|
|
09-09-2013, 10:14 AM
|
#29
|
Senior Member
Newmar Owners Club Freightliner Owners Club
Join Date: Mar 2012
Location: Weston, Fl.
Posts: 916
|
Quote:
Originally Posted by Card3550
NEED SOME ADVISE HERE FROM SOME VETERAN RVrs
PLAN ON TOWING A F150 BEHIND A EMBARK(SUPER C)
WEIGHT OF MH IS OVER 33K, DO I NEED BRAKING SYSTOM ON THE F150
|
YES, YES, YES, Nothing more to say about the subject. Lots of systems out there that will do the job. Enjoy...
__________________
2003 Newmar Kountry Star 3905, Freightliner XC chassis with CAT 330. Winnie the black lab, pretty Airbus captain wife, retired airline pilot with 11 grandkids. UH-1 pilot (Huey) U.S. Army 1967-1983. RVN 68-69. Northern Idaho my summer home.
|
|
|
|
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!
|
09-09-2013, 12:57 PM
|
#30
|
Registered User
Join Date: Mar 2010
Posts: 8,777
|
Quote:
Originally Posted by RustyJC
Interesting rationalization, but the fact remains that your rig will stop in a shorter distance WITH toad brakes than WITHOUT them.
Rusty
|
Rusty
Do you have any tests or facts to back that up... or is that simply speculation/opinion?
It would be interesting compare the actual stopping distance of my coach/toad, (a combination that weighs under 23,500 lbs., and which is equipped with with 4 corner disc brakes designed to safely stop 24,000 lbs)..... compared to the actual stopping distance of some of the behemoths I see pulling 4,500 lb. toads with auxiliary brakes.
My light weight coach/toad combination may stop in a much shorter distance than many other coaches towing.
That's my opinion, (you are entitled to yours).
Mel
'96 Safari Sahara
|
|
|
09-09-2013, 01:01 PM
|
#31
|
Moderator Emeritus
Join Date: Jan 2007
Location: Litchfield Park, Arizona
Posts: 10,530
|
Quote:
Originally Posted by mel stuplich
My light weight coach/toad combination may stop in a much shorter distance than many other coaches towing.
Mel
'96 Safari Sahara
|
I'm sure that's true, but Rusty's point as I understood it was that your particular rig will probably stop more quickly with toad brakes than without them... and if you find yourself in one of those "only had one foot to spare" situations it could come in handy. Seems to make sense to me.
Rick
__________________
Rick, Nancy, Peanut & Lola our Westie Dogs & Bailey the Sheltie.
2007 Itasca Ellipse 40FD
|
|
|
09-09-2013, 01:04 PM
|
#32
|
Senior Member
Fleetwood Owners Club iRV2 No Limits Club
Join Date: Sep 2012
Location: Rainbow Riding
Posts: 18,574
|
Quote:
Originally Posted by mel stuplich
Right you are!
I would NEVER tow if my coach brakes are NOT WORKING... (and I would NEVER drive my toad if it's brakes where NOT working).
However, since the combined weight of my loaded coach and toad is LESS than the GVWR, (Gross Vehicle Weight Rating), of my coach, I use no auxiliary brake system in/on/for my '07 Saturn ION toad.
Mel
'96 Safari
|
In another thread that wandered into mountain braking you asked me
"Do use your cruise control when driving in mountain roads?
I didn't think anyone did.
I only feel safe/comfortable driving mountainous, (and/or very hilly), roads if/when I'm in control!
Mel
'96 Safari"
I have to ask you the same question now - do you feel in control without aux brakes - and especially when in mountainous conditions? Also - is there a reference to cite on your formula that tells you aux brakes are not needed when the conditions you describe are met - recognizing that many states see it differently. Again - trying to learn here. A Wrangler is in my future - and I have already decided it will have aux brakes, but using your approach, neither I nor anyone that isn't overloaded doesn't need them.
For others and not to divert thread - I was referring to using cruise on a straight and slight grade - that I was told had a 55 - 60 mph descent on the other side. Math quiz - what is an angle > 90 degrees but < than 180 degrees called? Anyone?
