Go Back   EcoModder Forum > EcoModding > Aerodynamics
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 04-12-2012, 12:55 AM   #11 (permalink)
Master EcoModder
 
Sven7's Avatar
 
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
Cleanspeed- glad to help.

Frank and Carlos-
It's probably better to line it up to the rear of the roof in the case of the wagon just to get smooth flow. But in general...

__________________
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
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 04-12-2012, 01:38 AM   #12 (permalink)
(:
 
Frank Lee's Avatar
 
Join Date: Jan 2008
Location: up north
Posts: 12,762

Blue - '93 Ford Tempo
Last 3: 27.29 mpg (US)

F150 - '94 Ford F150 XLT 4x4
90 day: 18.5 mpg (US)

Sport Coupe - '92 Ford Tempo GL
Last 3: 69.62 mpg (US)

ShWing! - '82 honda gold wing Interstate
90 day: 33.65 mpg (US)

Moon Unit - '98 Mercury Sable LX Wagon
90 day: 21.24 mpg (US)
Thanks: 1,585
Thanked 3,555 Times in 2,218 Posts
In #10 the wagon roof poking through means the template needs to go rearward until it doesn't. The Seville looks good now- that's what I'd use on that one.
__________________


  Reply With Quote
Old 04-12-2012, 02:11 AM   #13 (permalink)
Pokémoderator
 
cfg83's Avatar
 
Join Date: Dec 2007
Location: Southern California
Posts: 5,864

1999 Saturn SW2 - '99 Saturn SW2 Wagon
Team Saturn
90 day: 40.49 mpg (US)
Thanks: 439
Thanked 532 Times in 358 Posts
Frank -

Quote:
Originally Posted by Frank Lee View Post
In #10 the wagon roof poking through means the template needs to go rearward until it doesn't. The Seville looks good now- that's what I'd use on that one.
I used to slide the template back until aerohead corrected me :

Quote:
Originally Posted by aerohead View Post
Baja,sorry!,just now catching your post.
Robert is correct with respect to the template.Find the highest point of your roof and align with the point of max camber on the template.
In the above, the center of max roof camber is more important than aligning the end of the car to the template.

I asked the same question here :

http://ecomodder.com/forum/showthrea...ber-12801.html

CarloSW2
__________________

What's your EPA MPG? Go Here and find out!
American Solar Energy Society
  Reply With Quote
Old 04-12-2012, 02:38 AM   #14 (permalink)
Master EcoModder
 
Join Date: Jun 2011
Location: Earth
Posts: 632
Thanks: 28
Thanked 148 Times in 116 Posts
http://ecomodder.com/forum/showthrea...-c-9287-8.html

http://ecomodder.com/forum/showthrea...-c-9287-9.html

I know, my RanchAero overlay isn't on there right. I believe I used Picasa and when I clicked on the overlay it went see-through, so I took a screenshot [Ctrl + Prt Scr].

And I was thinking an "Overlay the aerodynamic streamlining template" thread would be good.
Attached Thumbnails
Click image for larger version

Name:	aerodynamic streamlining template_steps.JPG
Views:	28
Size:	32.3 KB
ID:	10655   Click image for larger version

Name:	aerodynamic streamlining template_steps-1.JPG
Views:	21
Size:	77.7 KB
ID:	10656   Click image for larger version

Name:	RanchAero.JPG
Views:	28
Size:	21.4 KB
ID:	10657  
  Reply With Quote
Old 04-12-2012, 04:05 AM   #15 (permalink)
(:
 
Frank Lee's Avatar
 
Join Date: Jan 2008
Location: up north
Posts: 12,762

Blue - '93 Ford Tempo
Last 3: 27.29 mpg (US)

F150 - '94 Ford F150 XLT 4x4
90 day: 18.5 mpg (US)

Sport Coupe - '92 Ford Tempo GL
Last 3: 69.62 mpg (US)

ShWing! - '82 honda gold wing Interstate
90 day: 33.65 mpg (US)

Moon Unit - '98 Mercury Sable LX Wagon
90 day: 21.24 mpg (US)
Thanks: 1,585
Thanked 3,555 Times in 2,218 Posts
Quote:
Originally Posted by cfg83 View Post
Frank -



I used to slide the template back until aerohead corrected me :



In the above, the center of max roof camber is more important than aligning the end of the car to the template.

