Reply
 
Thread Tools Display Modes
 
Old 03-27-2019, 12:47 AM   #1
Bus Nut
 
Sleddgracer's Avatar
 
Join Date: Nov 2018
Location: south east BC, close to the Canadian/US border
Posts: 611
Chassis: still looking for my bus
bus aerodynamics

https://www.tc.gc.ca/en/programs-pol...cks-buses.html
Sleddgracer is offline   Reply With Quote
Old 03-27-2019, 01:17 AM   #2
Bus Crazy
 
turf's Avatar
 
Join Date: Apr 2013
Location: Colorado
Posts: 1,587
Year: 1993
Coachwork: bluebird
Engine: 5.9 Cummins, Allison AT1545
Rated Cap: 2
if money were no object, i've been dreaming up a boattail i want to try to lessen the drag
__________________
.
Turfmobile Build Thread
turf is offline   Reply With Quote
Old 03-27-2019, 02:11 AM   #3
Bus Nut
 
Join Date: Sep 2015
Posts: 308
Year: 2002
Coachwork: Thomas Built Bus
Chassis: Freightliner FS65
Engine: Caterpillar 3126E Diesel
Rated Cap: 71 Passenger- 30,000 lbs.
That was an interesting read, thank you!
Native is offline   Reply With Quote
Old 03-27-2019, 02:14 AM   #4
Bus Nut
 
Join Date: Sep 2015
Posts: 308
Year: 2002
Coachwork: Thomas Built Bus
Chassis: Freightliner FS65
Engine: Caterpillar 3126E Diesel
Rated Cap: 71 Passenger- 30,000 lbs.
Quote:
Originally Posted by turf View Post
if money were no object, i've been dreaming up a boattail i want to try to lessen the drag

According to that article, you do not need a full boat tail, just 24-32 inches. Heck, you have probably seen tractor-trailers with those "box-kite"-like farings on the back end. That is what they are for ... to reduce the drag on the end.
Native is offline   Reply With Quote
Old 03-27-2019, 06:11 AM   #5
Bus Nut
 
Join Date: Oct 2017
Location: Virginia
Posts: 684
Year: 1971
Coachwork: Wayne
Chassis: International Loadstar 1700
Engine: 345 international V-8
I wonder how much difference the tails on trucks actually do? a few percent, 10%, 20%?
Ronnie is offline   Reply With Quote
Old 03-27-2019, 06:27 AM   #6
Bus Nut
 
Join Date: Oct 2017
Location: Virginia
Posts: 684
Year: 1971
Coachwork: Wayne
Chassis: International Loadstar 1700
Engine: 345 international V-8
It will take a while to fully read this article, but seems worth it, thanks for posting.
Ronnie is offline   Reply With Quote
Old 03-27-2019, 07:40 AM   #7
Bus Crazy
 
turf's Avatar
 
Join Date: Apr 2013
Location: Colorado
Posts: 1,587
Year: 1993
Coachwork: bluebird
Engine: 5.9 Cummins, Allison AT1545
Rated Cap: 2
this isnt a new article.

i believe it states that about half of the drag comes from the front, and half comes from the back. a tail only should be 5% fuel savings. wheel covers will get you another 2-3%
__________________
.
Turfmobile Build Thread
turf is offline   Reply With Quote
Old 03-27-2019, 11:13 AM   #8
Bus Nut
 
Sleddgracer's Avatar
 
Join Date: Nov 2018
Location: south east BC, close to the Canadian/US border
Posts: 611
Chassis: still looking for my bus
I've been thinking that a 10% fuel saving would amount to a lot of money in the end - I doubled my mileage from 3 1/2 mpg to 7 mpg by adding a concave scoop to the front of an awkward load on one truck I had, so I know from experience how much an afternoon's work can save in fuel - I'm likely going to be doing a roof raise when I get my bus and I'll seriously consider getting rid of the typical flat forehead of a school bus and do a nice swooping roof line up to the transition, perhaps over an area 10' long - an air dam under the bumper , plus some hub caps ( who doesn't like a shiny set of hub caps on an old vehicle? ) - I haven't looked in to a fairing at the back yet, but if it can save even 1 or 2%, long term, would be worth a bit of fabrication - I don't know if a 'bug shield' on the hood would help or not, but it might help direct the airflow past that flat sail of the windshield - apparently mirrors can add significant drag, so perhaps a bit less ambitious set of mirrors would help along with one or two back up cameras - I recently put a new set of trailer towing mirrors on my pickup - they extend outwards when you need them and give a nice area of view - not as good as a set of West Coast mirrors maybe, but pretty good and certainly less drag than the West Coast mirrors - so if all that gets me a 10% saving, I'll save a couple hundred dollars each time I travel north in the winter
Sleddgracer is offline   Reply With Quote
Old 03-27-2019, 12:34 PM   #9
Bus Geek
 
Join Date: May 2016
Location: Eastern WA
Posts: 3,993
Year: 2002
Coachwork: Bluebird
Chassis: All American RE (A3RE)
Engine: Cummins ISC (8.3)
Rated Cap: 72
Neat site discussing economy minded mods: https://ecomodder.com/forum/showthre...ero-34627.html
PNW_Steve is offline   Reply With Quote
Old 03-27-2019, 04:35 PM   #10
Bus Nut
 
Sleddgracer's Avatar
 
Join Date: Nov 2018
Location: south east BC, close to the Canadian/US border
Posts: 611
Chassis: still looking for my bus
Quote:
Originally Posted by PNW_Steve View Post
Neat site discussing economy minded mods: https://ecomodder.com/forum/showthre...ero-34627.html
I enjoyed that site and learned a bit at the same time
Sleddgracer 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


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 06:07 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.