Toasterdynamics Episode 14: How Not to Make the Ultimate (?) Wheel Wind Deflectors for the Colt
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- čas přidán 12. 06. 2024
- Investigation of the aerodynamics of the toaster-shaped Mitsubishi Colt Ralliart Z27AG using basic wool tuft analysis and other techniques.
This episode: I borrow some Ferrari aero tricks try to make the best possible front wheel wind deflectors based on the science to reduce drag on the Colt. Mistakes were made but we got there. It is long and just a little bit ASMR.
References / Links:
Q. Jia, M. M. Rashidi, SB. Ju, ZG. Yang. The Influence of Wheel Spoiler Height on Vehicle Drag Reduction.Fluid Mechanics.Vol.1, No. 2, 2015, pp. 11-17.
Sebben, S. Numerical Simulations of a Car Underbody: Effect of Front-Wheel Deflectors. SAE Technical Paper 2004-01-1307, 2004
Cavusoglu OF. Aerodynamics Around Wheels and Wheelhouses. Master's Thesis, Chalmer's University, 2017
odr.chalmers.se/items/61b0c96...
Tiainen V. Aerodynamically optimal tire deflectors? 2021
/ aerodynamically-optima...
Ferrari Superfast 812 Aerodynamics
• Ferrari 812 Superfast ...
Music: "Flying" - Snowplow, "Nineties Pad" - Brian Bolger, "Early Avril" - Unicorn (Royalty-free)
rcoltlyf is not a trained aerodynamicist, mechanic or indeed anything to do with cars. He is a scientist though, likes understanding how things work, and really likes his Colt.
コルトラリーアート! :)
00:00 The low budget but ever-changing intro
00:15 Introduction: Wheel Wind Deflectors and Drag - the Science
02:00 Fixing the Wheel Arch Liners
02:32 Designing and Making the Deflectors
03:50 Designing and Making the Brackets
04:55 Prepping and Painting the Brackets and Deflectors
06:10 Attaching the Deflectors to the Arch Liners
07:34 Installing the Arch Liners and Deflectors to the Car
08:26 Final Thoughts
09:32 Credits
This channel is a goldmine of knowledge, shame i never found it sooner! Earned a sub
Cheers. 390 other subscribers may agree with you. It may be some time though before I can give up my day job. 🤣
agreed, there are a lot of kids that just want power and do bad mods. but this is racing team level stuff and experimentation
True. I could help Alpha Romeo go a bit better in F1 if they just let me at it. Or not. 😉
@@rcoltlyf i mean...you track your car, do mods that actually help your car perform better on the track, experiment new mods, discard the useless mods, quote papers written on the subject.. you know...racing team level stuff. not like other guys * slap a bigger turbo, foot down until engine goes boom *
Guilty as charged, though I have also boomed my engine once. Still pretty sure it's not racing team level stuff - just stuff that I find interesting. Thanks for watching though!
I was thinking of making it aero shaped a long time ago too. :)
I think the height of the detectors matters on the car, so the tire air exposure varies.
Personally i just use PET bottle that 1 cut in half to do this job. The original ABS one get broken easely but PET bottle are bullet prof and cost 0
What is a PET bottle?
@@guitarman376 transparent plastic bottle
Would tuft testing show a flow improvement at the wheel arches? Might be neat to mount a go pro and test the effect at the under plate.
Dunno but good thought. Part of the issue is the challenge in mounting the camera in a way that does not affect the air flow. Really need a wind tunnel!
I read somewhere that wheel deflectors can create lift on the front of the car due to the pressure difference they create?
Yep. In the Sebben (2004) study there was slight increase or decrease in lift front and rear depending on the deflector. I have pasted that table here but dunno what it will look like with formatting.
Model Cl ClF ClR dClF dClR
Base 0.121 -0.001 0.122
Config. 1 0.189 0.056 0.133 0.057 0.011
Config. 2 0.201 0.068 0.133 0.069 0.011
Config. 3 0.115 -0.001 0.116 0 -0.006
Config. 4 0.159 0.038 0.121 0.039 -0.001
Config. 5 0.083 -0.036 0.118 -0.035 0.004
Another study (Dimitriou, I., & Klussmann, S, 2006) also concluded that "The main effect of the wheel spoiler (35mm in this case) is to decrease the total pressure in the wheelhouse. This results in less drag - the smaller value recorded throughout the experimental study - and slightly decreased downforce." So depending on the deflector the lift created is low.