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Search took 0.02 seconds. Search: Posts Made By: aardvarcus
Forum: EcoModding Central 12-04-2020, 08:29 AM
Replies: 188
Views: 37,852
Posted By aardvarcus
Everyone, It has been a while since I...

Everyone,

It has been a while since I updated this thread. I went round and round on drag reducing designs and ultimately landed on tapering the rear sides of the cargo area in.

I have been...
Forum: Aerodynamics 12-03-2020, 09:35 PM
Replies: 111
Views: 15,709
Posted By aardvarcus
Some more progress on welding the vehicle back...

Some more progress on welding the vehicle back together since I last posted. I got the structural welding on the passenger side mostly finished, and got the roof bows shortened and rewelded. Today I...
Forum: Aerodynamics 12-03-2020, 12:25 PM
Replies: 272
Views: 19,898
Posted By aardvarcus
Maybe person A was expecting person B to read up...

Maybe person A was expecting person B to read up on it a bit... not take the first sketch they find and build it.

I am aware of the occasional heat issues. Like when weather acts crazy and it gets...
Forum: Aerodynamics 12-03-2020, 11:50 AM
Replies: 272
Views: 19,898
Posted By aardvarcus
Since people like analogies so much… This...

Since people like analogies so much… This conversation reminds me of something else…

Person A:
Did you know you can heat your house from the sun? South facing windows, size the overhangs to...
Forum: Aerodynamics 12-03-2020, 09:07 AM
Replies: 272
Views: 19,898
Posted By aardvarcus
Aeromcaeroface, If "any" aka infinite is...

Aeromcaeroface,

If "any" aka infinite is required to prove, should six be sufficient to disprove?

A vehicle being optimized with tapered sides (top view) being compared to a roofline template...
Forum: Aerodynamics 12-03-2020, 07:48 AM
Replies: 272
Views: 19,898
Posted By aardvarcus
Aeromcaeroface, If you go back to the first...

Aeromcaeroface,

If you go back to the first post, the entire thread is actually about disproving the AST-I diagram.

To this end, a video was posted in which the AST-I diagram did not align...
Forum: Aerodynamics 12-03-2020, 05:22 AM
Replies: 272
Views: 19,898
Posted By aardvarcus
Even funnier is that of the six cars being used...

Even funnier is that of the six cars being used to disprove the "template", five fit the AST-II diagram perfectly and the other one is streamlined from top view, begging the question why you thought...
Forum: Aerodynamics 12-02-2020, 08:22 AM
Replies: 272
Views: 19,898
Posted By aardvarcus
Aeromcaeroface, I honestly have no idea why...

Aeromcaeroface,

I honestly have no idea why that diagram is posted there. I don't have any control over the site. All the diagrams that I have for my use from this site I pulled from threads...
Forum: Aerodynamics 12-01-2020, 09:38 PM
Replies: 272
Views: 19,898
Posted By aardvarcus
Julian, I truly have not noticed the...

Julian,

I truly have not noticed the prevalent use of that template here.

In a hemisphere, the top profile matches the side profile, somewhat by definition. Creating that would obviously be...
Forum: Aerodynamics 12-01-2020, 07:58 PM
Replies: 272
Views: 19,898
Posted By aardvarcus
Julian, Did I comment on your diagram use...

Julian,

Did I comment on your diagram use incorrectly? You are using the AST-I for all your overlays, are you not? In your videos and posts and such?

I really don't see that many users using...
Forum: Aerodynamics 12-01-2020, 06:47 PM
Replies: 272
Views: 19,898
Posted By aardvarcus
Yes there are different "templates" (diagrams)...

Yes there are different "templates" (diagrams) from different sources. Side views, top views, front views.

I can not tell you that the AST-II is the one for you to use, or whether you should be...
Forum: Aerodynamics 11-30-2020, 07:16 PM
Replies: 272
Views: 19,898
Posted By aardvarcus
Try fitting the AST-II.

Try fitting the AST-II.
Forum: Aerodynamics 11-14-2020, 12:46 AM
Replies: 272
Views: 19,898
Posted By aardvarcus
I see you are ignoring the part of my post about...

I see you are ignoring the part of my post about not using the AST-II template, which fits several of your example cars in your video per my overlay.

