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View Poll Results: would you be interested in a finnisher/bulldog style cab forward shell
cougar cab forward finnisher style 27 45.00%
cat sx3 cab forward finnisher style 25 41.67%
cougar cab forward bulldog style 20 33.33%
cat sx3 cab forward bulldog style 15 25.00%
Multiple Choice Poll. Voters: 60. You may not vote on this poll

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  #1  
Old 09-12-2011
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Default cab forward shells

would you be interested in a cab forward shell for the cougar and the cat sx3
ill do a poll vote on both if you like
please be advised public vote
I'm thinking finnisher style
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  #2  
Old 10-12-2011
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None of above - BittyDesign Mugen MBX6 Force style.
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Old 10-12-2011
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slightly similar to the finnisher, thats the kinda style i like
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Old 10-12-2011
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I really dislike the Cubic styling of the Finnisher and the Bulldog shells, I'm sorry

I suggest doing cab-forward shells like this:

http://www.ultimatetamiya.com/cars/m...olar-eagle.jpg
http://forum.globaltimes.cn/forum/at...0&d=1256192095
http://kedrix.rc.pagesperso-orange.fr/DSCF0018.jpg

Fighter plane-like cockpit, nicely rounded, flowing and aerodynamic shapes (without creating something resembling an ocean like the TRF501X ). I could scan or make some pictures of drawings I made over the last year of cab-forward shells to show more clearly what I mean.

With that said, I don't own an SX3 However, if I'd buy a 4WD I do have serious interest in an SX3 - that, or a DEX410.
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Old 10-12-2011
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the problem with the rounded approach is they don't provide the down force the square cab does, the flat face works as a air dam,
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Old 10-12-2011
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Quote:
Originally Posted by bigred5765 View Post
the problem with the rounded approach is they don't provide the down force the square cab does, the flat face works as a air dam,
Isn't it possible to create similar/the same results with setup instead of changing a whole shell? I like to think shells can be shaped to primarily serve the cause of aesthetics And if you want proper front downforce, getting a front wing may help?
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Old 10-12-2011
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Quote:
Originally Posted by Origineelreclamebord View Post
Isn't it possible to create similar/the same results with setup instead of changing a whole shell? I like to think shells can be shaped to primarily serve the cause of aesthetics And if you want proper front downforce, getting a front wing may help?
not really, nope , and cant be done right
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Old 10-12-2011
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Quote:
Originally Posted by bigred5765 View Post
not really, nope , and cant be done right
Pityful. I'd still go for a front wing, though that gives a bit more understanding as to why so many of those front cab shells are popping up, often with a front window as square as possible

Of course moving the cab further forward is an option, but I guess a less rounded body would indeed be a more efficient option
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Old 21-12-2011
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I REALLY can't stand cab forward shells, I would honestly rather go a second a lap slower than watch that ugly dog go past me every lap.

Each to their own though...
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  #10  
Old 21-12-2011
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Cab forward bodies I'm sure have their uses-but if it made my car 1 sec a lap faster...I'd still be slower...as I'd purposely ramp it into track markers because its so damn ugly...
P.S. Apologies-not very helpful to the thread I know!
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Old 22-12-2011
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Default So here goes some fun maths.... don't shout if i got it wrong! :)

Next thing we will be buying wind tunnels for our cars, and designing via CFD at £15K a pop. Do you really get significant enough down force at the speeds we are talking about, on the straight I can image we do, but then that is the place that we least want it (DRS a particularly good example).... On the corners the resulting force (I have not worked this…. Yet….) is probably not a great deal of Newton’s, however maybe this might put it into presective.

