On-Highway airflow testing with an M235xi

Zooks527 · 10-15-2015, 07:28 AM

The results of my one-data-point totally-unscientific airflow testing across my M235 at 72 mph? It appears that air is channeled from the edges of the car over the center, with a large rotor behind the car forcing air down to the road surface.

And the test subject looks somewhat unhappy with the process, through he came through unscathed.

Cyberdemon · 10-15-2015, 07:40 AM

If you had a convertible he probably would have landed in the back seat.

jmwilson125 · 10-15-2015, 05:58 PM

Haha this is great!

overcoil · 10-15-2015, 06:42 PM

I'd never seen a video like this - really rather amazing. ��

Transfer · 10-15-2015, 08:25 PM

Wow. Nicely captured and good job to the hawk for not bouncing down the highway!

nike001 · 10-15-2015, 10:24 PM

Of course air is being forced downwards. Rear downforce

Oakleyguy · 10-15-2015, 10:34 PM

What dash cam are you running?

dt20011 · 10-15-2015, 10:45 PM

Ohh man! lol

MrBucket · 10-15-2015, 11:28 PM

Quote:

Originally Posted by nike001

Of course air is being forced downwards. Rear downforce

Actually, it should be shooting up after the car if there's downforce being produced on the top surface of it.

Zooks527 · 10-16-2015, 05:06 AM

Quote:

Originally Posted by Oakleyguy

What dash cam are you running?

Lukas LK-7200 in the front, Mobius ActionCam Wide Angle in the rear. The equipment is a couple of years old. I moved the setup over from my 335 this year.

Details and cost in a post at the other guys: http://www.bimmerfest.com/forums/sho...6&postcount=10

krhodes1 · 10-16-2015, 10:18 PM

That hawk did nice touch and go! Good flying!

dan99 · 10-16-2015, 10:41 PM

That was beautiful

ORIGIN M. · 10-17-2015, 03:20 AM

Thank God you were not driving 55MPH.

Zooks527 · 10-17-2015, 06:22 AM

Quote:

Originally Posted by red-sauerkraut

Thank God you were not driving 55MPH.

Yeah, I thought the song that was just starting was an appropriate coincidence.

mike@x-ph.com · 10-19-2015, 01:47 PM

Impressed with this Hawk's handling

10-15-2015, 07:28 AM	#1
Zooks527 Captain 310 Rep 886 Posts Drives: 2015 M235xi / 2005 Tacoma 4x4 Join Date: Jul 2009 Location: Mansfield, MA iTrader: (0)	On-Highway airflow testing with an M235xi The results of my one-data-point totally-unscientific airflow testing across my M235 at 72 mph? It appears that air is channeled from the edges of the car over the center, with a large rotor behind the car forcing air down to the road surface. And the test subject looks somewhat unhappy with the process, through he came through unscathed. __________________ 2015 M235xi coupe, Black Sapphire Metallic, Black Leather, Fineline Stream trim, Steptronic, xDrive, ZPP, ZTP, ZCW, ZDA, ZDB, 5DP, hk w/BimmerTech amp, Enhanced BT Prior 40 years: 67 BelAir wagon / 68 LeMans Tempest / 70 Mustang Mach 1 / 72 El Dorado / 78 Corvette / 81 Subaru GL wagon 4WD / 83 s10 Blazer 4x4 / 85 Bronco 4x4 / 96 Bronco 4x4 / 04 Passat 4mo / 09 BMW 335xi
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10-15-2015, 07:40 AM	#2
Cyberdemon Brigadier General 1538 Rep 3,331 Posts Drives: 2020 X5 40i, 2018 M3 Comp Join Date: Jun 2012 Location: Long Island NY iTrader: (3)	If you had a convertible he probably would have landed in the back seat. __________________ Current: '20 X5, '18 M3 ZCP Previous: '11 E90 335i, '11 E90 M3, '16 VW GTI, '15 M235i, '13 335i, '08 TL-S, '00 Corvette
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10-15-2015, 05:58 PM	#3
jmwilson125 Major 341 Rep 1,184 Posts Drives: 2016 M235i Join Date: Feb 2015 Location: Somerville, Ma iTrader: (0)	Haha this is great!
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10-15-2015, 06:42 PM	#4
overcoil Major General 3074 Rep 5,577 Posts Drives: M235i 6spd Join Date: Dec 2013 Location: Mid-Atlantic iTrader: (0)	I'd never seen a video like this - really rather amazing. ��
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10-15-2015, 08:25 PM	#5
Transfer Major General 5251 Rep 5,874 Posts Drives: Bronco Wildtrak, Tesla MYP Join Date: Mar 2010 Location: Issaquah, WA iTrader: (1)	Wow. Nicely captured and good job to the hawk for not bouncing down the highway!
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10-15-2015, 10:24 PM	#6
nike001 Captain 312 Rep 818 Posts Drives: 2018 718 Cayman Join Date: Apr 2011 Location: US iTrader: (2)	Of course air is being forced downwards. Rear downforce
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10-15-2015, 10:34 PM	#7
Oakleyguy Resident Engineer 135 Rep 748 Posts Drives: Land Cruiser Join Date: Oct 2008 Location: Denver, CO / Tulsa, OK iTrader: (0) Garage List 2014 Toyota URJ200 [0.00] 2017 BMW M2 [0.00] 2015 BMW M4 [10.00] 2005 Toyota UZJ100 [0.00]	What dash cam are you running? __________________ ///M4 (SO/BLK/BLK) Exec, LED, Blk 19s, HK, 6MT <- SOLD ///M2 (LBB), Exec, 6MT <- SOLD 2014 Land Cruiser, Slee Sliders, OME Lift, ARB Onboard Air European Delivery Journal & F8X Door Rattle Fix Machine Shop Directory - www.mfgcenter.com
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10-15-2015, 10:45 PM	#8
dt20011 Lieutenant 262 Rep 528 Posts Drives: 2014 M235i Join Date: May 2014 Location: SoCal iTrader: (0)	Ohh man! lol
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10-16-2015, 10:18 PM	#11
krhodes1 Colonel 1436 Rep 2,527 Posts Drives: 2011 328i Wagon Join Date: Feb 2011 Location: Westbrook, Maine, Port Charlotte, Florida iTrader: (1) Garage List 2011 128i [10.00] 2011 BMW 328i Touring [10.00]	That hawk did nice touch and go! Good flying! __________________ '11 328! Touring - Tasman on Chestnut, 6spd manual, factory upside-down "i" option '11 128i Convertible - Space Gray on Savannah Beige, 6spd manual, also '14 Mercedes-Benz E350 wagon, '95 Land Rover Discovery, '74 Triumph Spitfire
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10-16-2015, 10:41 PM	#12
dan99 Captain 138 Rep 621 Posts Drives: 01' 330xi / 15' M235i Join Date: Apr 2011 Location: Neb iTrader: (0)	That was beautiful
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10-17-2015, 03:20 AM	#13
ORIGIN M. Banned 3160 Rep 9,134 Posts Drives: ///M Join Date: Oct 2007 Location: Northern Hemisphere iTrader: (0)	Thank God you were not driving 55MPH.
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10-19-2015, 01:47 PM	#15
mike@x-ph.com Joint Chiefs of Staff 24171 Rep 190,750 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	Impressed with this Hawk's handling __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
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