__________________
Steve & Annie (RVM2)
2008 Fleetwood Bounder 38F ~ 325 ISB Turbo ~ Freightliner XC 2014 CR-V ~ Invisibrake / Sterling All Terrain
Sioux Falls, SD (FullTime Since Nov 5th 2014)
|
|
|
09-09-2013, 01:06 PM
|
#33
|
Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
|
Quote:
Originally Posted by Rich and Cork
Here is a summary by state of towed vehicle brake requirements, with links to the state statutes:
Toad Brake Requirements
|
That's the most accurate one I've seen yet, it has CA, OR and WA correct, which is a rarity!
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
|
|
|
09-09-2013, 01:08 PM
|
#34
|
Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
|
Quote:
Originally Posted by RickO
I'm sure that's true, but Rusty's point as I understood it was that your particular rig will probably stop more quickly with toad brakes than without them... and if you find yourself in one of those "only had one foot to spare" situations it could come in handy. Seems to make sense to me.
Rick
|
RaodMaster web site shows that an RV will stop shorter with a towed braking system than without it, but still not quite as short as the RV alone. Pretty sure they've tested their systems.
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
|
|
|
09-09-2013, 01:16 PM
|
#35
|
Senior Member
Fleetwood Owners Club iRV2 No Limits Club
Join Date: Sep 2012
Location: Rainbow Riding
Posts: 18,574
|
Quote:
Originally Posted by RickO
I'm sure that's true, but Rusty's point as I understood it was that your particular rig will probably stop more quickly with toad brakes than without them... and if you find yourself in one of those "only had one foot to spare" situations it could come in handy. Seems to make sense to me.
Rick
|
I agree here 100% - but isn't every vehicle of any kind equipped with brakes to stop it in a legal and known distance? Whether it can stop in a shorter distance doesn't seem to outweigh the need for a breakaway - and aux brakes when towing a car 4 down. Brakes obviously work harder under heavier weight - and are more likely to get hot stopping more weight from any source - toad or no toad. Isn't having aux brakes helping slow it all down, thus reducing heat, and improving stopping distance? I know Mel has asked another for specs - but isn't there some physics behind this that doesn't need explanation? Again - first toad is in my future. Trying to learn something here. Kind of hard to do when someone says - not needed - some states require it - some don't etc. I'm going to go with aux brakes.
__________________
Steve & Annie (RVM2)
2008 Fleetwood Bounder 38F ~ 325 ISB Turbo ~ Freightliner XC 2014 CR-V ~ Invisibrake / Sterling All Terrain
Sioux Falls, SD (FullTime Since Nov 5th 2014)
|
|
|
09-09-2013, 01:18 PM
|
#36
|
Senior Member
Join Date: Aug 2012
Posts: 852
|
I tried driving and stopping both with and without the braking system. You can feel and measure the increase in stopping force with the system.
__________________
1998 Newmar Dutch Star, 3126B Cat/ Freightliner
2003 Honda Element
" Don't let the same dog bite you twice "
|
|
|
09-09-2013, 01:19 PM
|
#37
|
Senior Member
Texas Boomers Club
Join Date: Jul 2000
Location: Cypress, Texas USA
Posts: 8,854
|
Quote:
Originally Posted by mel stuplich
Rusty
Do you have any tests or facts to back that up?
|
Well, for starters, how about Newton's second law of motion, in this case a = f / m where a is the acceleration of a body (in this case, your MH/toad combo), f is the force acting on the body and m is the mass of the body (again, your MH/toad combo).
The additional braking force (f (total) = f(toad) + f (MH)) created by the braked toad wheels will produce a greater negative acceleration (a) which will result in reduced stopping distances as compared to a body with the same mass and no toad braking.
Rusty
|
|
|
09-09-2013, 01:34 PM
|
#38
|
Moderator Emeritus
Join Date: Jan 2007
Location: Litchfield Park, Arizona
Posts: 10,530
|
Quote:
Originally Posted by flaggship1
Math quiz - what is an angle > 90 degrees but < than 180 degrees called? Anyone?
|
That's an obtuse question.
__________________
Rick, Nancy, Peanut & Lola our Westie Dogs & Bailey the Sheltie.
