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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 11-20-2019, 10:21 AM   #41 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 3,439
Thanks: 11
Thanked 2,216 Times in 1,556 Posts
Quote:
Originally Posted by aardvarcus View Post
I have a relatively huge "wing" I built for the rear end this spring, that is the one I referenced as a kamm shell that I need to do more work to because the leading edge transitions are not smooth enough.
Dang that's a nice piece of kit.

Do you have a thread on it somewhere?

__________________
George
Architect, Artist and Designer of Objects

1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 11-20-2019, 02:19 PM   #42 (permalink)
Master EcoModder
 
aardvarcus's Avatar
 
Join Date: Apr 2012
Location: Evensville, TN
Posts: 574

Deep Blue - '94 GMC Suburban K2500 SLE
90 day: 23.75 mpg (US)

Griffin (T4R) - '99 Toyota 4Runner SR5
90 day: 25.43 mpg (US)
Thanks: 195
Thanked 474 Times in 259 Posts
Kach22i,

Its all in this thread, look at posts 9 through 20. Post 16 shows the under construction work the best.

https://ecomodder.com/forum/showthre...tml#post598593

It is Fiberglass over extruded polystyrene, built very similar to how I built my Aeroshell on my 05 Tacoma several years back.

Unfortunately I have been riding without it for a while, the transitions between the cab and the kamm did not turn out well, and I have been struggling with basically how to get it to come to a sharp thin point. Fiberglass over foam doesn't like sharp points. Initial attempts to span fiberglass by itself didn't fare well either. I need to either fix it or just put it back on as is.
  Reply With Quote
The Following User Says Thank You to aardvarcus For This Useful Post:
aerohead (11-20-2019)
Old 11-20-2019, 04:36 PM   #43 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 14,328
Thanks: 3,542
Thanked 4,736 Times in 3,770 Posts
I was researching for this obscure little 4-post thread and found this:

Quote:
Adhesion & Cohesion - adhesives.org
[Search domain http://www.adhesives.org/adhesives-s...sion-cohesion] https://www.adhesives.org/adhesives-...esion-cohesion
Chemical bonds, however, only form for very few substrate/adhesive combinations, e.g. between silicone and glass, polyurethane and glass, and epoxy resin and aluminum. For some of these bonded joints it has been demonstrated that chemical bonds account for up to 50% of all the interactions.
So maybe a mechanical bond between the polystyrene and an aluminum edge and then a chemical bond between the aluminum and fiberglass?

It could be as easy as doubled-over aluminum tape edging.
__________________
.
God's blessing on this wonderful world!
_________________
  Reply With Quote
The Following User Says Thank You to freebeard For This Useful Post:
aardvarcus (11-21-2019)
Old 11-21-2019, 10:22 AM   #44 (permalink)
Master EcoModder
 
aardvarcus's Avatar
 
Join Date: Apr 2012
Location: Evensville, TN
Posts: 574

Deep Blue - '94 GMC Suburban K2500 SLE
90 day: 23.75 mpg (US)

Griffin (T4R) - '99 Toyota 4Runner SR5
90 day: 25.43 mpg (US)
Thanks: 195
Thanked 474 Times in 259 Posts
Freebeard,

Using the aluminum tape is a great idea! I had been contemplating riveting some metal to the shell and fiberglassing over it, but the tape would work even better.

Really it should be ok even if the tape only was acting like a form, as once the fiberglass set up it should be rigid. I will try to give that a go this weekend.
  Reply With Quote
The Following User Says Thank You to aardvarcus For This Useful Post:
freebeard (11-21-2019)
Old 11-21-2019, 01:08 PM   #45 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 14,328
Thanks: 3,542
Thanked 4,736 Times in 3,770 Posts
I was thinking rivets too, unlit after I'd already hit Post Quick Reply.

So it was a passing thought, I hope it works out.

__________________
.
God's blessing on this wonderful world!
_________________
  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com