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Aerodynamic Analysis - RCZ 2010

Body panels, spoiler, wipers, mirrors and windows, feline pack etc

Post Tue Apr 25, 2017 7:03 pm
Pkearney Newbie
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HI All,

New to the forum.

I have a question regarding the aerodynamics of the 2010 RCZ.

I'm currently carrying out an aerodynamic analysis of the car and the real affect the rear spoiler has on the vehicle.

Has anyone got any other research they know of or have carried out?

I'm more than happy to share any findings with interested parties.

Thanks in advance,

Phill


Post Tue Apr 25, 2017 7:43 pm
DKZ5745 User avatar

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I have nothing, but it would be a very interesting thing to find out :eusa-think:
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Post Wed Apr 26, 2017 6:23 am
neilgsxr69 User avatar

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Hi, I've also been wondering about the effect the rear spoiler has on the aerodynamics of the car my spoiler lifts to full height at 97mph (allegedly officer :eusa-whistle: ) so if we manually raise and drive around with it in the higher position are we actually reducing our fuel economy? I would think so but by how much would be interesting to know :eusa-think:
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Post Wed Apr 26, 2017 7:42 am
ONLY AEK User avatar

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DKZ5745 wrote:
I have nothing, but it would be a very interesting thing to find out :eusa-think:



+1
thp 156 with 268hp!!!!!!!!

Post Wed Apr 26, 2017 9:01 am
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TBH I doubt the active spoiler adds anything at all to the downforce of the car unless you're going a an incredible (and illegal) rate of knots. And even then it's probably pretty negligible.

It does, however, more than make up for that in coolness factor when it activates at speed. 8-)

Post Wed Apr 26, 2017 9:05 am
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I was wondering this also, purely due to averaging 6.1 litres per 100km on a recent road trip. Given the size of the car I thought that was pretty impressive and wondered whether the aerodynamics had anything to do with this (particularly as mums 308 with the same engine doesn't get the same economy on the highway and mine had bit heavy wide wheels / tyres on it).

Post Wed Apr 26, 2017 10:41 am
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I've heard that the active spoiler closes at speeds over 120mph, as the car produces enough downforce with the rear window, without the need for the spoiler!!!!!

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Tia2 is a 2013 RCZ Magnetic in Black with a 2litre diesel engine
Upgraded Peugeot sat-nav now has 7 digit postcode, safety alerts and updated maps
Other mods include door catch covers, rcz puddle lights, quad exhaust tips
Tia3 is a 2015 RCZ-R in Mercury Grey with a 1.6litre petrol engine, oh and 270 bhp
Other mods include door catch covers, rcz puddle lights
Both have dash cams front and back

Post Wed Apr 26, 2017 11:28 am
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Now there's a challenge if ever I heard one :eusa-think:
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Post Wed Apr 26, 2017 11:30 am
DKZ5745 User avatar

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The only problem would be that at over 120 mph I would have 1 eye on the road in front, 1 eye scanning for :law-policered: and I've run out of eyes to check if the spoiler has gone back down :eusa-whistle:
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Post Wed Apr 26, 2017 12:43 pm
DRTDVL Senior Member
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I can say at over 120mph I wasn't looking to see if the spoiler was up... I had set it to be up. The spoiler might be like the early tt spoiler where it's there to provide some stability to the car when at speed.

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Post Thu Apr 27, 2017 1:56 pm
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I've been investigating this as part of my dissertation at university and all results are pointing to a reduction in lift at higher speeds (to be expected).

Simulations @ 95mph with a RCZ 2010 CAD Model

No spoiler - 775N of lift
Stage 1 - 635N of lift 18% reduction on No spoiler
Stage 2 - 504N of lift 35% reduction on No spoiler

Simulations with a 3d scan of my actual RCZ (dings and all) to follow, so ill keep you all posted.

Post Thu Apr 27, 2017 3:19 pm
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:text-goodpost:
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Post Thu Apr 27, 2017 11:08 pm
DRTDVL Senior Member
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you might like this then: http://mdx2.plm.automation.siemens.com/ ... 0148_0.pdf

we have been looking at doing something similar for mine and my friends racecars....

this is fun too:

https://www.grc.nasa.gov/www/k-12/FoilSim/index.html

https://www.grc.nasa.gov/www/k-12/airpl ... lsimu.html

Post Fri Apr 28, 2017 10:56 am
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I think with a little bit of plagiarism that could be an A* for the OP :thumbup:
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Post Sat May 06, 2017 6:27 pm
Ian Vickers Newbie
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Other than raising the spoiler manually, does anyone know how the spoiler could be made at legal speeds, say mid 40s and 70ish?

Post Tue May 09, 2017 12:46 pm
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tianorth wrote:
I've heard that the active spoiler closes at speeds over 120mph, as the car produces enough downforce with the rear window, without the need for the spoiler!!!!!

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Having had a THP156 gen 1 RCZ for a week years ago and having pushed it to 140MPH I don't recall the spoiler to retract at above 120. I remember being it up there. And I remember the 156THP not being very sure-footed at those speeds.
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