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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 12-31-2009, 01:54 PM   #11 (permalink)
Master EcoModder
 
Join Date: Jun 2008
Location: Earth
Posts: 5,209
Thanks: 225
Thanked 807 Times in 591 Posts
Quote:
Originally Posted by aerohead View Post
Neither the Corvette pictured,nor the racecar could navigate a driveway ramp without leaving their nose on the ground.
So you couldn't possibly add a couple of hinges, an actuator, and a range sensor to lift the thing out of the way? Or even have it retract if you're moving less than 35 mph or so?

(I've actually been thinking of something like this for my Toyota pickup: an air dam that goes down for highway travel, then retracts when I get off paved roads onto dirt.)

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 12-31-2009, 02:41 PM   #12 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 11,288
Thanks: 18,180
Thanked 5,999 Times in 3,653 Posts
possibly

Quote:
Originally Posted by jamesqf View Post
So you couldn't possibly add a couple of hinges, an actuator, and a range sensor to lift the thing out of the way? Or even have it retract if you're moving less than 35 mph or so?

(I've actually been thinking of something like this for my Toyota pickup: an air dam that goes down for highway travel, then retracts when I get off paved roads onto dirt.)
The first thing is to nail down the architecture of it,which yields the drag minimum.
It would need to articulate,hinges are low-tech,and all the big-boys and their supercars use them.
I would build with extremely low mass.I guess pre-preg epoxy carbon fiber remains the benchmark there.If you "sense" that the chin must lift,like "right-now",then the least inertia the better.
Your sensor needs to be fail-proof or have redundancy incorporated in so there's no "dead" activity.
Radio,acoustic,laser could all perform the ranging function,with some default minimum distance before,say,you fire a 12-VDC solenoid,which jerks the chin out of harm's way just in time.
Remember,the faster you drive,the briefer the event horizon before you tangle with road hazards.
I plan a simple cable operated front dam for the truck with a simple lever in the cab which I can operate like an emergency brake handle once I leave the city scape and get into highway operation where the dam will do it's work.
Even with a full bellypan,I'd rather the air go around than under the truck.
I give the idea the big thumbs-up and had hoped to already have it on the truck for what is now my aborted trip.
I say go for it,just don't get it so low it starts to add drag.And you may have to burn a little fuel trying to dial-in that magic dimension.Let us know how things fall together.And don't rush it,you don't want to end up like me,tearing up seven months work in seven hours!

  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Autospeed article: adding a chin undertray to a 1st gen Prius MetroMPG Aerodynamics 20 03-18-2014 05:31 PM
Airdam / Undertray / Splitter Construction Ideas TimRogers Aerodynamics 12 03-16-2009 10:14 PM
Airdam or Splitter? Nigel Aerodynamics 2 02-06-2009 11:39 AM
Upper front splitter apgrok1 Aerodynamics 3 05-16-2008 03:38 PM
New: Ford mods their Super Duty pickups ... chin spoiler + final drive changes MetroMPG EcoModding Central 1 01-08-2008 01:32 PM



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