Car travelling at 45Mph
This is 72.42Km/h
Therefore 20.11667 m/s
Area of the aero device is (model car windscreen) 60mm * 80mm
Therefore H= 80E-3 high by W=60E-3 wide in meters
We do not know the Co-ef of friction for the car so assume it is a perfect 1
Air density at sea level around 1.2
Angle of attatck of the aero surface 30 degrees therefore 0.52 radians

So one method works via F (in Newtons) = 0.5*(L*W*AoA)* ρ*F*V^2

Therefore F=0.5*80*10^-3*60*10^-3*0.52*1.2*1*20.11667^2

If we solve this F = 0.60N so 0.06Kg Force which if you divi by two wheels assuming its is all loading over the front equates to 0.03KgF…

Not a great deal of benefit, but then I guess you are taking what little downforce you have, and are simply moving it towards the front wheels rather than rear ones….. so I hope I got the sums right, but it think the following

I think the body is all about aesthetics and I am not a fan of the cab forward shells, however it would be nice to see a SX3 shell with kind lines, I have a love hate relationship with my current SX3 shell.... Therefore think the Finnisher is nice and I would get one...
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  #12  
Old 24-12-2011
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Quote:
Originally Posted by bigred5765 View Post
would you be interested in a cab forward shell for the cougar and the cat sx3
ill do a poll vote on both if you like
please be advised public vote
I'm thinking finnisher style
Is there not one available by FTW
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  #13  
Old 24-12-2011
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there is but its the ugliest thing you'll ever see
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Old 26-12-2011
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Nice calculations ASKay, couldn't tell you if your right or not but to say the amount of force is insignificant I'm not so sure. 0.06 kg is 60g and in the grand scheme of things not that great, but plenty of people add weight to their cars of about this amount and feel it improves things, so maybe even a small amount of extra downforce is enough to help?
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Old 26-12-2011
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Thank you.... remember the calc is for a high velocity, and not a realistic corner speed, so to add a curve which gives an indication..

I think this is worthy of its own thread..... be good to model the down force v mass and centripetal force downside.



so you can see that at 10mph you get very little back, I have used a different angle of attatck as well 45 degrees, as well as a bigger area...but then at some point the angle of attatck increase will stop working and just create drag, this equation does not identify that change, and I do not know when it breaks.

so at 10mph, adding weights will work way better, but on a fast corner track then an aero method would work better...

appols for temp highjacking thread, back to topic......

p.s. are you thinking/hoping someone will make one for the SX3, or are you thinking of doing one yourself???? if so then I would buy one, just for something different....
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Old 26-12-2011
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and back to my thread
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Old 27-12-2011
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regardless of the physics, cab forward bodies DO make a difference!
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Old 27-12-2011
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Quote:
Originally Posted by bigred5765 View Post
there is but its the ugliest thing you'll ever see
I don't really agree on this, it may not be a stunner but it looks better.

What puzzles me is why they'd make the sidepods so high - it could just as well counteract the forward placed cab (especially since it's rounded)?

Anyway, wouldn't it be easier to develop a front wing set for the SX3? Perhaps even with front wings that mount on the suspension arms themselves? (After all there's loads of open space there to play with).

PS: Sorry to keep going 'off-topic', but if you look at what your question is about, it's whether people would like more front downforce on their SX3s
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Old 28-12-2011
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Was interesting to read that Tom Cockerill test ran a cab forward shell on his Cat, but decided it didnt make enough of an advantage to keep it and has returned to the standard.

My choice would be for the bulldog style as I can see this giving more downforce where its needed (i.e. at the front) - its just unfortunate that it looks ugly as sin!

The finnisher looks way better but too far back to make a big difference I would have thought.
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Old 28-12-2011
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Originally Posted by Cardnim View Post
Was interesting to read that Tom Cockerill test ran a cab forward shell on his Cat, but decided it didnt make enough of an advantage to keep it and has returned to the standard.

My choice would be for the bulldog style as I can see this giving more downforce where its needed (i.e. at the front) - its just unfortunate that it looks ugly as sin!

The finnisher looks way better but too far back to make a big difference I would have thought.
ill make em look good, bulldog and finnisher style
ps tom tried the bulldog and said it gave to much front end which is why he went back to std shell
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