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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 02-10-2018, 04:29 PM   #21 (permalink)
Master EcoModder
 
Join Date: Nov 2013
Location: Texas
Posts: 277
Thanks: 7
Thanked 76 Times in 68 Posts
Quote:
Originally Posted by aerohead View Post
I agree.If it's not to the 'template',it does satisfy Rolf Buchheim's 23-degree maximum angle,
Are you saying that I should pull the template rearward to the point that the highest point on the template is at the spoiler tip?

Quote:
Originally Posted by aerohead View Post
Also,I don't think the photo of the Prius is true-length,as in a blueprint.The camera appears to be looking from a forward-biased location,which would throw off any template alignment.
I don't see that bias. I can't see the grill openings, not the license plate. There may be some perspective creeping due to closeness of the camera. I guess I could take a telephoto picture of my Prius to minimize that.

  Reply With Quote
The Following User Says Thank You to Angel And The Wolf For This Useful Post:
aerohead (02-10-2018)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 02-10-2018, 04:36 PM   #22 (permalink)
Master EcoModder
 
Join Date: Nov 2013
Location: Texas
Posts: 277
Thanks: 7
Thanked 76 Times in 68 Posts
Quote:
Originally Posted by aerohead View Post
I would recommend that you put your effort into cleaning up the belly and rear wheel openings to guarantee quality flow to the boat tail.Then see if you can figure out how to get the 'final' diffuser angle as close to 2.8-degrees as you can.
My problem is that a 2.8 degree angle on an extended tail piece will drag on driveway ramps. Maybe doing the 2.8 degree thing, and hinging the tail at the spoiler, and raising it for those abrupt grade changes?
  Reply With Quote
Old 02-10-2018, 04:40 PM   #23 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 8,572
Thanks: 10,900
Thanked 4,542 Times in 2,535 Posts
template/photo aligment

Quote:
Originally Posted by Angel And The Wolf View Post
Are you saying that I should pull the template rearward to the point that the highest point on the template is at the spoiler tip?



I don't see that bias. I can't see the grill openings, not the license plate. There may be some perspective creeping due to closeness of the camera. I guess I could take a telephoto picture of my Prius to minimize that.
The template is always positioned from the point of maximum roof height.From other images of the Prius,it seems to be okay,falling at around 23-degrees,the most aggressive angle allowable.
Really accurate photos are shot with a telephoto lens from at least 200-meters away from the vehicle and produce an image close to what you'd see with a technical image (blueprint).I think your photo was shot much closer to the car,was elevated,and was towards the front of the car,rather than from its geometric center.This will throw things off when attempting to use the template tool.
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
Old 02-10-2018, 04:46 PM   #24 (permalink)
Master EcoModder
 
Join Date: Nov 2013
Location: Texas
Posts: 277
Thanks: 7
Thanked 76 Times in 68 Posts
OK, I'll shoot my own.
  Reply With Quote
The Following User Says Thank You to Angel And The Wolf For This Useful Post:
aerohead (02-10-2018)
Old 02-10-2018, 08:41 PM   #25 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 10,508
Thanks: 2,334
Thanked 3,302 Times in 2,601 Posts
The passenger door window should be perfectly centered in the driver's door window, if you do.

But if you have an adequate computer to run 3D modeling software you could use one of these free models and add your designs to it.

https://www.stlfinder.com/3dmodels/p...del-comparison




My system needs upgrading, I'm struggling to bring a new machine up under the threat of Spectre, Meltdown and BadUSB. I think I need a hardware firewall.

When I did have it together I couldn't merge my modelling with the download, but it was adequate for pulling dimensions. It looked like this:

__________________
.
Walk without rhythm and it won't attract the worm. --fatboy slim
_________________
  Reply With Quote
Old 02-10-2018, 09:43 PM   #26 (permalink)
Master EcoModder
 
Join Date: Nov 2013
Location: Texas
Posts: 277
Thanks: 7
Thanked 76 Times in 68 Posts
Click image for larger version

Name:	2011 prius 2.8.jpg
Views:	3
Size:	32.2 KB
ID:	23475OK, I think I've figured out how to do the 2.8 degree, and still get clearance for driveways:
Attached Thumbnails
Click image for larger version

Name:	2011 prius 2.8 with profiles.jpg
Views:	7
Size:	50.0 KB
ID:	23476  Click image for larger version

Name:	2011 prius 2.8 Highway Position.jpg
Views:	6
Size:	52.2 KB
ID:	23477  Click image for larger version

Name:	2011 prius 2.8 Ramp Position.jpg
Views:	7
Size:	56.7 KB
ID:	23478  
  Reply With Quote
The Following 2 Users Say Thank You to Angel And The Wolf For This Useful Post:
aerohead (02-17-2018), BamZipPow (02-12-2018)
Old 02-10-2018, 09:50 PM   #27 (permalink)
Master EcoModder
 
Join Date: Nov 2013
Location: Texas
Posts: 277
Thanks: 7
Thanked 76 Times in 68 Posts
Quote:
Originally Posted by freebeard View Post

My system needs upgrading, I'm struggling to bring a new machine up under the threat of Spectre, Meltdown and BadUSB. I think I need a hardware firewall.

When I did have it together I couldn't merge my modelling with the download, but it was adequate for pulling dimensions.
I'm primitive. I use Paint XP

Oh, in answer to someone telling me Plexiglas wouldn't be good for looking through when curved, I'll build the tail opaque, and mount rear view cameras in it.
  Reply With Quote
The Following User Says Thank You to Angel And The Wolf For This Useful Post:
aerohead (02-17-2018)
Old 02-10-2018, 11:02 PM   #28 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 10,508
Thanks: 2,334
Thanked 3,302 Times in 2,601 Posts
I use a variety of methods. I assembled this to show these steps:



The original picture was cut up in Photoshop for step 2. Step three was putting tracing paper over the screen and doing a pencil sketch, which was scanned back in. The final step was done back in Photoshop.

In practice the bubble windshield would be three flat facets.
__________________
.
Walk without rhythm and it won't attract the worm. --fatboy slim
_________________
  Reply With Quote
Old 02-11-2018, 12:25 AM   #29 (permalink)
Master EcoModder
 
Join Date: Nov 2013
Location: Texas
Posts: 277
Thanks: 7
Thanked 76 Times in 68 Posts
Quote:
Originally Posted by freebeard View Post
I use a variety of methods. I assembled this to show these steps:
The original picture was cut up in Photoshop for step 2. Step three was putting tracing paper over the screen and doing a pencil sketch, which was scanned back in. The final step was done back in Photoshop.
More skills than I have. I'm impressed
  Reply With Quote
Old 02-11-2018, 01:55 PM   #30 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 10,508
Thanks: 2,334
Thanked 3,302 Times in 2,601 Posts
It's a poor workman that blames his tools, but the 3D software is borked and the scanner is long gone. I'm coasting on fumes.

I bought Photoshop Elements at a Goodwill for IIRC $8.00.

__________________
.
Walk without rhythm and it won't attract the worm. --fatboy slim
_________________
  Reply With Quote
The Following User Says Thank You to freebeard For This Useful Post:
aerohead (02-17-2018)
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com