I asked the same question here :

http://ecomodder.com/forum/showthrea...ber-12801.html

CarloSW2
Not buying it. I think having the roof poke through the template aft of max camber renders flow downstream of the poke-through compromised and thus the whole project moot. Were those guys thinking of cutting the roof down, not simply adding the Kamm aft of what's there? Were I to do a template overlay on Moon Unit I'd first scale the heights then slide the template aft until there's nothing pokey outey.
__________________


  Reply With Quote
Old 04-12-2012, 04:16 AM   #16 (permalink)
MPGuino Supporter
 
t vago's Avatar
 
Join Date: Oct 2010
Location: Hungary
Posts: 1,808

iNXS - '10 Opel Zafira 111 Anniversary

Suzi - '02 Suzuki Swift GL
Thanks: 831
Thanked 709 Times in 457 Posts
I used a combination of Microsoft Word, the online application pixlr, very basic html coding, and Microsoft Paint for my overlays. Basically, I rotated the vehicle image until it was horizontal (the image was originally rotated about 0.8 degrees). I then performed a transparency operation on my vehicle image using pixlr to make the background transparent. I then used html code to match the sizes of the vehicle and the aero template, as well as matching the 0 degree point of the aero template to the vehicle top as described. After I was satisfied with the result, I pressed <alt>-<prtscrn> to grab the picture as a screen capture, then pasted it into Microsoft paint to save the capture as a PNG image.

This is the result:

  Reply With Quote
Old 04-12-2012, 04:34 AM   #17 (permalink)
Pokémoderator
 
cfg83's Avatar
 
Join Date: Dec 2007
Location: Southern California
Posts: 5,864

1999 Saturn SW2 - '99 Saturn SW2 Wagon
Team Saturn
90 day: 40.49 mpg (US)
Thanks: 439
Thanked 532 Times in 358 Posts
Frank -

Quote:
Originally Posted by Frank Lee View Post
Not buying it. I think having the roof poke through the template aft of max camber renders flow downstream of the poke-through compromised and thus the whole project moot. Were those guys thinking of cutting the roof down, not simply adding the Kamm aft of what's there? Were I to do a template overlay on Moon Unit I'd first scale the heights then slide the template aft until there's nothing pokey outey.
I hope you're right because that means my wagon is good "as is".

CarloSW2
__________________

What's your EPA MPG? Go Here and find out!
American Solar Energy Society
  Reply With Quote
Old 04-12-2012, 04:53 AM   #18 (permalink)
(:
 
Frank Lee's Avatar
 
Join Date: Jan 2008
Location: up north
Posts: 12,762

Blue - '93 Ford Tempo
Last 3: 27.29 mpg (US)

F150 - '94 Ford F150 XLT 4x4
90 day: 18.5 mpg (US)

Sport Coupe - '92 Ford Tempo GL
Last 3: 69.62 mpg (US)

ShWing! - '82 honda gold wing Interstate
90 day: 33.65 mpg (US)

Moon Unit - '98 Mercury Sable LX Wagon
90 day: 21.24 mpg (US)
Thanks: 1,585
Thanked 3,555 Times in 2,218 Posts
Your wagon is good as is, but would be better with a kamm tail extension!
__________________


  Reply With Quote
Old 04-12-2012, 04:57 AM   #19 (permalink)
Master EcoModder
 
Join Date: Apr 2011
Location: Europe
Posts: 364

ZX - '97 Citroen ZX Monaco
OldContinents
90 day: 61.05 mpg (US)
Thanks: 8
Thanked 31 Times in 25 Posts
Template is optimal shape, but it is for best length of 'wing', there are longer wings with different aspect ratio, different kind of aerofoils, maybe longer vehicle would require template to be adapted for such?

My roof is one big level plane, so highest point is almost everywhere, but then again having really good pic from side is something difficult, if car is not photographed directly from the side and from appropriate height there will be big errors, also blueprints are something one really can't trust, those can be way off, but can of course give some idea from shape. There is many things to consider.

Chopping rear end of wagon would make quite nice mini kamm though :P
__________________

  Reply With Quote
Old 04-12-2012, 05:19 AM   #20 (permalink)
Master EcoModder
 
Sven7's Avatar
 
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
"Blueprints can be way off"? It's pretty easy to judge the good ones vs. bad ones.

But I agree with what you're saying about the template. Since the wagon's roof is so flat you can probably stretch the rules a little to put the 0% mark near to the rear of the roof. It will give a better overall flow than pretending you can cut off a chunk of the rear to fit the template.

__________________
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
  Reply With Quote
Reply  Post New Thread






Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com