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Forum: Aerodynamics 06-19-2018, 06:38 PM
Replies: 776
Views: 284,036
Posted By Tesla
Power Equation 2.2

I've been playing with the Power equation and have come up with a few interesting bits.
The original equation was simple y=ax^b which worked well for the purpose but was limited in adjustment, so I...
Forum: Aerodynamics 06-12-2018, 02:49 AM
Replies: 776
Views: 284,036
Posted By Tesla
As for modelability, irrespective of how complex...

As for modelability, irrespective of how complex you make it, we can define it mathematically as a static form, but I think the issues lie more in practicality, both in interior functionality as well...
Forum: Aerodynamics 06-11-2018, 10:04 PM
Replies: 776
Views: 284,036
Posted By Tesla
Perfection

I've been pondering on this for a while now and I think we are coming to the limits of this process, as I understand it we have experimental data and experience which suggests a teardrop type shape...
Forum: Aerodynamics 06-11-2018, 09:27 PM
Replies: 776
Views: 284,036
Posted By Tesla
Template power equation

When I was reviewing some of the equations I've posted I noticed some anomalies with the Angles Rate of change from segment to segment, this would be the acceleration of inclination. Even though the...
Forum: Aerodynamics 06-11-2018, 08:20 PM
Replies: 776
Views: 284,036
Posted By Tesla
So then I assume if we design the curve to 23...

So then I assume if we design the curve to 23 degrees to depart the body at the 80% mark that would be within the parameters and this would also mean that the overall principle would likely be less...
Forum: Aerodynamics 06-02-2018, 10:05 AM
Replies: 776
Views: 284,036
Posted By Tesla
Template polynomial equation overlay

When I started looking for an equation to match the template a few years ago, initially I just plotted the template angles in excel to try to match the curve, as I muddled about I found out that...
Forum: Aerodynamics 06-02-2018, 09:27 AM
Replies: 776
Views: 284,036
Posted By Tesla
Parametric Teardrop Curves Equation update

I have re-done the equation with the specs from post 517 (3-Wheeler) just to explore those specs further, although it does come up with a 2.5:1 Aspect ratio, there are other issues which make it less...
Forum: Aerodynamics 05-29-2018, 07:47 AM
Replies: 776
Views: 284,036
Posted By Tesla
Parametric Teardrop Curves Equation

With the Tuna maybe it's to allow for eating on the run, say when it opens mouth and flares gills, maybe God might sign in and explain if we're lucky.

*** Edit Note for post 711 at top of page,...
Forum: Aerodynamics 05-27-2018, 08:31 PM
Replies: 776
Views: 284,036
Posted By Tesla
Thanks for that, just took a copy and will have a...

Thanks for that, just took a copy and will have a play later,
I just mirrored the chart to get an image for the full rotation
...
Forum: Aerodynamics 05-26-2018, 07:18 AM
Replies: 776
Views: 284,036
Posted By Tesla
Template AS-II and Airfoil Equation overlay

Hey all,
Been away for a few years, but recently got inspired to dig out the old spreadsheets and have another play with the equations and after a lot of fiddling I finally managed to get the specs...
Forum: EcoModding Central 10-13-2013, 06:35 PM
Replies: 7
Views: 1,834
Posted By Tesla
Opposed piston 2 stroke diesel.

I was looking around at engine types and thought this one was interesting.
http://www.youtube.com/watch?v=JMAEin5iU4Y
One Crank Opposed Piston Engine...
Forum: EcoModding Central 10-13-2013, 06:29 PM
Replies: 10
Views: 2,410
Posted By Tesla
Alternator efficiency

Stumbled across this paper.
http://www.delcoremy.com/documents/high-efficiency-white-paper.aspx

Some intereting info, they indicate alternator efficiency is highest at 30-40% load and 2,000 -...
Forum: Aerodynamics 10-01-2013, 09:06 AM
Replies: 776
Views: 284,036
Posted By Tesla
Thanks for that, I still need to play with this...

