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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 08-16-2014, 01:37 PM   #1 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 10,856
Thanks: 17,144
Thanked 5,810 Times in 3,502 Posts
Receiver-hitch boat tail

Here is a rendering from back in 2004.
The Stowaway II offered the elongation which would allow boat-tailing,and there would be the utility of additional cargo space without resorting to a roof rack system.
Earlier European designs had retractable wheels which would allow the tail to be slipped out of the receiver and rolled away without any lifting involved.
I'd gone through an advanced composites course at ABARIS and knew that a composite structure could be extremely light,since this is an all-compound surface and benefits from 'egging'.
A thermo-formed plastic structure would also be doable.
All light-metal,likewise.
A passenger side window would be beneficial when backing,as the 'C-pillar' would be enormous.
Or a camera system as is common now.
I won't be going for a patent,so feel free to use it if it can help.


The Koenig/Kamm K-form was predicated on a 50% frontal area wake.So this would be the recommendation for a 'practical' length.

__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/

Last edited by aerohead; 08-16-2014 at 01:43 PM.. Reason: add K-form
  Reply With Quote
The Following 4 Users Say Thank You to aerohead For This Useful Post:
CargoBoatTails (08-16-2014), chillsworld (08-16-2014), COcyclist (08-19-2014), Weather Spotter (08-16-2014)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 08-16-2014, 01:46 PM   #2 (permalink)
Wiki Mod
 
Weather Spotter's Avatar
 
Join Date: Nov 2009
Location: Midland MI, USA
Posts: 2,042

Max - '14 Ford C-Max SEL
Thanks: 228
Thanked 304 Times in 210 Posts
that is very similar to how my tail worked:

it all was built on this:



with top attachment to keep it tight to the car:



all the weight on the receiver worked very well. after 3.5 years it was going strong.
__________________
  Reply With Quote
The Following User Says Thank You to Weather Spotter For This Useful Post:
aerohead (08-16-2014)
Old 08-16-2014, 02:12 PM   #3 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 10,856
Thanks: 17,144
Thanked 5,810 Times in 3,502 Posts
3.5-yrs

Quote:
Originally Posted by Weather Spotter View Post
that is very similar to how my tail worked:

it all was built on this:



with top attachment to keep it tight to the car:



all the weight on the receiver worked very well. after 3.5 years it was going strong.
It's a great way to go.And for urban warfare they're easily removed for parking ease.
We'll lament the loss of your boat tail,but relish in the knowledge that we had 3.5 years of it.Thanks mucho!
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
The Following User Says Thank You to aerohead For This Useful Post:
CargoBoatTails (08-16-2014)
Old 08-16-2014, 03:08 PM   #4 (permalink)
I got ideas
 
Join Date: Aug 2014
Location: Georgia, United States
Posts: 115

Beast - '97 Mercury Mountaineer
Thanks: 29
Thanked 23 Times in 15 Posts
THANK YOU for posting this

In regards to shape/size/length... How would one determine this for their particular vehicle? I see mention that it would be based off of 50% frontal area wake... Can a fella get a translation for this? I know you guys are wicked smart with this stuff, but I'm not so much

Also, I see you based it off the bottom lines of the hitch for your underside... Did you intend for there to be a rear diffuser to meet with this design? it seems that dropping below the rear bumper would create more drag/poor air flow?

I had planned on basing my design off of the aero backs on the big rigs trailers, rather than an actual boat tail. It seems that yours follows this train of thought as well?

Any feedback you or ANYBODY else can give me would be awesome! I fully intend to build something for my Mountaineer. Spare tire, recovery gear, emergency gear, all tucked away inside it.

~C
  Reply With Quote
Old 08-16-2014, 05:15 PM   #5 (permalink)
Wiki Mod
 
Weather Spotter's Avatar
 
Join Date: Nov 2009
Location: Midland MI, USA
Posts: 2,042

Max - '14 Ford C-Max SEL
Thanks: 228
Thanked 304 Times in 210 Posts
Look at my build thread (search for matrix full boat tail).

