Interesting Aerodynamic Cars (Mike Vetter's ETV, also Avion) - Page 44 - Fuel Economy, Hypermiling, EcoModding News and Forum

aerohead · 07-14-2012, 02:28 PM

Quote:

Originally Posted by seifrob

this is short advertisment movie for tatra 603 filmed in early 60's. Slightly off topic, but, being patriot and Tatra fan, I couldn´t help myself.

No movie tricks, Tatra was driven by factory test driver.

Only in Czech, sorry :-(

P.S. For you without patience:

short-edited version

.

Btw: the sign means "godspeed" ;-]

aerohead · 07-14-2012, 02:41 PM

Quote:

Originally Posted by divedaddy03

Has anybody been watching this project?

What are your thoughts?

It seems like the concept is a step backwards with respect to mass and collision safety.
The body-on-frame would add weight and anyone struck by this vehicle would be at greater risk for injury or death,as there would be compromises to progressive deformation and kinetic energy dissipation upon impact.
The additional mass would frustrate urban stop and go mpg potential.
The 'system' might also require a higher center of gravity.

divedaddy03 · 07-15-2012, 03:49 PM

I hear what you're saying.

So far they are getting 100+ mpg with an ICE...!! Wow, huh?

As far as safety in your mind, is there a better way to build a safe vehicle that's easily put together by a DIYer?

Take a look at their YouTube channel (WIKISPEED crowd funding video - short - YouTube) and build log (WIKISPEED - WIKISPEED), it's interesting what they're doing.

I'm not saying it's the best idea but it's pretty darn cool.

Wayne
SC

Quote:

Originally Posted by aerohead

It seems like the concept is a step backwards with respect to mass and collision safety.
The body-on-frame would add weight and anyone struck by this vehicle would be at greater risk for injury or death,as there would be compromises to progressive deformation and kinetic energy dissipation upon impact.
The additional mass would frustrate urban stop and go mpg potential.
The 'system' might also require a higher center of gravity.

kach22i · 07-15-2012, 07:46 PM

Quote:

Originally Posted by divedaddy03

Take a look at their YouTube channel (WIKISPEED crowd funding video - short - YouTube) and build log (WIKISPEED - WIKISPEED)

I don't remember seeing this before, thank you for posting it.

I'm wondering what kind of turn radius they are getting, but really like the cab-forward aspect.

I've searched for some true side and front views, but so far have found little.

WIKISPEED - Safe

arcosine · 07-15-2012, 08:55 PM

[QUOTE=Cd;316537]

Looks like the Probe IV would have lower drag going backward, if the back er the front were rounded off it wound match the template.

aerohead · 07-16-2012, 07:23 PM

Quote:

Originally Posted by divedaddy03

I hear what you're saying.

So far they are getting 100+ mpg with an ICE...!! Wow, huh?

As far as safety in your mind, is there a better way to build a safe vehicle that's easily put together by a DIYer?

Take a look at their YouTube channel (WIKISPEED crowd funding video - short - YouTube) and build log (WIKISPEED - WIKISPEED), it's interesting what they're doing.

I'm not saying it's the best idea but it's pretty darn cool.

Wayne
SC

It's a tough call.There is very little actual engineering data from which make any judgement.
The first 'race' car which they show I can see getting 100 mpg,if that's with the EPA 'highway' cycle,averaging 49.6 mph. It's got the mass of East Germany's Trabant,and GM's Ultralite so that's good.
The 'race' car,if they'll put the roof on it and roll up the windows, with it's narrow 1-person greenhouse,and small frontal area should be able to squeak by aerodynamically.
I don't believe any of the other body variants will be able to achieve the mpg mentioned.
The chassis remains 'scary' to me.Sure,the occupant of the car may survive a collision in the laboratory under extremely precise collision geometries,but after that I wouldn't know.
And I would not want to be struck by such a vehicle.
Need more data.And those tests are extremely expensive.Many tens of thousands of dollars per crash car.

NeilBlanchard · 07-16-2012, 09:38 PM

The WikiSpeed car never mentions anything about how it makes 100MPG. The aero is nothing special.