Thanks for that, I still need to play with this equation a bit more.
I've been reading a variety of things from Semi-Truck aero through to Belbouth design for engine air intakes, but one thing that...
Forum: Aerodynamics 09-23-2013, 04:52 PM
Replies: 776
Views: 284,036
Posted By Tesla
Xist, thanks for overlay, the curve is definately...

Xist, thanks for overlay, the curve is definately more agressive then original template, I was thinking it is much closer to the new version below with the steeper angles at the start.
3 Wheeler, I...
Forum: Aerodynamics 09-23-2013, 06:47 AM
Replies: 776
Views: 284,036
Posted By Tesla
Thanks for posting that info, I made up my own...

Thanks for posting that info, I made up my own spreadsheet and charts at bottom:



I did the chart with mirror image to see how uniform shape is, I think it looks pretty good, be good if someone...
Forum: Aerodynamics 09-21-2013, 10:45 PM
Replies: 101
Views: 25,188
Posted By Tesla
Basically looking from the tail back to the...

Basically looking from the tail back to the widest section, kind of like the rib cage of the beast, cross sections down the length of the tail at 300mm intervals.
I put these together while I was...
Forum: EcoModding Central 09-13-2013, 09:14 PM
Replies: 1
Views: 1,002
Posted By Tesla
Diesel intake restriction reduces efficiency.

Just came across this study:
http://www.icrepq.com/ICREPQ'09/504-mamat.pdf
Forum: Aerodynamics 09-10-2013, 06:09 PM
Replies: 56
Views: 14,830
Posted By Tesla
Just found another article on the LFA: LFA...

Just found another article on the LFA:
LFA Technology Features: Aerodynamic Design | LFA | Models | Lexus International (http://www.lexus-int.com/models/LFA/tech-features-02.html)
Gives a bit more...
Forum: EcoModding Central 09-06-2013, 05:51 AM
Replies: 7
Views: 3,069
Posted By Tesla
Old thread dig, but just found article/study...

Old thread dig, but just found article/study related to topic for diesel air filtration:
http://www.fueleconomy.gov/feg/pdfs/2013-01-0311_Diesel_AirFilter.pdf

Doesn't agree with my experience,...
Forum: EcoModding Central 02-11-2013, 05:31 PM
Replies: 39
Views: 30,433
Posted By Tesla
Just went through the thread, didn't look at the...

Just went through the thread, didn't look at the article,
First point it was determined to be "Bogus" by a roomfull of mutually backslapping ecomodders, maybe the claim was dodgy, but I always...
Forum: EcoModding Central 02-11-2013, 12:33 AM
Replies: 17
Views: 2,144
Posted By Tesla
I assume you are talking about the OEM gauge, the...

I assume you are talking about the OEM gauge, the first thing you need to understand is that the OEM gauges are designed to stay in one place until the S#it is just about to hit the fan.

Back in...
Forum: Aerodynamics 02-06-2013, 07:04 PM
Replies: 2
Views: 1,359
Posted By Tesla
Cooling Fan aerodynamics.

Just stumbled on this,
Davies Craig radiator fans, scroll down to the bottom of the page they have a little discussion of curved vs straight blades, tripping the boundary layer and using winglets on...
Forum: Aerodynamics 02-05-2013, 03:09 AM
Replies: 2
Views: 1,266
Posted By Tesla
Dimples and drag, yet again.....

Just stumbled on this little article, can't see any particular application, but was interesting how thay were using it on rims for racing cycles and how the angular geometric dimples perform better...
Forum: Aerodynamics 02-04-2013, 06:06 AM
Replies: 3
Views: 1,170
Posted By Tesla
Aerodynamics at the particle level

Found this paper while digging for more aero details, very recent too:
http://arxiv.org/pdf/nlin/0507032.pdf

I was specifically looking for something that discusses the actual particle behaviour,...
Forum: Aerodynamics 02-02-2013, 05:47 PM
Replies: 14
Views: 3,771
Posted By Tesla
Yes, exactly that, I don't think this point is...

Yes, exactly that,
I don't think this point is highlighted often enough with the grille block mod.
If you reduce inlet hole (grill area), but you have gaping holes behind the grille that allow air...
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