Interesting high mileage car developed in the 80's - Page 2 - Fuelly Forums

Android Users - Coming Soon! - Migrating from aCar 4.8 to 5.0

Go Back   Fuelly Forums > Fuel Talk > Aerodynamics
Search Today's Posts Mark Forums Read Click Here to Login
Reply
 
Thread Tools Display Modes
 
Old 09-15-2007, 05:07 PM   #11
Registered Member
 
basjoos's Avatar
 
Join Date: Mar 2006
Posts: 392
Country: United States
Quote:
Originally Posted by cfg83 View Post
basjoos -

It reminds me of your car. A commercially made version of your boat-taill.

CarloSW2

That's not the most efficient design for a boattail since it has only vertical taper. The most efficient boattail for an aircraft has equal amounts of vertical and horizontal taper. The most efficient boattail design for a car would have more horizontal taper than vertical taper. This is because the presence of the ground surface limits the amount of vertical taper you can efficiently use on the bottom side since it limits the movement of air to fill in along the bottom side of the boattail. My boattail has equal amounts of vertical and horizontal taper and terminates in a 2 foot wide horizontal line since my car is wider than it is tall. I kept more vertical taper on the bottom side of my boattail than is optimum since I have a steep approach to my driveway and I didn't want to risk the boattail dragging the ground.

If you look at the boattail designs from the 20's and 30's (Rumpler Tropfenwagen, various boattail speedsters), they had predominently horizontal taper.
__________________

__________________
]
aerocivic.com
basjoos is offline   Reply With Quote
Old 09-15-2007, 06:38 PM   #12
Registered Member
 
GasSavers_TomO's Avatar
 
Join Date: Oct 2006
Posts: 1,108
Country: United States
Send a message via AIM to GasSavers_TomO Send a message via MSN to GasSavers_TomO Send a message via Yahoo to GasSavers_TomO
It's funny, I have a chance to get those exact same wheels for my car! pretty neat car, and not bad looking

Basjoos - I don't know if you watched the video but the lights are only exposed when they need to be on. Otherwise the center section rises up to fit flush on the front of the car.
__________________

__________________

Honda Civic VX Info/Links
Remember to use good Webiquette!
Quote:
Originally Posted by ezeedee View Post
controversy is an idea thought up by weak people who are too afraid to hear the truth.
GasSavers_TomO is offline   Reply With Quote
Old 09-15-2007, 09:00 PM   #13
Registered Member
 
Join Date: Dec 2006
Posts: 55
Country: United States
Quote:
Originally Posted by VetteOwner View Post
cool lookin car indeed! i wonder what a pontiac fierro would get mpg wise if you really tried..
The Fiero isn't a lightweight. A Spitfire would be a better starting point.

What kind of mileage would it get with a VW TDI engine?
GasSavers_Lincoln is offline   Reply With Quote
Old 09-16-2007, 12:59 AM   #14
Registered Member
 
Peakster's Avatar
 
Join Date: Sep 2006
Posts: 467
Country: United States
Quote:
Originally Posted by VetteOwner View Post
cool lookin car indeed! i wonder what a pontiac fierro would get mpg wise if you really tried..
The original body design of the Fiero has a Cd of 0.37, so it's not that very aerodynamic (even worse with the headlamps popped up: Cd of 0.41). The notchback rear window creates a fair amount of drag and the pointed front end rams a lot of air under the car. The 1985 GT model was redesigned with an aero front end and a rear spoiler which brought the Cd down to 0.35.

But just for your information, I've gotten 38 mpg in my old Fiero @ 55mph with the 2.5L engine, automatic.

This 100+mpg car looks absolutely sweet. Shockingly it's very similar to what I would invision an ultimate aero machine to be like.
Peakster is offline   Reply With Quote
Old 09-16-2007, 07:11 AM   #15
Registered Member
 
basjoos's Avatar
 
Join Date: Mar 2006
Posts: 392
Country: United States
Oh yes they do. Ask any pilot of an taildragger about the thrill of trying to set it down on a runway in a gusting 25mpg crosswind without ground looping. But to get back to cars, my boattail has increased my car's sensitivity to crosswinds only slightly.

TomO - I watched the video from work. I live too far in the boonies for DSL or wireless. Dial-up and video do not a good match make. I have never been a fan of pop-up headlights (too much drag and one more thing to break in older cars). I don't know why they didn't just have a clear cover over the headlights and dispense with the pop-up. One inaccuracy from that TV commentator. He was saying that this car can do 0-60mph in 5sec and also get 100+mpg. What he didn't say that you can't get both from the same car/ICE combination.
__________________

__________________
]
aerocivic.com
basjoos is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Suggestion SummitSonata Fuelly Web Support and Community News 2 09-29-2010 03:19 AM
VW Jetta fast riser coolbreeze General Fuel Topics 5 07-22-2009 12:25 AM
Incorrect Milage Calcuatlion PatM Fuelly Web Support and Community News 4 07-17-2009 08:21 PM
Motor Home tab Buffalobilly Fuelly Web Support and Community News 0 03-20-2009 10:13 AM
Recent Fuel-ups Graph Scale rcsheets Fuelly Web Support and Community News 5 09-08-2008 04:11 AM

Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 09:53 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.