Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×


Reply
 
Thread Tools Display Modes
 
Old 12-07-2020, 10:20 PM   #1
Mini-Skoolie
 
Join Date: Dec 2020
Posts: 15
Ground clearance, wheelbase and departure angle

Hey all,

Was hoping someone could give me some general info on a dog nose. I'm looking to see if I can park a schoolie behind my house because of my steep 22% 75' long driveway. It's surveyed and in CAD, what I need is a rough side view diagram of a dog nose to make a "virtual" bus I can check to see if the back will bottom out going up at the bottom or the middle will high center on the upper vertical curve.

I was hoping for a 36ish foot bus. I know it'll change from bus to bus, just hoping for rough numbers of an example to see if it's somewhat doable. If I'm close I don't mind working the driveway vertical curves to get me the rest of the way or putting planks down ect

Shea_G is offline   Reply With Quote
Old 12-08-2020, 01:12 AM   #2
Bus Nut
 
BeNimble's Avatar
 
Join Date: Jul 2020
Location: Sacramento
Posts: 865
Year: 1999
Just pick a bus model and look at pics of them to estimate it. School Buses sit up pretty high, but some have rather long rear overhangs.
You need the power to climb that grade as well.
BeNimble is offline   Reply With Quote
Old 12-08-2020, 10:17 AM   #3
Bus Crazy
 
Join Date: Feb 2019
Location: New Hampshire
Posts: 1,141
Year: 1990
Coachwork: Thomas 4 window w/lift
Chassis: G30~Chevy cutaway
Engine: 5.7/350 Chevy Vortec
Rated Cap: Just me and my "stuff"?
Hope you don't live anywhere that temps drop below freezing, as a light coating of ice on a 22% grade would pose problems for even a 4x4 to ascend!
peteg59 is offline   Reply With Quote
Old 12-08-2020, 11:04 AM   #4
Bus Crazy
 
Ronnie's Avatar
 
Join Date: Oct 2017
Location: Virginia
Posts: 2,000
Year: 1971
Coachwork: Wayne
Chassis: International Loadstar 1700
Engine: 345 international V-8
I can measure the departure angle on a bluebird we have here. It is a 34ft 11 window dog nose.
Ronnie is offline   Reply With Quote
Old 12-08-2020, 11:10 AM   #5
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 14,859
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
you also need something that is geared low enough that you dont stall the transmission on the way up.. 22% is a LOT of grade for a many 1000s pound bus .. diesels have a lot of low end torque but it is possible to stall the torque converter to where essentially the bus wont move because it cant make the torque to lift the weight.. esp if there is any resistance like its a dirt or gravel driveway..
cadillackid is offline   Reply With Quote
Old 12-08-2020, 11:42 AM   #6
Bus Nut
 
Join Date: Oct 2019
Location: Wake Forest NC
Posts: 455
Year: 1998
Coachwork: Thomas
Chassis: Vista 3600
Engine: T444E
Rated Cap: 24000 lbs
this is where, and likely the only time lol, that I would say NOT to buy a Vista

we are pretty low profile

front is very low, arse is high

yet inside is level

it's a bit odd like the Tardis in this way

but I am waay limbo low in the front clearance area
RolesvilleMarina is offline   Reply With Quote
Old 12-08-2020, 12:00 PM   #7
Bus Crazy
 
Ronnie's Avatar
 
Join Date: Oct 2017
Location: Virginia
Posts: 2,000
Year: 1971
Coachwork: Wayne
Chassis: International Loadstar 1700
Engine: 345 international V-8
Quote:
Originally Posted by cadillackid View Post
you also need something that is geared low enough that you dont stall the transmission on the way up.. 22% is a LOT of grade for a many 1000s pound bus .. diesels have a lot of low end torque but it is possible to stall the torque converter to where essentially the bus wont move because it cant make the torque to lift the weight.. esp if there is any resistance like its a dirt or gravel driveway..



In the 4x4 world crawl ratio is what gets attention. With low range and a very low 1st gear it is a very slow walk, great for pulling steep grades. Thing is most buses do not have that.
Ronnie is offline   Reply With Quote
Old 12-08-2020, 12:01 PM   #8
Skoolie
 
Join Date: Oct 2016
Location: Rochester NY
Posts: 108
Year: 1986
Coachwork: Blueburd
Chassis: International S1800
Engine: 9.0L International Diesel NA
37 ft dognose

Feel free to steal the photo from instagram if it helps. I can pull dims over the weekend. Send me a pm if you need more
Attached Images
File Type: jpg Screenshot_20201208-125907.jpg (200.0 KB, 11 views)
Rochey6957 is offline   Reply With Quote
Old 12-08-2020, 12:27 PM   #9
Bus Crazy
 
Ronnie's Avatar
 
Join Date: Oct 2017
Location: Virginia
Posts: 2,000
Year: 1971
Coachwork: Wayne
Chassis: International Loadstar 1700
Engine: 345 international V-8
34 bluebird 10x 22.5 tires, 11ft from center of axle to bumper, 14 degree departure angle.


6 window Amtran (international) 22.5 low profile tires. 7ft from center of axle to bumper, 18degree departure angle.