2007 Itasca Ellipse 40FD
|
|
|
09-09-2013, 01:38 PM
|
#39
|
Senior Member
Monaco Owners Club
Join Date: Nov 2007
Posts: 173
|
Do you have any tests or facts to back that up... or is that simply speculation/opinion?
Well, to get boring and drag out old history, here's the physics from a post a little over a year ago:
Not to interject too much fact, but thy physics says that the distance to stop if you brakes are strong enough to bring your tires to a stop (skid) and you either lock them up or stop just short of skidding will be
K * 1/2 * V * V * (Mrv+Mt)/Mrv
Where K is an ugly constant that involves the local gravitational constant, the coefficient of static (or sliding if you're skidding) friction of your tires on whatever kind of pavement you're on, etc.
V is your speed
Mrv is the mass (weight) of the RV, Mt is the mass (weight) of the toad.
Note that the important thing is the term at the end is the ratio of the total weight to the weight on the tires that are being braked.
The problem is that the weight of the the toad isn't helping to generate any stopping force because it isn't pressing down on any of the braking tires, but the force generated
by the OTHER tires still has to decelerate it.(i.e. it participates in the F=MA equation to determine how fast you decelerate, but not in the F=KM expression to generate the braking force)
You want the 30% figure mentioned earlier in the thread - take a gasser w/18000 GVW (typical ford chassis) fully loaded and tow a 5000 lb toad. 23000/18000 = 1.27 - it'll take you 27% longer to stop. Decide that since your toad is so heavy you'll stop short of the MGVW of your rig and only load it to 17000 lbs - now it takes you 29% longer to stop...
And your 30k lb diesel pusher isn't much better off - 35000/30000 = 1.16 - still almost 20% extra stopping distance, and they're usually rated to tow 10k, so some may have toads weighing considerably more.
You can argue about the laws of the state all you want, but the laws of physics don't care.
That's why I didn't tow until I had a braking system in the toad.
__________________
2002 HR Endeavor
|
|
|
09-09-2013, 02:02 PM
|
#40
|
Registered User
Join Date: Mar 2010
Posts: 8,777
|
Quote:
Originally Posted by flaggship1
I have to ask you the same question now - do you feel in control without aux brakes - and especially when in mountainous conditions? Also - is there a reference to cite on your formula that tells you aux brakes are not needed when the conditions you describe are met - recognizing that many states see it differently. Again - trying to learn here. A Wrangler is in my future - and I have already decided it will have aux brakes, but using your approach, neither I nor anyone that isn't overloaded doesn't need them.
|
flaggship
Fortunately I do!
However, if I did not.... OR if my combined coach/toad weight exceeded the braking capabilities of my coach.... OR if I knew of anyone who got a citation for not having toad brakes..... I would have auxiliary brakes on my Saturn.
IMO toad brakes often simply give coach owner/drivers a false sense of security..... (there is nothing wrong with that).
BTW, Chicken Little convinced both Henny Penny and Ducky Lucky that the sky was falling...... remember how that worked out?
Mel
'96 Safari, (105 k miles towing).
|
|
|
09-09-2013, 02:10 PM
|
#41
|
Senior Member
Fleetwood Owners Club iRV2 No Limits Club
Join Date: Sep 2012
Location: Rainbow Riding
Posts: 18,574
|
^^^ I'm going to file this acorn with the - I never needed a Surge Protector and Never had a water pressure regulator for 30 years posts and use all three. Enjoy the journey Mel. You keep things interesting, that's for sure.
__________________
Steve & Annie (RVM2)
2008 Fleetwood Bounder 38F ~ 325 ISB Turbo ~ Freightliner XC 2014 CR-V ~ Invisibrake / Sterling All Terrain
Sioux Falls, SD (FullTime Since Nov 5th 2014)
|
|
|
09-09-2013, 02:37 PM
|
#42
|
Senior Member
Join Date: Aug 2012
Posts: 852
|
My father used to say "There are none so blind as those who will not see"
__________________
1998 Newmar Dutch Star, 3126B Cat/ Freightliner
2003 Honda Element
" Don't let the same dog bite you twice "
|
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
|