People helped me figure out design and it should help you too.
__________________
  Reply With Quote
Old 08-16-2014, 07:43 PM   #6 (permalink)
Master EcoModder
 
Join Date: Aug 2013
Location: Richmond, VA
Posts: 447

Valerie - '03 Honda Civic DX
Team Honda
90 day: 55.79 mpg (US)
Thanks: 277
Thanked 231 Times in 105 Posts
It just occurred to me that I've been focusing entirely on my car for ecomodding. THIS however, would be perfect for my wife's SUV! Ideas are starting to flow...
__________________

  Reply With Quote
Old 08-17-2014, 10:31 PM   #7 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 15,251
Thanks: 3,858
Thanked 5,082 Times in 4,047 Posts

==> Lake Oswego, OR

Did this ever progress beyond a rendering? Did you intend for it to expand and collapse, or is it more of a 'bodykit' for the commercial item?

Quote:
Originally Posted by chillsworld
Any feedback you or ANYBODY else can give me would be awesome! I fully intend to build something for my Mountaineer.
Split tailgate.

Each side could swing open into a storage locker, with depth equal to half the tailgate width and a width equal to the length of the boattail.
  Reply With Quote
Old 08-18-2014, 01:33 PM   #8 (permalink)
Tinkerer
 
kafer65's Avatar
 
Join Date: Apr 2008
Location: Tennessee
Posts: 282

Silver - '15 Mazda CX-5 Sport
Team Mazda
90 day: 37.23 mpg (US)
Thanks: 7
Thanked 60 Times in 52 Posts
I've been meaning to ask how WeatherSpotter got the plasic wing off of the top of the hatch. I dream of doing this to my SUV. Problem is I got a hitch mount bicycle carrier but not a hitch yet. I can't use the old bike carrier because its made to hang off of the top of the hatch.
__________________


Mirror deletes, 80% grill blocks, wheel covers, 50 psi tires = 6% better MPG avg. over a year. Wheel skirts overcoming ethanol winter fuel mpg losses and more!
http://ecomodder.com/forum/showthrea...ead-30641.html
  Reply With Quote
Old 08-18-2014, 03:28 PM   #9 (permalink)
Wiki Mod
 
Weather Spotter's Avatar
 
Join Date: Nov 2009
Location: Midland MI, USA
Posts: 2,042

Max - '14 Ford C-Max SEL
Thanks: 228
Thanked 304 Times in 210 Posts
Quote:
Originally Posted by kafer65 View Post
I've been meaning to ask how WeatherSpotter got the plasic wing off of the top of the hatch. I dream of doing this to my SUV. Problem is I got a hitch mount bicycle carrier but not a hitch yet. I can't use the old bike carrier because its made to hang off of the top of the hatch.
Mine came off with 4 bolts, those are the holes I used to hang the tail off of.
__________________
  Reply With Quote
Old 08-18-2014, 06:04 PM   #10 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 10,856
Thanks: 17,144
Thanked 5,810 Times in 3,502 Posts
design

Quote:
Originally Posted by chillsworld View Post
THANK YOU for posting this

In regards to shape/size/length... How would one determine this for their particular vehicle? I see mention that it would be based off of 50% frontal area wake... Can a fella get a translation for this? I know you guys are wicked smart with this stuff, but I'm not so much

Also, I see you based it off the bottom lines of the hitch for your underside... Did you intend for there to be a rear diffuser to meet with this design? it seems that dropping below the rear bumper would create more drag/poor air flow?

I had planned on basing my design off of the aero backs on the big rigs trailers, rather than an actual boat tail. It seems that yours follows this train of thought as well?

Any feedback you or ANYBODY else can give me would be awesome! I fully intend to build something for my Mountaineer. Spare tire, recovery gear, emergency gear, all tucked away inside it.

~C
Here's what you're up against



You want the tail to fill in the region occupied by the smoke (1st image),of the blue area in the other two.
You could use the 'Template' or Mair's boat tail

You can do better than a 'Trailer Tail.'

__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/

Last edited by aerohead; 08-18-2014 at 06:06 PM.. Reason: add data
  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com