Apologies I did not precisely define all terms...
Forum: Aerodynamics 11-13-2020, 09:42 PM
Replies: 272
Views: 19,898
Posted By aardvarcus
Am I the only one to notice that you aren't even...

Am I the only one to notice that you aren't even using the current version of "the template" and that some of the pictures of cars in your video fit the AST-II?


Do you really believe what you...
Forum: Aerodynamics 11-04-2020, 08:50 AM
Replies: 111
Views: 15,709
Posted By aardvarcus
I have explained repeatedly i have a from the...

I have explained repeatedly i have a from the factory diesel Suburban running the factory optional stick shift transmission. Your link is to a factory gasser with an automatic transmission. My...
Forum: EcoModding Central 11-02-2020, 07:43 PM
Replies: 44
Views: 5,999
Posted By aardvarcus
Based on that, for a turnkey deal a 2021 Sienna...

Based on that, for a turnkey deal a 2021 Sienna Hybrid (claims 36mpg) is the only thing that comes to my mind right off, but for the cost I would suggest modifying your existing van a bit and use it.
Forum: Aerodynamics 11-01-2020, 09:17 PM
Replies: 111
Views: 15,709
Posted By aardvarcus
Matt, I do not know how he is calculating...

Matt,

I do not know how he is calculating his figures.

In overdrive at 70MPH per my BSFC Chart I should expect 0.405 lb/bhp-hr at WOT. Using that as an approximation for other throttle...
Forum: Aerodynamics 11-01-2020, 08:43 PM
Replies: 111
Views: 15,709
Posted By aardvarcus
So is your accusation that I am lying simply...

So is your accusation that I am lying simply because my 1994 Suburban gets better fuel economy than your 2008 Tahoe does? I can see how that would be frustrating for you.

Since you like looking up...
Forum: Aerodynamics 10-31-2020, 08:56 PM
Replies: 111
Views: 15,709
Posted By aardvarcus
Tahoe Hybrid, I agree to disagree on the...

Tahoe Hybrid,

I agree to disagree on the drag coefficient. All I know is the GM published figure for the gmt400 platform. You think it is higher, aerohead thinks it is lower.

I don't know about...
Forum: Aerodynamics 10-26-2020, 10:29 PM
Replies: 39
Views: 3,511
Posted By aardvarcus
I would vote lower cD. Careful driving to...

I would vote lower cD. Careful driving to minimize brake use can minimalize weight penalty. Inertia isn't the enemy until you convert it to heat.

I would also assume in real life that weight...
Forum: Aerodynamics 10-24-2020, 10:29 PM
Replies: 111
Views: 15,709
Posted By aardvarcus
It certainly did! Since it had been a few months...

It certainly did! Since it had been a few months I kept walking back over to the first side to remind myself of how I dealt with some of the binding and clearancing issues and to copy measurements....
Forum: Aerodynamics 10-24-2020, 10:08 PM
Replies: 111
Views: 15,709
Posted By aardvarcus
It's been a few months, a few small odds and ends...

It's been a few months, a few small odds and ends have gotten done since I last posted on reinforcing and welding up the drivers side. Many other things have taken precedence over the suburban...
Forum: Aerodynamics 10-18-2020, 08:14 AM
Replies: 63
Views: 6,000
Posted By aardvarcus
Fat Charlie, Excellent points. I agree "the...

Fat Charlie,
Excellent points. I agree "the template" a great starting point. Not an end all be all for every shape every time. If someone actually built the full 3d hemisphere vehicle I surmise it...
Forum: Aerodynamics 10-17-2020, 07:42 PM
Replies: 63
Views: 6,000
Posted By aardvarcus
Say what you want negatively about the template,...

Say what you want negatively about the template, but there have been many modifications built to follow it that have worked. I have done three myself, and got within 1% of the gains I had estimated....
Forum: Aerodynamics 08-17-2020, 08:18 AM
Replies: 43
Views: 5,752
Posted By aardvarcus
Honestly only losing 10% and being at 37mpg with...

Honestly only losing 10% and being at 37mpg with a loaded trailer is extremely good already. I would personally refrain from adding height to the front just to allow slope (unless you need that wedge...
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