07-08-2024, 07:46 PM
|
#31 (permalink)
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,541
Thanks: 8,084
Thanked 8,877 Times in 7,326 Posts
|
Quote:
At what point does the Bowlus Road Chief trailer lose flow attachment?
|
The separation line will vary by cross-wind conditions. But it's a good point, curve those side panels.
Quote:
Is speed a factor in max angle?
|
The general range is 25-250MPH, again depending on conditions.
Quote:
Originally Posted by JSH
I am surprised that an almost $265K trailer has a cheap looking plywood interior like a budget van build.
|
The original Bowlus had countertops made from the same aluminum sheet as the shell.
__________________
.
.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
____________________
.
.Three conspiracy theorists walk into a bar --You can't say that is a coincidence.
|
|
|
Today
|
|
|
Other popular topics in this forum...
|
|
|
07-08-2024, 08:40 PM
|
#32 (permalink)
|
EcoModding Lurker
Join Date: Nov 2023
Location: MN
Posts: 93
Thanks: 35
Thanked 99 Times in 63 Posts
|
WT with hard left gust
I wonder if the twin-wall polycarbonate's ability to flex enhances flow attachment.
|
|
|
07-08-2024, 10:35 PM
|
#33 (permalink)
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,541
Thanks: 8,084
Thanked 8,877 Times in 7,326 Posts
|
Your vehicle's wake is a degenerate form of a Vortex Street.
en.wikipedia.org/wiki/K%C3%A1rm%C3%A1n_vortex_street
Quote:
Animation of vortex street created by a cylindrical object; the flow on opposite sides of the object is given different colors, showing that the vortices are shed from alternating sides of the object
|
I would have concerns about buffeting. aerohead would have the most experience with rigid vs flexible structures.
__________________
.
.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
____________________
.
.Three conspiracy theorists walk into a bar --You can't say that is a coincidence.
|
|
|
07-09-2024, 07:31 AM
|
#34 (permalink)
|
aero guerrilla
Join Date: Oct 2008
Location: Warsaw, Poland
Posts: 3,747
Thanks: 1,327
Thanked 749 Times in 476 Posts
|
Quote:
Originally Posted by JohnForde
At what point does the Bowlus Road Chief trailer lose flow attachment?
Is speed a factor in max angle? I always drive 63 mph.
|
Would you be willing to tuft test it?
__________________
e·co·mod·ding: the art of turning vehicles into what they should be
What matters is where you're going, not how fast.
"... we humans tend to screw up everything that's good enough as it is...or everything that we're attracted to, we love to go and defile it." - Chris Cornell
[Old] Piwoslaw's Peugeot 307sw modding thread
|
|
|
07-09-2024, 09:36 AM
|
#35 (permalink)
|
EcoModding Lurker
Join Date: Nov 2023
Location: MN
Posts: 93
Thanks: 35
Thanked 99 Times in 63 Posts
|
Bowlus
Quote:
Originally Posted by Piwoslaw
Would you be willing to tuft test it?
|
I own the Zevo. The Bowlus is just a photo.
|
|
|
The Following User Says Thank You to JohnForde For This Useful Post:
|
|
07-09-2024, 12:14 PM
|
#36 (permalink)
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,541
Thanks: 8,084
Thanked 8,877 Times in 7,326 Posts
|
Apples and oranges. A cube and a tic-tac shape have different aerodynamic characteristics.
A box van is a disaster at the front, with an opportunity for flow reattachment that increases with length, followed by a disaster at the rear.
The Bowlus (neglecting the tow vehicle) has a rounded front and a tapered rear with a variable straight center section. If half the taper at the rear were truncated, the Cd would be maybe 10% higher. Less affected by crosswinds.
__________________
.
.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
____________________
.
.Three conspiracy theorists walk into a bar --You can't say that is a coincidence.
|
|
|
07-09-2024, 07:29 PM
|
#37 (permalink)
|
EcoModding Lurker
Join Date: Nov 2023
Location: MN
Posts: 93
Thanks: 35
Thanked 99 Times in 63 Posts
|
plywood & coroplast drawing offering 17, 18.5 & 20 deg
Thinking of cutting the plywood top to initially accommodate all 3
Top will Get a coroplast extension to 48" too
|
|
|
07-09-2024, 08:39 PM
|
#38 (permalink)
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,541
Thanks: 8,084
Thanked 8,877 Times in 7,326 Posts
|
This was my suggestion for wire-reinforcing Coroplast (dated 2013!)
From the top, a raw edge, a recessed wire ready for a tape overlay, and a sunken wire that could have the two sides lapped over it and glued or taped. Of course wire can run the length of the flutes for reinforcing in the other direction.
__________________
.
.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
____________________
.
.Three conspiracy theorists walk into a bar --You can't say that is a coincidence.
|
|
|
07-10-2024, 11:01 AM
|
#39 (permalink)
|
Somewhat crazed
Join Date: Sep 2013
Location: 1826 miles WSW of Normal
Posts: 4,369
Thanks: 528
Thanked 1,193 Times in 1,053 Posts
|
Foam injection works really well, also. Changes the failure point from collapsing the skin between the ribs to the skins which leads to hitting the yield on the outer skin much later in the load process.
__________________
casual notes from the underground:There are some "experts" out there that in reality don't have a clue as to what they are doing.
|
|
|
07-10-2024, 07:58 PM
|
#40 (permalink)
|
EcoModding Lurker
Join Date: Nov 2023
Location: MN
Posts: 93
Thanks: 35
Thanked 99 Times in 63 Posts
|
4 pics of the Zevo's 'cuff' and gap
4 pics of the Zevo's 'cuff' and gap
|
|
|
The Following User Says Thank You to JohnForde For This Useful Post:
|
|
|