06-25-2021, 07:17 PM
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#601 (permalink)
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Master EcoModder
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blending
Quote:
Originally Posted by tomi_k
Something like this... but will need to check how contours of the truck goes and do some estimations of how much "curvature" could be....
Blending all surfaces nicely to the back of the bed (not increasing wake area) and keep transitions of surfaces following closely to the truck's overall shape is the target.... Once that is established, then tweaking surfaces here and there is much easier... taking baby steps while learning....
https://ecomodder.com/forum/member-t...-211524-02.jpg |
Yes, Morelli admonished:
* body shape must vary slowly
* body area must vary slowly
* body contour must vary slowly
* body must be as rounded as possible
* body pressure gradients must be as low as possible
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 Today
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Other popular topics in this forum...
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06-25-2021, 07:37 PM
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#602 (permalink)
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Banned
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Quote:
Originally Posted by aerohead
Yes, Morelli admonished:
* body shape must vary slowly
* body area must vary slowly
* body contour must vary slowly
* body must be as rounded as possible
* body pressure gradients must be as low as possible
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Unfortunately, some of these rules are deceptive or incorrect. Looking at any low drag current car quickly shows that.
For example, the 'body must be as rounded as possible' applies only in parts - at the rear of the car, we want clean separation and so rounded trailing edges will substantially increase drag. That's why low-drag cars have rear separation edges.
The same for 'body shape must vary slowly' - again, only in certain parts. As shown earlier, to reduce the strength of trailing vortex formation off rear slanted pillars, body shape often changes fast enough to have distinct edges.
It's not a good idea to apply rules of thumb to car modification. There are always exceptions, and as this list has shown, sometimes those exceptions are quite major. |
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07-04-2021, 03:35 PM
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#603 (permalink)
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EcoModding Lurker
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Leftover wood strips, glue gun and crafting cardboard to make shape templates...
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07-04-2021, 03:43 PM
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#604 (permalink)
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EcoModding Lurker
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Roof and sidewall profiles (front / rear view)...
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07-07-2021, 10:51 PM
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#605 (permalink)
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EcoModding Lurker
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Framing for basic plywood shape (under final outer shape)... Top braces will be replaced with curved beams and two other beams (between top and side wall) are not visible yet...
Last edited by tomi_k; 07-07-2021 at 11:00 PM..
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07-08-2021, 11:39 AM
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#606 (permalink)
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Cyborg ECU
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Quote:
Originally Posted by tomi_k
Framing for basic plywood shape (under final outer shape)... Top braces will be replaced with curved beams and two other beams (between top and side wall) are not visible yet...
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Looking good.
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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10-05-2021, 02:27 PM
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#607 (permalink)
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home of the odd vehicles
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https://www.mivehiclesolutions.com/aero-x-cap
Does anyone besides the above sell a commercial aero cap?
What ever happened to Bondo?
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10-06-2021, 11:52 AM
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#608 (permalink)
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Master EcoModder
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Bondo
Quote:
Originally Posted by rmay635703
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FoMoCo was impressed enough, that they paid for the wind tunnel testing. But Brett's 'good deed' was summarily punished in the marketplace.
At great personal expense, he gave us a 'CYBERTRUCK' and an offramp out of climate change, a decade before Tesla. Less than a handful of Americans, out of 320-million, recognized the achievement and were willing to invest in the 'capitalist' product. SEMA parachutes for trucks sold well though.
R.I.P. home economics. Arithmetic remains D.O.A. in America.
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10-23-2021, 04:59 PM
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#609 (permalink)
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EcoModding Lurker
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10-23-2021, 05:58 PM
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#610 (permalink)
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Master EcoModder
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If you use  rather than  , you get this:
Did you drive it and then lift it of without disturbing the yarn tufts?
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