01-26-2023, 12:47 PM
|
#141 (permalink)
|
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,715
Thanks: 8,150
Thanked 8,933 Times in 7,375 Posts
|
Center top: Vortex Strakes
Downforce burns fuel. Lift also burns fuel.
__________________
.
.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.
|
|
|
|
|
The Following User Says Thank You to freebeard For This Useful Post:
|
|
 Today
|
|
|
|
Other popular topics in this forum...
|
|
|
|
|
01-26-2023, 05:58 PM
|
#142 (permalink)
|
|
EcoModding DIY aer.or
Join Date: Oct 2020
Location: Virginia City, NV
Posts: 82
Thanks: 92
Thanked 69 Times in 57 Posts
|
Actually the Tropfewagen's "fenders" are closer to what I had in mind.
https://ecomodder.com/forum/member-f...ture4984-a.jpg |
|
|
|
|
The Following User Says Thank You to sregord For This Useful Post:
|
|
|
01-26-2023, 07:53 PM
|
#143 (permalink)
|
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,715
Thanks: 8,150
Thanked 8,933 Times in 7,375 Posts
|
Variable pitch, disabled by the brakes?
__________________
.
.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.
|
|
|
|
|
01-26-2023, 08:15 PM
|
#144 (permalink)
|
|
EcoModding DIY aer.or
Join Date: Oct 2020
Location: Virginia City, NV
Posts: 82
Thanks: 92
Thanked 69 Times in 57 Posts
|
Quote:
Originally Posted by freebeard
Variable pitch, disabled by the brakes?
|
adjustable(angle of attack).
I hadn't thought of changes demanded by brakes or acceleration...
more watching the MPG /HP demand from an Ultragauge to see if a change in the angle of attack made a change.
If the aerodynamic drag of this "lifting surface(s)" is greater than the benefit to RR, ... Jim Hall (Chaparral Racecars) I am not.
More curious though  |
|
|
|
|
The Following User Says Thank You to sregord For This Useful Post:
|
|
|
02-02-2023, 05:16 PM
|
#145 (permalink)
|
|
EcoModding DIY aer.or
Join Date: Oct 2020
Location: Virginia City, NV
Posts: 82
Thanks: 92
Thanked 69 Times in 57 Posts
|
Quote:
Originally Posted by freebeard
Welcome to Ecomodder.
Time is either speeding up or stretching out —I don't remember the post at #10 at all.
I watched the video again and what stood out this time was the inflating mechanism standing proud of the sidewall. I proposed a design that has a rigid floor, but was to use a passive inflation system. Those scalloped openings are apparently overkill. More recently I considered retractable fiberglass rods.
 |
Freebeard,
This "retractable/inflatable" boattail, what do you envision the rigid floor be made of?
|
|
|
|
|
02-02-2023, 06:44 PM
|
#146 (permalink)
|
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,715
Thanks: 8,150
Thanked 8,933 Times in 7,375 Posts
|
Terse: Polymetal/Dibond.
Verbose: Whatever they make difussers from, depending on whether it's a flat plate or complex as they tend to be,
You'll notice the pivot point is raised, such that as the floorplate deploys it swings down and forward to mate up to a rigid difusser.
Ignore the scalloped edge. That's depricated. I lean more toward fiberglass rods for bows, rather than inflatable.
__________________
.
.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.
|
|
|
|
|
The Following User Says Thank You to freebeard For This Useful Post:
|
|
|
02-03-2023, 07:34 PM
|
#147 (permalink)
|
|
EcoModding DIY aer.or
Join Date: Oct 2020
Location: Virginia City, NV
Posts: 82
Thanks: 92
Thanked 69 Times in 57 Posts
|
Quote:
Originally Posted by freebeard
I lean more toward fiberglass rods for bows, rather than inflatable.
|
Fiberglass rods like for those "curved" in camping tents?...use like hoops on an articulated bus /conestoga wagon, straight sided & top with radius-ed corners....folds up accordion like.
Last edited by sregord; 02-03-2023 at 07:48 PM..
|
|
|
|
|
The Following User Says Thank You to sregord For This Useful Post:
|
|
|
03-25-2023, 05:11 PM
|
#148 (permalink)
|
|
EcoModding DIY aer.or
Join Date: Oct 2020
Location: Virginia City, NV
Posts: 82
Thanks: 92
Thanked 69 Times in 57 Posts
|
Something I’ve noticed on the commercial truck trailtail is a need of flexible cables to keep the folded panel in place(inward), not rods “pushing” the panel out.
Are the aerodynamic forces on a panel shaped like the “template”greater inward or outward? Or neutral?
Last edited by sregord; 03-25-2023 at 05:51 PM..
|
|
|
|
|
03-25-2023, 06:30 PM
|
#149 (permalink)
|
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,715
Thanks: 8,150
Thanked 8,933 Times in 7,375 Posts
|
The exterior of Thee Holy Template strives for neutrality.
A flat truncation is like a guppy mouth sucking on the wake.
Quote:
|
the folded panel in place(inward)
|
This is ambiguous (for me). Deployed versus non-deployed?
__________________
.
.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.
|
|
|
|
|
The Following User Says Thank You to freebeard For This Useful Post:
|
|
|
03-25-2023, 08:16 PM
|
#150 (permalink)
|
|
EcoModding DIY aer.or
Join Date: Oct 2020
Location: Virginia City, NV
Posts: 82
Thanks: 92
Thanked 69 Times in 57 Posts
|
Quote:
Originally Posted by freebeard
The exterior of Thee Holy Template strives for neutrality.
Deployed versus non-deployed?
|
Does a "hybrid", starting with orbywan's fixed 3-5 foot, that I may add to, make sense? Having found proximity sensors that will warn of near collisions WAY BACK THERE. I'm becoming braver with the design. As you remember I'm starting with 32 foot, with a wag of 9 foot from the rear wheels.
|
|
|
|
|