The shorty might be close if it had 10x 22.5 or even 11x22.5 tires. Both buses have rear exhaust that would have to be re routed to allow the angle measured. Neither bus has "crawl" gears.


Army deuce and a half? that would do it. Or unimog
Ronnie is offline   Reply With Quote
Old 12-08-2020, 06:56 PM   #10
Bus Nut
 
Meathead's Avatar
 
Join Date: Apr 2018
Location: New Orleans
Posts: 322
Year: 2001
Coachwork: Thomas
Engine: 3126b 210hp
Rated Cap: 48
Just get a running start at it! (Driveway)

And donít worry about those sparks!

Peace!
__________________
Dave
Meathead is offline   Reply With Quote
Old 12-11-2020, 08:02 AM   #11
Mini-Skoolie
 
Join Date: Dec 2020
Posts: 15
Quote:
Originally Posted by Ronnie View Post
34 bluebird 10x 22.5 tires, 11ft from center of axle to bumper, 14 degree departure angle.


6 window Amtran (international) 22.5 low profile tires. 7ft from center of axle to bumper, 18degree departure angle.


The shorty might be close if it had 10x 22.5 or even 11x22.5 tires. Both buses have rear exhaust that would have to be re routed to allow the angle measured. Neither bus has "crawl" gears.


Army deuce and a half? that would do it. Or unimog
Thanks a ton, any idea on the ground clearance on those in between the axles (the most likely place it would high center cresting a peak)
Shea_G is offline   Reply With Quote
Old 12-11-2020, 08:08 AM   #12
Mini-Skoolie
 
Join Date: Dec 2020
Posts: 15
As far as the hill climb and ice goes, it would be a once a year climb in spring and I was thinking worst case I go slow, and use my truck and a tow rope to give it a little extra assisted pull going up. Thanks for all the replies btw, I sent you a pm Ronnie.
Shea_G is offline   Reply With Quote
Old 12-12-2020, 07:36 PM   #13
Bus Crazy
 
Ronnie's Avatar
 
Join Date: Oct 2017
Location: Virginia
Posts: 2,000
Year: 1971
Coachwork: Wayne
Chassis: International Loadstar 1700
Engine: 345 international V-8
Ground clearance in the middle is about the same angle and distance. Do not see a pm?
Ronnie is offline   Reply With Quote
Old 12-12-2020, 08:34 PM   #14
Bus Geek
 
Join Date: Sep 2015
Posts: 3,851
Year: 2002
Coachwork: Thomas Built Bus
Chassis: Freightliner FS65
Engine: Caterpillar 3126E Diesel
Rated Cap: 71 Passenger- 30,000 lbs.
Quote:
Originally Posted by Shea_G View Post
Hey all,

Was hoping someone could give me some general info on a dog nose. I'm looking to see if I can park a schoolie behind my house because of my steep 22% 75' long driveway. It's surveyed and in CAD, what I need is a rough side view diagram of a dog nose to make a "virtual" bus I can check to see if the back will bottom out going up at the bottom or the middle will high center on the upper vertical curve.

I was hoping for a 36ish foot bus. I know it'll change from bus to bus, just hoping for rough numbers of an example to see if it's somewhat doable. If I'm close I don't mind working the driveway vertical curves to get me the rest of the way or putting planks down ect

I posted a set of departure angle diagrams for Thomas buses on this thread:


https://www.skoolie.net/forums/f33/t...les-31264.html


Cheers!
Native is offline   Reply With Quote
Old 12-17-2020, 07:01 PM   #15
Mini-Skoolie
 
Join Date: Aug 2019
Location: Las cruces nm
Posts: 46
Year: 97
Coachwork: Carpenter
Chassis: International
Engine: T444e
Rated Cap: 25,500
ground clearance

Not counting ice and traction and power issues, what really matters for ground clearance is the transition distance from flat to 22 deg. A long slow ramp will have more room for clearance than a short one. A surveyor's level and a tape measure will tell.
Studedude is offline   Reply With Quote
Old 12-17-2020, 07:28 PM   #16
Bus Geek
 
musigenesis's Avatar
 
Join Date: Jan 2019
Location: Philadelphia
Posts: 5,378
Year: 2003
Coachwork: International
Chassis: CE 300
Engine: DT466e
Rated Cap: 65C-43A
Do you plan to work on the bus while it's parked like this? Moving around inside would be pretty difficult at that angle. I'll never complain about my one-foot drop again if you are.
__________________
Rusty 87 build thread
musigenesis is offline   Reply With Quote
Old 12-17-2020, 07:41 PM   #17
Bus Geek
 
musigenesis's Avatar
 
Join Date: Jan 2019
Location: Philadelphia
Posts: 5,378
Year: 2003
Coachwork: International
Chassis: CE 300
Engine: DT466e
Rated Cap: 65C-43A
bumperangles.png

My bus is a typical 35-footer. I think the angle of the green line from the bottom of the rear tire to the bottom of the bumper is maybe 6 degrees / 10% grade (?) but for sure a lot less than 22%.
__________________
Rusty 87 build thread
musigenesis 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 11:37 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2021, vBulletin Solutions, Inc.