Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 04-04-2008, 05:45 PM   #1
Senior Member
 
Join Date: Apr 2000
Location: Crossville,TN USA
Posts: 437
Well, I have been around long enough and am on my 4th MH, you would think I would know this like the back of my hand. Ain't so! This came up in a discussion the other day and a friend said well I could probably do the math calculation; but, what does it tell me. For the life of me I could not remember whether the higher or lower answer is what you shoot for.

How about a little help in dusting off my senility, and an example would be great,thanks, Ken,'04 DSDP....
__________________

__________________
Ken Roberts is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 04-04-2008, 05:45 PM   #2
Senior Member
 
Join Date: Apr 2000
Location: Crossville,TN USA
Posts: 437
Well, I have been around long enough and am on my 4th MH, you would think I would know this like the back of my hand. Ain't so! This came up in a discussion the other day and a friend said well I could probably do the math calculation; but, what does it tell me. For the life of me I could not remember whether the higher or lower answer is what you shoot for.

How about a little help in dusting off my senility, and an example would be great,thanks, Ken,'04 DSDP....
__________________

__________________
Ken Roberts is offline   Reply With Quote
Old 04-05-2008, 05:30 AM   #3
Senior Member
 
Workhorse Chassis Owner
Join Date: Sep 2007
Location: st.charles mo.
Posts: 1,194
I don't know of a formula but I do know the longer the wheel base the better the ride and handling. That is why busses have long wheel bases and some MH with long rear overhange have problems.
__________________
speed racer is offline   Reply With Quote
Old 04-05-2008, 10:02 AM   #4
SRT
Senior Member
 
SRT's Avatar
 
Monaco Owners Club
Join Date: May 2003
Location: Head of the Lakes, Minnesota
Posts: 575
IIRC, divide the wheelbase length (in inches) by the length (in inches). This gives you a percentage. Anything over 50% is "OK". Mine is 54% but there still was some tail wagging. But a rear "track bar" took care of the tail wagging.
__________________
FMCA# 266040 HRRVC# 84109
2000 32' HR Vacationer w/Banks
'98 Subaru Outback 5 spd toad
SRT is offline   Reply With Quote
Old 04-06-2008, 04:04 AM   #5
paz
Senior Member
 
paz's Avatar
 
Join Date: May 2005
Location: Full-timers - Home is where we park it.
Posts: 4,716
According to RV Consumers Group, anything under a 50% ratio is unacceptable. However, using only the formula, they ignore the actual balance of the motorhome. If an RV manufacturer puts all the water tanks, large storage compartments, washer/dryer, etc. behind the rear axle, the motorhome could be tail heavy even with a ratio over 50%. Likewise, there are many, many coaches on the road with a ratio under 50% that handle just fine.

The best bet is, if at all possible, test drive the actual floor plan you plan to buy and use the ratio as a guideline only.
__________________
2015 DRV Tradition 375KPS
2015 Chevy Duramax 3500HD LTZ Dually
Full-timers...Home is where we park it.
Check out our blog: Living Our Dream
paz is offline   Reply With Quote
Old 04-06-2008, 11:09 PM   #6
Registered User
 
Join Date: Jun 2005
Posts: 1,566
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by paz:
According to RV Consumers Group, anything under a 50% ratio is unacceptable. However, using only the formula, they ignore the actual balance of the motorhome. </div></BLOCKQUOTE>

Also keep in mind that the rv consumers group doesn't drive, own, rent, sit in, buy, touch or look at anything they "test". Send me $100 and I will give you my "ratings".
__________________
FrontRangeRVer is offline   Reply With Quote
Old 04-07-2008, 09:10 AM   #7
Senior Member
 
Join Date: Apr 2000
Location: Crossville,TN USA
Posts: 437
Thanks guys, now the old noodle can comprehend.

Oh, Forest Ranger, the check is in the mail!

Ken,'04 DSDP...
__________________
Ken Roberts is offline   Reply With Quote
Old 04-07-2008, 05:07 PM   #8
Senior Member
 
Spikester's Avatar
 
Newmar Owners Club
Join Date: Aug 2007
Location: Belfair WA.
Posts: 678
Don't believe everything you hear. Our motorhome is 33'10'" in length on an 190" wheel base (47%), unless I do not know what "tail wag" is, it is non-existent on this coach. The key is how well the coach is set on the wheel base. I had a 32' gas MH on 190" wheel base, it had tail wag, with a Diesel Pusher tail wag is less liking because the coach is more centered on the wheel base. The best way to tell about tail wag is the old test drive.

Spike
__________________
"Those who stand for nothing fall for anything"
2008 Newmar VTDP - 3330 - ISBXT 350 Spartan NVS
Toad - 2013 Mini Cooper S or 93 Nissan 4WD PU
FMCA F113720, NKK 18573
Spikester is offline   Reply With Quote
Old 04-13-2008, 04:46 PM   #9
Senior Member
 
HighwayRanger's Avatar
 
Join Date: Nov 2006
Location: Northern California
Posts: 293
We chose a 31' Class C, on the longest wheelbase they offered (215" or so, can't recall exactly). I don't notice anything other than a fairly light front end. I would think the front end would be even lighter with a shorter wheelbase.
__________________
Fulltimer Class of Late 2015, with my bride, Lori.
2015 GMC 3500HD Denali DRW CC LB TrailerSaver TS3
2016 DRV Mobile Suites 38RSB3, MorRyde IS
HighwayRanger is offline   Reply With Quote
Old 04-15-2008, 08:22 AM   #10
Senior Member
 
