01-24-2019, 09:55 AM
|
#141 (permalink)
|
Master EcoModder
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 4,158
Thanks: 120
Thanked 2,790 Times in 1,959 Posts
|
Quote:
Originally Posted by freebeard
Maybe raising and lowering the ball shows speed difference in the center vs up against the wall.
|
I think the red ball/sphere is a test object with known Cd for calibration purposes- but could be wrong.
It is so simple looking that I want it to work, but also odd that it does not match other scale model wind tunnels I have seen.
|
|
|
Today
|
|
|
Other popular topics in this forum...
|
|
|
01-24-2019, 10:21 AM
|
#142 (permalink)
|
EcoModding Apprentice
Join Date: May 2008
Location: N. Saskatchewan, CA
Posts: 1,805
Thanks: 91
Thanked 459 Times in 327 Posts
|
Quote:
Originally Posted by kach22i
I think the red ball/sphere is a test object with known Cd for calibration purposes- but could be wrong.
It is so simple looking that I want it to work, but also odd that it does not match other scale model wind tunnels I have seen.
|
It might be able to distinguish between smooth and dimpled balls. In test equipment, you get what you pay for. This will work for various classroom demonstrations with a smoke trail, but not have the precision for experimentation.
|
|
|
01-24-2019, 10:45 AM
|
#143 (permalink)
|
Master EcoModder
Join Date: Jun 2009
Location: SC Lowcountry
Posts: 1,795
Thanks: 226
Thanked 1,353 Times in 711 Posts
|
|
|
|
The Following User Says Thank You to redneck For This Useful Post:
|
|
01-24-2019, 04:04 PM
|
#144 (permalink)
|
It's all about Diesel
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 12,571
Thanks: 0
Thanked 1,627 Times in 1,452 Posts
|
|
|
|
01-24-2019, 05:07 PM
|
#145 (permalink)
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 27,703
Thanks: 7,777
Thanked 8,586 Times in 7,070 Posts
|
Watch your head if you're standing at the curb when that pulls up.
__________________
.
.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
____________________
.
."We're deeply sorry." -- Pfizer
|
|
|
01-25-2019, 04:45 AM
|
#146 (permalink)
|
It's all about Diesel
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 12,571
Thanks: 0
Thanked 1,627 Times in 1,452 Posts
|
Quote:
Originally Posted by freebeard
Watch your head if you're standing at the curb when that pulls up.
|
Because of the mirrors or the front overhang?
|
|
|
01-25-2019, 11:30 AM
|
#147 (permalink)
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 27,703
Thanks: 7,777
Thanked 8,586 Times in 7,070 Posts
|
The mirror is outside the width of the buses body and they pull right up to the curb.
__________________
.
.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
____________________
.
."We're deeply sorry." -- Pfizer
|
|
|
01-26-2019, 01:31 PM
|
#149 (permalink)
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 27,703
Thanks: 7,777
Thanked 8,586 Times in 7,070 Posts
|
It looks like the highway post offices that ran between 1948 and 1974.
__________________
.
.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
____________________
.
."We're deeply sorry." -- Pfizer
|
|
|
01-29-2019, 12:49 AM
|
#150 (permalink)
|
It's all about Diesel
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 12,571
Thanks: 0
Thanked 1,627 Times in 1,452 Posts
|
Rear wiper in a sedan might seem pointless and an aerodynamic disturbance, but it does seem somewhat helpful in some circumstances.
|
|
|
|