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Old 07-12-2020, 02:36 PM   #91 (permalink)
Aero Wannabe
 
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ACEL, Thank you for taking the time to do your testing and post your results. Congratulations on coming up with a good looking wheel cover design. It looks like they could be factory.

As always, when we see wheel covers on this site we would love to see how you have attached them securely and avoid damaging the alloy wheels underneath. Also, from your post I assume that the finished wheel covers were tested on a different day. If you find the time, it would be interesting to see A-B-A testing on the same day and if you see your tank mpg averages going forward.

Thanks again for your efforts.

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Originally Posted by freebeard View Post
The power needed to push an object through a fluid increases as the cube of the velocity. Mechanical friction increases as the square, so increasing speed requires progressively more power.
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Old 07-13-2020, 09:55 PM   #92 (permalink)
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Wheel cover inspiration for 1999 Acura EL

Some ecomodders may inquire about the choice of the wheel cover mock-ups that were trialed. After reading a number of scientific articles, I decided to test the "open center - thick perimeter" wheel studied by Vdovin in 2013 and the "open perimeter" reported by Julian Edgar in his book and some ecomodder that fabricated some for his Tesla.

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Vdovin, Alexei, in 2013 also commented on the results experienced in a wind tunnel with these types of wheels :

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It is not fun to read an engineering thesis but Tesla came to the same results that were well summarized by Vdovin. He was supported in his research and working with engineers and aerodynamicists of Volvo. The people of this company sometimes come up with great ideas and innovations.

Cheers ecomodders!

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See many mods in detail with results on my modification thread for my 1999 Acura EL, similar to US Civic EX

Facts, please, give me the facts! Theoretical knowledge is verified by empirical knowledge! Check Einstein's General Relativity Theory E=MC^2! Every few years some new astrophysics observation and data prove some of Einstein's theory predictions more than a century old.
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