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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 07-18-2014, 10:24 AM   #81 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 20,187
Thanks: 5,665
Thanked 6,607 Times in 5,326 Posts
The difusser will want to start early, as close to the rear axle as possible and be 2-12 from horizontal. The back bumper may be problematic. Consider D in the diagram above. The bumper could be replaced by two vertical nerf bars in the skegs (inverted tailfins) on either side.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 07-18-2014, 11:39 AM   #82 (permalink)
Master EcoModder
 
Join Date: Nov 2013
Location: john o groats
Posts: 277

beastie - '89 toyota hilux dolphin motorhome

Puggie - '98 Peugeot 406 Lx
Thanks: 35
Thanked 49 Times in 41 Posts
Hi freebeard
steel bumper on back is used to carry waste pipes for toilet and sinks. would rather not have them inside. was going to use bumper as a mounting point then fix other end over axle. other things i have to consider are the water tanks just in front of bumper. will draw a simple diagram of layout and my thpughts on smoothing out rear belly. on rear body thinking of adding a cut off boat tail running parallel with rear bumper. no not large but should have some benefit even it makes it more stable in crosswinds or when passing trucks.
Would like to thank everyone for their contributions so far. all mods so far have increased my mpg by 70%. which is a big success. ulimate goal is 110% increase this is a theroical limit due to engine gearing and drag.
  Reply With Quote
The Following 2 Users Say Thank You to chefdave For This Useful Post:
aerohead (07-18-2014), freebeard (07-23-2014)
Old 07-18-2014, 01:02 PM   #83 (permalink)
Master EcoModder
 
Join Date: Nov 2013
Location: john o groats
Posts: 277

beastie - '89 toyota hilux dolphin motorhome

Puggie - '98 Peugeot 406 Lx
Thanks: 35
Thanked 49 Times in 41 Posts
Hi
thinking of doing a short version of picture F on page of this discussion. have room for 3" half rounds tp fit ay rear of front doors. off on to internet to see if i can find some 6" pipe or 3" half rounds.
  Reply With Quote
The Following User Says Thank You to chefdave For This Useful Post:
aerohead (07-18-2014)
Old 07-23-2014, 04:08 PM   #84 (permalink)
Master EcoModder
 
Join Date: Nov 2013
Location: john o groats
Posts: 277

beastie - '89 toyota hilux dolphin motorhome

Puggie - '98 Peugeot 406 Lx
Thanks: 35
Thanked 49 Times in 41 Posts
Hi freebeard
have found 4 1/2 inch half rounds by accident had a piece of guttering lieing in garage and fits perfectly by front doors. best bit is buying new is so cheap. off this weekend so hope to get guttering and run trial.
  Reply With Quote
The Following User Says Thank You to chefdave For This Useful Post:
aerohead (07-23-2014)
Old 07-23-2014, 10:41 PM   #85 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 20,187
Thanks: 5,665
Thanked 6,607 Times in 5,326 Posts
Cool. Looking forward to the result. ...and the 'bellyplan'.

  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com