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Forum: Aerodynamics

10-06-2017, 03:46 PM

Replies: 5

Views: 1,496

Posted By mikesheiman

Recommended rear shape and/or ducting

I have the following project trike (4-seater, like an extended Polaris Slingshot, with 3 wheels to make it street legal as a motorcycle) and am working on the tail end.
...

Forum: Aerodynamics

10-06-2017, 12:30 AM

Replies: 20

In cabin wind/"redneck a/c" aerodynamics

Views: 3,129

Posted By mikesheiman

Freebeard and anyone still here... This is...

Freebeard and anyone still here...

This is roughly what I'm trying to do (link)

https://1drv.ms/u/s!ApZC8QFk-svmgXNKbTVyLAgQpdaF

According to Flow Illustrator it
can work...what comes out...

Forum: Aerodynamics

10-05-2017, 08:52 AM

Replies: 20

In cabin wind/"redneck a/c" aerodynamics

Views: 3,129

Posted By mikesheiman

Updated/fixed image

Sorry about that, just updated the image link. Will upload a wind tunnel analysis sketch soon showing where internal air ducting is now (wheel well tops and upper back of car).

Forum: Aerodynamics

10-03-2017, 07:25 PM

Replies: 20

In cabin wind/"redneck a/c" aerodynamics

Views: 3,129

Posted By mikesheiman

In cabin wind/"redneck a/c" aerodynamics

Any clue how to improve this to increas
aerodynamics while ventilating the cabin?
I am curious if the rear roof angle is ideal and if there is an ideal hole placement/size in the back to empty air...

Forum: Aerodynamics

10-02-2017, 02:33 PM

Replies: 18

Aerodynamics behind tires (to add a fairing or leave open?)

Views: 4,975

Posted By mikesheiman

Granted, something like having a virtually...

Granted, something like having a virtually non-existent wheel well gap on the inside of the front wheel for a standard shaped car (and almost no air gathering behind the front wheel) may be ideal,...

Forum: Aerodynamics

09-01-2017, 06:36 PM

Replies: 7

Homebuilt trike aeromodding

Views: 1,056

Posted By mikesheiman

Homebuilt trike aeromodding

https://m.facebook.com/story.php?story_fbid=10155671466737445&id=507862444

Curious

*) What do you think the Cd (not counting area) is?
*) Where do you think some areas for improvement are /...

Forum: Aerodynamics

06-10-2017, 03:25 PM

Replies: 6

Too much or too little taper and rear slope, opinions?

Views: 963

Posted By mikesheiman

Too much or too little taper and rear slope, opinions?

https://scontent.xx.fbcdn.net/v/t1.0-9/19029193_10155387165622445_303403280594615736_n.jpg?oh=6fbf44ef19ec51162f72ecadbbefe12b&oe=59E9BD7A

Too much or too little taper and rear slope, opinions?
I...

Forum: Aerodynamics

06-30-2016, 07:29 PM

Replies: 2

Bottom tire area fairing/brush

Views: 1,195

Posted By mikesheiman

Bottom tire area fairing/brush

I'm thinking about using a light broom or set of broom bristles to form triangular fairings around the front and rear tires of my car. What are some possible safeguards or loopholes in this...

Forum: Aerodynamics

06-30-2016, 12:50 AM

Replies: 28

Worse than a fastback design?

Views: 4,362

Posted By mikesheiman

Ok, so it tapers in too quickly...would it...

Ok, so it tapers in too quickly...would it actually be better off as a hatchback e.g. no taper at all? I know even some hatchbacks get about 0.3 CD.

And I think I see what you mean about the...

Forum: Aerodynamics

03-16-2015, 11:09 AM

Replies: 35

Sub-Cd 0.09 paradigm

Views: 8,575

Posted By mikesheiman

The closest thing I can think in any sort of...

The closest thing I can think in any sort of development form is Neil Blanchard's "Car Ben" design here...

Forum: Aerodynamics

03-15-2015, 11:41 PM

Replies: 35

Sub-Cd 0.09 paradigm

Views: 8,575

Posted By mikesheiman

Madison Avenue

Agreed!
Personally, I'm attempting to home-build an electric car (really a trike shaped like an enclosed car) with a sub-0.2 Cd that sits 4 and weighs at least under 1500 pounds (and I'm...

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