Aerodynamic Discussion Thread
#501
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Looks to me like that isn't NACA ducts for the purpose of getting the air above the diffuser, that's literally two diffusers, one in front of the other. Moving air to the top of the second diffuser is a byproduct of having the first one in front of it, but it's not the goal, the goal is to have two diffusers (awesome)
-Ryan
-Ryan
Last edited by ThePass; 04-15-2014 at 07:19 PM.
#504
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John, according to my copy of Competition Car Aerodynamics, for a car with a quote unquote stock, "dirty" undercarriage (ie, no flat floor here - a nascar type sedan is the particular model used, but should apply equally well to our miatas) the effect of a front splitter is drastically improved when it is coupled with a front diffuser compared to a front airdam with a splitter sticking out the front and no aero behind the airdam.
When I create my front splitter, it will include a diffuser section running back to where the stock undertray mounts now.
When I create my front splitter, it will include a diffuser section running back to where the stock undertray mounts now.
#506
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K24 - from that description I'm picturing a bubble that arcs up and then drops back down when it reaches the front subframe. Or was he suggesting a regular diffuser that would arc up and basically send air at/over the front subframe rather than below it?
I have diffusers in my front splitter, I just haven't put pictures of it out there
-Ryan
I have diffusers in my front splitter, I just haven't put pictures of it out there
-Ryan
#508
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From what I posted up on the page before. They talk about equaling the rear wing out with active aero under the front. I am guessing in saying that it prob is the 2 front diffusers in front of the Front Tires.
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-Ryan
#510
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I think we all agree, and should now consume significant numbers of pints together. Come to Portland bitches! I'll buy the first round.
The active underbody aero part of the P1 is fascinating - and is what makes this truly a supercar in my humble opinion. As evidenced numerous times on this forum, anybody can slap a powerful engine into a responsive chassis and add some home-grown aero and embarrass Very Expensive Cars on track. True active aero management requires tools beyond those available to us DIY'ers. To do it in such a way that it is seamless to the driver is impressive.
The active underbody aero part of the P1 is fascinating - and is what makes this truly a supercar in my humble opinion. As evidenced numerous times on this forum, anybody can slap a powerful engine into a responsive chassis and add some home-grown aero and embarrass Very Expensive Cars on track. True active aero management requires tools beyond those available to us DIY'ers. To do it in such a way that it is seamless to the driver is impressive.
#513
splitter
This is the splitter made for the Catfish. The two rear mounting bolts connect to the Miata K-member. Without spacers at the K-member--at least on the Catfish--the splitter angles upward slightly. I use spacers to flatten it out, and regardless feel a noticeable difference in down force, especially on the brakes.
Anyone with basic skills could make this part, or trace it and have a local shop plasma cut it from a sheet of aluminum.
Anyone with basic skills could make this part, or trace it and have a local shop plasma cut it from a sheet of aluminum.
#516
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From what I posted up on the page before. They talk about equaling the rear wing out with active aero under the front. I am guessing in saying that it prob is the 2 front diffusers in front of the Front Tires. https://www.youtube.com/watch?v=48LEh-gv85Y
McLaren P1 Under Diffuser Looking Forward
McLaren P1 Under Front Splitter Looking back towards the right front tire
McLaren P1 Underbody
McLaren P1 Under Front Left Tire
McLaren P1 Rear Cooling Fans with Carbon Blades and Shroud
McLaren P1 Back
Love That Paint
Last edited by 1993ka24det; 04-19-2014 at 04:37 PM.
#518
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The more pictures I see, the better and better the McLaren aero gets. Fantastic.
There is an article in Racecar Engineering this month on the Porsche 919 LMP, but it does not show much on the aerodynamics unfortunately. They do however have an article on testing the effects of rake and ride height on the Praga R1 in a wind tunnel. The testing showed what generally applies to undertray aerodynamics. Downforce is sensitive to ride height, and the bias of the undertray downforce shifts fore and aft with rake; increasing rear ride height (or decreasing the front) shifts the undertray downforce balance (center of effort) forward.
Here is the Praga R1
http://www.roadandtrack.com/car-revi...-on-our-shores
There is also a good article about the effects of yaw on wing downforce and what happens when you add intermediate spill plates.
There is an article in Racecar Engineering this month on the Porsche 919 LMP, but it does not show much on the aerodynamics unfortunately. They do however have an article on testing the effects of rake and ride height on the Praga R1 in a wind tunnel. The testing showed what generally applies to undertray aerodynamics. Downforce is sensitive to ride height, and the bias of the undertray downforce shifts fore and aft with rake; increasing rear ride height (or decreasing the front) shifts the undertray downforce balance (center of effort) forward.
Here is the Praga R1
http://www.roadandtrack.com/car-revi...-on-our-shores
There is also a good article about the effects of yaw on wing downforce and what happens when you add intermediate spill plates.
Last edited by ZX-Tex; 04-20-2014 at 10:53 AM.