/public_images/drive.jpg)
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Joined: Aug 2013
Posts: 15,794 Likes: 14
Formerly known as Aldermog Member of the Inner Circle
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OP
Formerly known as Aldermog Member of the Inner Circle
Joined: Aug 2013
Posts: 15,794 Likes: 14 |
I thought MMC has a clever software based virual wind tunnel...
Have to talk to the guys at Morgan about it.
But yes. i'll explore the wind tunnel idea as well. The two best would be the ones at Red Bull and Williams. Anyone have any good connections??? The designers have a CFD programme, but it is quite a cut-down version and not of the same accuracy or power of those used by the F1 Teams. Nevertheless, it should be able to show the airflow round the windscreen and the eddies and back flows. It's probably worth talking to Jon Wells about it Peter. P.S. To sort out the under-car airflow on the Aero's there were two bits of twisted metal that could be fitted at the front of the front wings and this helped prevent aerodynamic lift at the rear. Maybe something similar could be fitted to the Plus 8's to help sort out the airflow? Brian, thanks for this: I will follow up with Jon. Do you have a photo of the "bits of twisted metal" fitted? I'm very curious!
Peter,
66, 2016 Porsche Boxster S
No longer driving Tarka, the 2014 Plus 8...
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Joined: Aug 2013
Posts: 15,794 Likes: 14
Formerly known as Aldermog Member of the Inner Circle
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OP
Formerly known as Aldermog Member of the Inner Circle
Joined: Aug 2013
Posts: 15,794 Likes: 14 |
It's the relatively flat front and windscreen that does it - causing air to rise abruptly then swirl back down into the vacuum where the cockpit is.
The better aero of the Aero reduces this effect considerably - smoother front and increased rake on the screen - even more so on the SS racers. But why is the Plus 8 (Aero chassis) so much worse than the 2009 Roadster in this respect?
Peter,
66, 2016 Porsche Boxster S
No longer driving Tarka, the 2014 Plus 8...
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Joined: Feb 2011
Posts: 14,009
Member of the Inner Circle
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Member of the Inner Circle
Joined: Feb 2011
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Is it just me? I really can't see the point of all this discussion about wind tunnels. The car is a traditionally shaped Morgan for heavens sake with the aerodynamics of a brick. Just what benefit is there in sticking it in a wind tunnel or bothering the factory about it? If you can't live with the wind eddies in the cockpit you need to question whether you shouldn't be driving a modern open top instead.
Sorry, rant over, I'll go back in my hole now.
Jays
Former Morgan owner. Gone but hopefully not forgotten!
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Joined: May 2011
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Drive on the Wild Side Part of the Furniture
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Drive on the Wild Side Part of the Furniture
Joined: May 2011
Posts: 4,896 |
Whilst I sort of agree John, there is some benefit in minor changes. For instance I have felt a marked improvement in stability on the front end just by the simple addition of a valance from Cain. I suspect in this case it pushes air flow down and towards the rear of the car rather then allowing it to cause pressure build under the bonnet and effectively lift the car. With respect to the windscreen and cockpit I tend to agree what it is what it is, unless you fancy removing the screen, raking it backward, modifying the brackets, sidescreens and roof then forget it. 
Adrian
Buggered Off, to a modern none leaky car, heart's still ticking
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Joined: Jan 2007
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Talk Morgan Expert
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Talk Morgan Expert
Joined: Jan 2007
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Jays..No its not just you.
Em
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Joined: Aug 2013
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Charter Member
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Charter Member
Joined: Aug 2013
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It's all part of not having a roof! 
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Joined: Dec 2009
Posts: 35,774 Likes: 468
Tricky Dicky Member of the Inner Circle
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Tricky Dicky Member of the Inner Circle
Joined: Dec 2009
Posts: 35,774 Likes: 468 |
It's like a cycle ride - whatever the weather decides to chuck at you you will be involved in it - Simples.
That is why we run a Morgan is it not..to be in contact with the real world not surrounded with a plethora of life saving aids and comfort.
Last edited by 4/4sportsfun; 13/03/15 10:02 AM.
2009 4/4 Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Connaught Green +8 prev
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