Workhorse Chassis Owner
Join Date: Jun 2003
Location: Palisade CO
Posts: 3,562
Regarding whether the ratio is better when it is smaller or larger - the less overhang the better.
So when you divide the wheelbase by the overall length a larger number is better.
Over .50 is desirable.
Example: For a 228 in wheelbase and a 35 foot motor home (420 inches) 228/420 = .54 - good.
For 228/400 = .57 - better (less overhang).
__________________
Clay WA5NMR - Ex Snowbird - 1 year, Ex Full timer for 11 years - 2004 Winnebago Sightseer 35N Workhorse chassis. Honda Accord toad.
Clay L is offline   Reply With Quote
Old 04-15-2008, 09:10 AM   #11
Senior Member
 
Tom N's Avatar
 
Winnebago Owners Club
Pond Piggies Club
Appalachian Campers
Mid Atlantic Campers
Join Date: Dec 2002
Location: Sarver, PA/Crystal River, FL/Shelocta, PA
Posts: 4,604
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Clay L:
Regarding whether the ratio is better when it is smaller or larger - the less overhang the better.
So when you divide the wheelbase by the overall length a larger number is better.
Over .50 is desirable.
Example: For a 228 in wheelbase and a 35 foot motor home (420 inches) 228/420 = .54 - good.
For 228/400 = .57 - better (less overhang). </div></BLOCKQUOTE>

But, there are many short wheel base, long coaches that handle perfectly.

-Tom
not a rv consumers group advocate
__________________
Sarver, PA/Crystal River, FL/Shelocta, PA FMCA 335149 W3TLN
2005 Suncruiser 38R W24, no chassis mods needed 2013 Honda Accord EX-L 2008 Honda Odyssey EX-L

Tom N is offline   Reply With Quote
Old 04-20-2008, 10:00 AM   #12
Junior Member
 
Join Date: Feb 2008
Posts: 7
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Also keep in mind that the rv consumers group doesn't drive, own, rent, sit in, buy, touch or look at anything they "test". Send me $100 and I will give you my "ratings". </div></BLOCKQUOTE>

I think it would be more fair to say they rate many units in which they have not done all of the above. When I joined the RV Consumers group I not only got their ratings I received a book that included scads and scads of pictures of every class of RV. These photos had been taken in the factory and/or in camping situations. They showed what to look for in terms of good construction, likely problem areas, etc. In other words....the "raters" been in a LOT of rigs. As for the ratio of wheel base to length of the rig, it is fundamentally sound to say that 50% and higher is better and below 50% is worse. Sure there can be exceptions to that rule, but you'd be well advised to check out any rig you intend to buy and see how it handles, especially if the "formula" calculation falls below 50%.
__________________
Clarkie
Richard Clark is offline   Reply With Quote
Old 04-20-2008, 10:47 AM   #13
Senior Member
 
Tom N's Avatar
 
Winnebago Owners Club
Pond Piggies Club
Appalachian Campers
Mid Atlantic Campers
Join Date: Dec 2002
Location: Sarver, PA/Crystal River, FL/Shelocta, PA
Posts: 4,604
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">As for the ratio of wheel base to length of the rig, it is fundamentally sound to say that 50% and higher is better and below 50% is worse. Sure there can be exceptions to that rule </div></BLOCKQUOTE>

Ok, since you have the CD give us some examples of good handling motorhomes that fall in the 50% and under catagory.

-Tom
__________________
Sarver, PA/Crystal River, FL/Shelocta, PA FMCA 335149 W3TLN
2005 Suncruiser 38R W24, no chassis mods needed 2013 Honda Accord EX-L 2008 Honda Odyssey EX-L

Tom N is offline   Reply With Quote
Old 04-21-2008, 06:24 PM   #14
Senior Member
 
Easyrider's Avatar


 
Workhorse Chassis Owner
Join Date: Dec 2004
Location: Baraboo, Wisconsin
Posts: 1,565
How are we defining "better"? A long wheelbase will give a "better" ride but will also need more room to turn. We have been in some campgrounds that we could not have made it around some end of the road turnarounds if our motorhome had a longer wheelbase. I would say our motorhome has a nice compromise wheelbase to length ratio. It handles reasonably well on the highway with the rear trac bar added, and turns tight enough to get us easily around in parking lots and campgrounds. I'd like the looks of our motorhome better if it didn't have as much hanging past the back axel, but it wouldn't turn as sharp as it does now if the wheelbase were longer.
__________________

__________________
Steve & Nancy
2005 Itasca Sunrise 33', W20 Chassis, Ultrapower, Henderson Trac Bar
2012 Chevy Captiva Sport AWD, ReadyBrute Elite Tow Bar, Blue Ox Base Plate, Protect-A-Tow
Easyrider is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
wheelbase to length ratio Tony G Class C Motorhome Discussions 3 02-06-2008 05:29 PM
Wheelbase to Length Ratio ehackney Class A Motorhome Discussions 2 12-19-2006 04:36 PM
LENGTH OF 5TH WHEEL Lana Full-Timers 18 06-27-2006 12:24 PM
Length of 5th wheel Lana 5th Wheel Discussion 21 03-21-2006 05:25 AM
LENGTH OF 5TH WHEEL New Member Check-In 18 12-31-1969 07:00 PM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 06:53 PM.


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