Aerodynamic Streamlining Template: Part-C

[kach22i]

I've read though a few important posts to get the intent of use out of the template. From what I can tell, it was originally intended to be used as a "quick and dirty tool", a start in the right direction for most.

Aerodynamic Streamlining Template: Part-A
http://ecomodder.com/forum/showthrea...part-9285.html

Originally Posted by aerohead

Premise: The template is designed to be a quick and dirty reference for anyone contemplating aft-body streamlining to an existing vehicle or from a "body in white.

Aerodynamic Streamlining Template Part-B
http://ecomodder.com/forum/showthrea...rt-b-9286.html

Aerodynamic Streamlining Template: Part-C
http://ecomodder.com/forum/showthrea...-c-9287-2.html

Originally Posted by aerohead

(1) The ratio does not vary with speed,as it is fixed by the critical Reynolds number which for cars,occurs at about 20-mph.At 20-mph and above,you've established the turbulent boundary layer and Cd minimum which remains constant up to the beginning of transonic flow,at about 250-mph.---------

If I can make a request, when it comes time to do a "Part-D", that it be 3D and include cross sectional information.

There was a thread to turn it into 3D, I'll find it later if someone else does not post it first.

[freebeard]

Possibly this one?

Why does The Template have to be a half body of revolution?

[aardvarcus]

I have been playing with the “new” template, and it appears to be a very close match to the roofline of a seventh generation Toyota Celica. I did a rough PowerPoint overlay using a Celica off the internet. Thank you Aerohead and ChazInMT for all your work in giving us these tools to work with, it is very helpful.

[aerohead]

Originally Posted by kach22i

I've read though a few important posts to get the intent of use out of the template. From what I can tell, it was originally intended to be used as a "quick and dirty tool", a start in the right direction for most.

Aerodynamic Streamlining Template: Part-A
http://ecomodder.com/forum/showthrea...part-9285.html


Aerodynamic Streamlining Template Part-B
http://ecomodder.com/forum/showthrea...rt-b-9286.html


Aerodynamic Streamlining Template: Part-C
http://ecomodder.com/forum/showthrea...-c-9287-2.html


If I can make a request, when it comes time to do a "Part-D", that it be 3D and include cross sectional information.

There was a thread to turn it into 3D, I'll find it later if someone else does not post it first.

Many months ago someone pushed and I went ahead a posted some extra views of the 'Template' I'd been working on.These were just working drawings.
I'm not sure how the thread was even titled.
A literal 'translation' of the 'Template' would be the 1/2-body generated from the 2.5:1 streamlined body of revolution from which it is derived.
It would be 'wide.'
Considering 'conventional ' body dimensions,the plan-view of the 'template' will look more like the low-drag 'section' profile of Hoerner's just to accommodate the more narrow vehicle.

[aerohead]

Originally Posted by aardvarcus

I have been playing with the “new” template, and it appears to be a very close match to the roofline of a seventh generation Toyota Celica. I did a rough PowerPoint overlay using a Celica off the internet. Thank you Aerohead and ChazInMT for all your work in giving us these tools to work with, it is very helpful.

It looks really good!
You'd have an easier time than most pushing that puppy into significant low-drag territory.
Nice project car!

[betasniper]

How would this airfoil fair?

Link has plot data. Has an aftbody ratio of 1.833 (bit long) but this airfoil looks a bit too fast at the start. Havent compared it to new template yet, as I am on my tablet right now, but earlier on the computer I compared to old template and it seemed way faster and longer.

[ChazInMT]

Looks good in the part that counts the most from top out to 50%, this is pretty ideal.



Bigger Version

[aerohead]

Originally Posted by betasniper

How would this airfoil fair?

Link has plot data. Has an aftbody ratio of 1.833 (bit long) but this airfoil looks a bit too fast at the start. Havent compared it to new template yet, as I am on my tablet right now, but earlier on the computer I compared to old template and it seemed way faster and longer.

I would compare it to Mair's boat tail.
He used about one body diameter length to curve his body into a 22-degree slope,and then just maintained a constant slope as in your rendering.
The 'straight' conical sections are easier to fabricate but must be reinforced from the inside,as they have no eggshell strength of the compound curve and will 'tin can'.

[kach22i]

Originally Posted by freebeard

Possibly this one?

Why does The Template have to be a half body of revolution?

I saw that one, it turns up in a search and I think that I've referenced it at some point - thanks.

Originally Posted by aerohead

Many months ago someone pushed and I went ahead a posted some extra views of the 'Template' I'd been working on.These were just working drawings.
I'm not sure how the thread was even titled.

I remember the images, a nice blue 3D teardrop with a tight black wire grid over it. It sort of looked like the spaceship Moya in the Sci-Fi cable TV show called Farscape.

Farscape's Leviathan Moya - WIP - Scifi-Meshes.com Gallery

[freebeard]

Originally Posted by aerohead

Many months ago someone pushed and I went ahead a posted some extra views of the 'Template' I'd been working on.These were just working drawings.
I'm not sure how the thread was even titled.

Bless you. Do this:

• Click on any underlined example of you own name to go to your Profile page
• Scroll to Total Posts
• Click on Find all threads started by aerohead
• Get http://ecomodder.com/forum/search.php?searchid=1558393

My ability to help you ends there.