California98Civic · 07-21-2012, 10:15 PM

In another thread, aerohead referred to this car, and I did not find it in a ecomodder search. I found it on the web, and here is a pic (below). And this site claims it had Cd 0.26.

Sven7 · 08-10-2012, 03:11 PM

1923 Benz Tropfenwagen (Rumpler patent, Porsche co-design) by kitchener.lord, on Flickr

1935 Auto Union Rekordwagen Typ Lucca. Hans Stuck by kitchener.lord, on Flickr

1921 Rumpler Tropfenwagen chassis by kitchener.lord, on Flickr

orbywan · 08-10-2012, 03:55 PM

Cool photos Sven. Those fairings right behind the front tires are exactly what I had in mind for the Aero RV, or the lower half anyway.

07-15-2012, 08:55 PM	#435 (permalink)
arcosine Master Ecomadman Join Date: Nov 2010 Location: Chicago area Posts: 1,156 sc1 - '98 saturn sc1 Team Saturn 90 day: 43.17 mpg (US) Airplane Bike - '11 home built Carp line Tour rans - '97 rans tailwind tractor - '66 International Cub cadet 129 2002 Space Odyssey - '02 Honda Odyssey EX-L 90 day: 28.25 mpg (US) red bug - '00 VW beetle TDI big tractor - '66 ford 3400 red vw - '00 VW new beetle TDI 90 day: 58.42 mpg (US) RV - '88 Winnebago LeSharo 90 day: 16.67 mpg (US) Thanks: 20 Thanked 337 Times in 227 Posts	[QUOTE=Cd;316537] Looks like the Probe IV would have lower drag going backward, if the back er the front were rounded off it wound match the template. __________________ - Tony

07-16-2012, 09:38 PM	#437 (permalink)
NeilBlanchard Master EcoModder Join Date: May 2008 Location: Maynard, MA Eaarth Posts: 7,908 Mica Blue - '05 Scion xA RS 2.0 Team Toyota 90 day: 42.48 mpg (US) Forest - '15 Nissan Leaf S Team Nissan 90 day: 156.46 mpg (US) Number 7 - '15 VW e-Golf SEL TEAM VW AUDI Group 90 day: 155.81 mpg (US) Thanks: 3,475 Thanked 2,952 Times in 1,845 Posts	The WikiSpeed car never mentions anything about how it makes 100MPG. The aero is nothing special. __________________ Sincerely, Neil http://neilblanchard.blogspot.com/

07-21-2012, 10:15 PM	#438 (permalink)
California98Civic Cyborg ECU Join Date: Mar 2011 Location: Coastal Southern California Posts: 6,299 Black and Green - '98 Honda Civic DX Coupe Team Honda 90 day: 66.42 mpg (US) Black and Red - '00 Nashbar Custom built eBike 90 day: 3671.43 mpg (US) Thanks: 2,373 Thanked 2,174 Times in 1,470 Posts	VW Auto 2000 In another thread, aerohead referred to this car, and I did not find it in a ecomodder search. I found it on the web, and here is a pic (below). And this site claims it had Cd 0.26. Attached Thumbnails __________________ See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.

08-10-2012, 03:11 PM	#439 (permalink)
Sven7 Master EcoModder Join Date: Aug 2011 Location: Warren, MI Posts: 2,456 Boo Radley - '65 Ford F100 90 day: 13.28 mpg (US) Thanks: 782 Thanked 669 Times in 411 Posts	1923 Benz Tropfenwagen (Rumpler patent, Porsche co-design) by kitchener.lord, on Flickr 1935 Auto Union Rekordwagen Typ Lucca. Hans Stuck by kitchener.lord, on Flickr 1921 Rumpler Tropfenwagen chassis by kitchener.lord, on Flickr __________________ He gave me a dollar. A blood-soaked dollar. I cannot get the spot out but it's okay; It still works in the store

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08-10-2012, 03:55 PM	#440 (permalink)
orbywan EcoModding Apprentice Join Date: Jul 2010 Location: Tucson, AZ Posts: 245 Thanks: 111 Thanked 163 Times in 63 Posts	Cool photos Sven. Those fairings right behind the front tires are exactly what I had in mind for the Aero RV, or the lower half anyway.