02-24-2019, 02:06 AM
|
#211 (permalink)
|
It's all about Diesel
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 8,816
Thanks: 0
Thanked 988 Times in 871 Posts
|
The shape of the rear fenders of this Argentinian Falcon caught my attention. Not sure how it could improve aerodynamics.

|
|
|
Today
|
|
|
Other popular topics in this forum...
|
|
|
02-24-2019, 02:12 AM
|
#212 (permalink)
|
EcoModding Apprentice
Join Date: May 2008
Location: N. Saskatchewan, CA
Posts: 1,647
Thanks: 82
Thanked 372 Times in 260 Posts
|
Those are nacelles for jet exhausts, plugged with tail lights. See the Ford show cars and Galaxie for the originals.
__________________
There is no excuse for a land vehicle to weigh more than its average payload.
|
|
|
02-26-2019, 12:10 AM
|
#213 (permalink)
|
Primer is still paint!
Join Date: Aug 2015
Location: box by the river
Posts: 525
Thanks: 81
Thanked 109 Times in 84 Posts
|
I like it!

|
|
|
02-26-2019, 10:57 AM
|
#215 (permalink)
|
Somewhat crazed
Join Date: Sep 2013
Location: 1826 miles WSW of Normal
Posts: 1,574
Thanks: 153
Thanked 431 Times in 367 Posts
|
Looks more like a partial roll cage gone Hollywood
I'm not old enough, but did those 50's tailfins do anything in a bad crosswind?
|
|
|
02-26-2019, 02:35 PM
|
#216 (permalink)
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 18,380
Thanks: 5,047
Thanked 6,077 Times in 4,866 Posts
|
The result was variable, Chrysler corp (after 1956) had the most effective ones. 1946 Cadillac and 1959 Chevrolet not so much.
much goodness: Just A Car Guy: aerodynamics
The 2nd entry, from Oct 2018, has an Ecomodder video.
__________________
.
The difference between science and screwin' around, is writing it down.
Adam Savage _________________
|
|
|
02-26-2019, 06:00 PM
|
#217 (permalink)
|
(:
Join Date: Jan 2008
Location: up north
Posts: 12,744
Thanks: 1,579
Thanked 3,520 Times in 2,203 Posts
|
Quote:
Originally Posted by Piotrsko
I'm not old enough, but did those 50's tailfins do anything in a bad crosswind?
|
I'd predict no noticeable difference on my '59 if the fins were lopped off.
Speaking of which, I've always been confused about the mechanism for the BAT cars' aero success regarding their fins. I can't figure how they work to lower drag and actually it seems to me that since vehicles are operating in crosswind conditions almost always, those huge fins would add sail area and leave trailing wakes. So like the '59, I wonder how they'd test sans fins.
Speaking of testing, perhaps the published Cd figures are erroneous? Bad figures have been put out there more than once...
|
|
|
02-26-2019, 08:09 PM
|
#218 (permalink)
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 18,380
Thanks: 5,047
Thanked 6,077 Times in 4,866 Posts
|
Isn't that a Chevrolet? The slabsided Mopars and Cadillacs OTOH:
https://heacockclassic.com/wp-content/uploads/8-1-1.jpg
I compare the early BATs to the Sunbird/Road Runner with the towel rack wing. That's a high-aspect airfoil with a lift-reducing wing. The BATs had no trunk lid clearance problems and less downforce. Luigi Colani would roll those fins in just because he could, and I think the slot midspan has some effect in crosswinds. Any vortexes shed are held closely into the wake.
__________________
.
The difference between science and screwin' around, is writing it down.
Adam Savage _________________
|
|
|
02-27-2019, 12:39 AM
|
#219 (permalink)
|
EcoModding Apprentice
Join Date: May 2008
Location: N. Saskatchewan, CA
Posts: 1,647
Thanks: 82
Thanked 372 Times in 260 Posts
|
Quote:
Originally Posted by Frank Lee
I'd predict no noticeable difference on my '59 if the fins were lopped off.
Speaking of which, I've always been confused about the mechanism for the BAT cars' aero success regarding their fins. I can't figure how they work to lower drag and actually it seems to me that since vehicles are operating in crosswind conditions almost always, those huge fins would add sail area and leave trailing wakes. So like the '59, I wonder how they'd test sans fins.
Speaking of testing, perhaps the published Cd figures are erroneous? Bad figures have been put out there more than once...
|
AFAIR, the primary purpose of the BAT fins was to manage surface area vs distance from the front. That turned out to be a dead end.
__________________
There is no excuse for a land vehicle to weigh more than its average payload.
|
|
|
02-27-2019, 01:47 AM
|
#220 (permalink)
|
(:
Join Date: Jan 2008
Location: up north
Posts: 12,744
Thanks: 1,579
Thanked 3,520 Times in 2,203 Posts
|
To move the center of pressure back?
Forgot to post earlier that I was also wondering- if they were on to something- why there were no successors.
|
|
|
|