Go Back   EcoModder Forum > EcoModding > Aerodynamics
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 01-17-2023, 02:05 AM   #1 (permalink)
Master EcoModder
 
Phase's Avatar
 
Join Date: Mar 2022
Location: oregon
Posts: 721

Black Bullet - '19 Hyundai Ioniq Hybrid Blue
Thanks: 0
Thanked 374 Times in 312 Posts
Boat tail easy

What would be the cheapest way to attach and make a test boat tail for my Ioniq? For speeds less than 70 mph. It would be nice to do some cheap ugly mock up tests before trying to build one that’s a better quality material and painted properly with a rear hitch attachment.

I just want to do some aba testing with something super cheap and less than 5 bucks total.


Also to anyone who’s made a boat tail, describe the difference you “ feel” in the car when driving with the boat tail attaches

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 01-17-2023, 02:42 AM   #2 (permalink)
Human Environmentalist
 
redpoint5's Avatar
 
Join Date: Aug 2010
Location: Oregon
Posts: 11,077

Acura TSX - '06 Acura TSX
90 day: 28.24 mpg (US)

Lafawnda - '01 Honda CBR600 F4i
90 day: 47.32 mpg (US)

Big Yeller - '98 Dodge Ram 2500 base
90 day: 21.82 mpg (US)

Prius Plug-in - '12 Toyota Prius Plug-in
90 day: 57.64 mpg (US)

Mazda CX-5 - '17 Mazda CX-5 Touring
90 day: 25.39 mpg (US)

Chevy ZR-2 - '03 Chevrolet S10 ZR2
90 day: 17.14 mpg (US)
Thanks: 3,776
Thanked 4,095 Times in 3,106 Posts
Less than five bucks? LOL, I thought I was a cheap *******

Coroplast political signs, including the lumbar supports to create the frame, and other various materials you happen to have laying around the house?
__________________
Gas and Electric Vehicle Cost of Ownership Calculator







Give me absolute safety, or give me death!
  Reply With Quote
Old 01-17-2023, 03:22 AM   #3 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 24,823
Thanks: 7,030
Thanked 7,910 Times in 6,472 Posts
Don't be a menace to others. If I cared to I could find threads about aero mods blown off and laying in a ditch.

So use bungie cords.

CAD will only approximate a properly faired and finished version.
__________________
.
.

Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster

____________________

Back in my day there was so much toilet paper and eggs that we would throw them at the houses of our enemies

____________________
  Reply With Quote
Old 01-17-2023, 12:33 PM   #4 (permalink)
Master EcoModder
 
Join Date: Sep 2012
Location: Motor City
Posts: 266
Thanks: 0
Thanked 206 Times in 128 Posts
Boat tail - Redneck style...
  Reply With Quote
The Following 3 Users Say Thank You to ennored For This Useful Post:
aerohead (01-23-2023), Cd (01-17-2023), Isaac Zachary (01-17-2023)
Old 01-17-2023, 04:58 PM   #5 (permalink)
Cd
Ultimate Fail
 
Cd's Avatar
 
Join Date: Feb 2008
Location: Austin,Texas
Posts: 3,450
Thanks: 2,781
Thanked 1,028 Times in 621 Posts
Five dollars ? You can't even buy a roll of tape for that much anymore.
My first thought is to mock it up in CAD and run CFD on it using freeware programs.
  Reply With Quote
Old 01-17-2023, 05:40 PM   #6 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 24,823
Thanks: 7,030
Thanked 7,910 Times in 6,472 Posts
I'm trying to be patient with Blender. The power is there, it just needs to be directed toward CFD.

An interesting development for the coming year is Blender apps. This will mean that the casual CFD user won't have to face the entire Blender interface. It can be tailored to the task at hand.

edit:
I just got back to that. At 13:43 in a discussion on Simulation Nodes he shows a vortex street. It sounds like hair simulations might produce streamlines.
__________________
.
.

Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster

____________________

Back in my day there was so much toilet paper and eggs that we would throw them at the houses of our enemies

____________________

Last edited by freebeard; 01-17-2023 at 06:14 PM..
  Reply With Quote
Old 01-17-2023, 07:58 PM   #7 (permalink)
Master EcoModder
 
Phase's Avatar
 
Join Date: Mar 2022
Location: oregon
Posts: 721

Black Bullet - '19 Hyundai Ioniq Hybrid Blue
Thanks: 0
Thanked 374 Times in 312 Posts
I was just thinking of duct taping some cardboard onto the car lol
  Reply With Quote
The Following User Says Thank You to Phase For This Useful Post:
Isaac Zachary (01-17-2023)
Old 01-17-2023, 10:36 PM   #8 (permalink)
High Altitude Hybrid
 
Join Date: Dec 2020
Location: Gunnison, CO
Posts: 1,477

Avalon - '13 Toyota Avalon HV
90 day: 40.45 mpg (US)

Prius - '06 Toyota Prius
Thanks: 823
Thanked 419 Times in 327 Posts
Quote:
Originally Posted by Phase View Post
I was just thinking of duct taping some cardboard onto the car lol
That might work. I'd say make something like this with sheets of cut cardboard and then try to wrap more cardboard around it. You might be able to find cardboard for free at a recycle center or behind a store or restaurant.

__________________
  Reply With Quote
The Following User Says Thank You to Isaac Zachary For This Useful Post:
aerohead (01-19-2023)
Old 01-19-2023, 12:05 PM   #9 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 15,140
Thanks: 23,295
Thanked 6,882 Times in 4,387 Posts
'duct tape'

Have you watched the 'THINK FLIGHT' YouTube of the aero-modded Subaru Impreza ?
He tested at 65-mph, with no 'events.'
I highly recommend some sub-structure, firmly attached to the car.
On the CRX, the cardboard mockup was fiberglassed to become the final boat tail.
---------------------------------------------------------------------------------------
On the car or truck, the ride becomes as with a limousine. Rock solid, and unflappable in crosswind, gusts, or bow-shocks off 18-wheelers.
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
Old 01-20-2023, 01:53 PM   #10 (permalink)
Master EcoModder
 
Phase's Avatar
 
Join Date: Mar 2022
Location: oregon
Posts: 721

Black Bullet - '19 Hyundai Ioniq Hybrid Blue
Thanks: 0
Thanked 374 Times in 312 Posts
What’s the impact difference between tapering just the roofline versus tapering the sides too as a full boat tail? I noticed all the eco modders taper all directions for their boat tails. Makes sense. But what about if I just extended the roofline and didn’t do too much to the sides? Think Mercedes EQXX or the light year zero. The sides of the rear only have a super small taper that isn’t very noticible, the main thing is their rooflines going down and extending

How much CD drop would I see just be extending down my roofline while only lengthening out the sides like those cars?

  Reply With Quote
The Following User Says Thank You to Phase For This Useful Post:
aerohead (01-23-2023)
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2023, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com