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Posted by Jim Wilkins on April 19, 2008, 6:07 pm
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> Looking at the 14 foot long one, does it seem like the axle is not
> placed right. I have been reading about how the ideal axle is placed
> in a 60/40 configuration. This seems to have the back axle too far
> forward? I like the trailer though.
Congratulations! You are beginning to do the math. Notice how it's a
new language that explains how things -really- work?
Jim Wilkins
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Posted by stryped on April 19, 2008, 7:23 pm
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>
> > Looking at the 14 foot long one, does it seem like the axle is not
> > placed right. I have been reading about how the ideal axle is placed
> > in a 60/40 configuration. This seems to have the back axle too far
> > forward? I like the trailer though.
>
> Congratulations! You are beginning to do the math. Notice how it's a
> new language that explains how things -really- work?
>
> Jim Wilkins
If it "really" works why is that compnany building trailers that dont
comply with the 60/40 concept?
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Posted by Don Foreman on April 20, 2008, 12:21 am
Please log in for more thread options On Sat, 19 Apr 2008 16:23:29 -0700 (PDT), stryped
>
>If it "really" works why is that compnany building trailers that dont
>comply with the 60/40 concept?
As a wild guess: these appear (on the website) to be primarily
intended as trailers for landscaping and lawn service use. They may
have learned from experience that such users tend to load trailers a
bit front-heavy -- drive the mower clear to the front sort of thing.
Makes it easier to secure the load. Lighter stuff gets tossed in the
back, and so on.
It certainly looks like Tex Trailer knows what they're doing ... and
they may also have learned how many of their customers use their
trailers.
Some users may also load other stuff on the tongue closer to the hitch
that has significant effect: e.g., welded-on tool boxes and/or spare
wheels. A spare wheel is a very good thing to have on a trailer.
If it is easy to move the axle back about 9", I'd do so. If it isn't
easy, I wouldn't worry about it.
It isn't hard to check tongue weight for a given load. Get a
yardstick or tape, measure height of hitch, then stand on hitch and
measure again. That deflection is your weight worth of tongue weight.
You can thereafter use the tape or yardstick to estimate tongue weight
of your load probably as closely as you can estimate the weight of the
load itself.
Hint: if you have Mama assist, have her do the measuring rather than
the standing. Muttering "HOLY SHIT" when she stands on the hitch
while you measure could cause instability -- and I'm not tawkin' 'bout
the trailer. <G>
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Posted by Tim Wescott on April 19, 2008, 8:00 pm
Please log in for more thread options On Sat, 19 Apr 2008 13:01:29 -0700, stryped wrote:
> Been researching trailers and found this:
> http://www.allstatetrailers.com/images/products/specsheet/30sa.pdf
>
> Looking at the 14 foot long one, does it seem like the axle is not
> placed right. I have been reading about how the ideal axle is placed in
> a 60/40 configuration. This seems to have the back axle too far forward?
> I like the trailer though.
>
> Also, how heavy does a single axle trailer need to be before you should
> put brakes on it?
>
> Thanks again!
Just load it right. It doesn't matter too much when the trailer is
unloaded -- it's when the trailer & load weight start to get close to, or
more than, the pulling vehicle weight that you need to start worrying.
I've seen trailers with the axles located exactly right but with the load
put too far back, fishtailing down the road -- it's not like the trailer
manufacturer can force the drivers to engage their brains.
--
Tim Wescott
Control systems and communications consulting
http://www.wescottdesign.com
Need to learn how to apply control theory in your embedded system?
"Applied Control Theory for Embedded Systems" by Tim Wescott
Elsevier/Newnes, http://www.wescottdesign.com/actfes/actfes.html
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Posted by Al Patrick on April 19, 2008, 9:24 pm
Please log in for more thread options stryped wrote:
> Been researching trailers and found this:
> http://www.allstatetrailers.com/images/products/specsheet/30sa.pdf
>
> Looking at the 14 foot long one, does it seem like the axle is not
> placed right. I have been reading about how the ideal axle is placed
> in a 60/40 configuration. This seems to have the back axle too far
> forward? I like the trailer though.
>
> Also, how heavy does a single axle trailer need to be before you
> should put brakes on it?
>
> Thanks again!
Stryped,
Take the total length of the BODY only and multiply by .4. You get
about 68. Yes, they have 78. That's about 10 inches difference. The
60/40 is a "rule of thumb" and doesn't have to be exact. You'll notice
they do not include the tongue. This reminds me. Does you 10' trailer
length include the tongue or are you allowing about 38 to 48" extra for
that?
Yes. You *should* put brakes on ANY trailer you plan to haul an 8N
tractor on. What are you planning to pull it with? As someone else
already mentioned the towing vehicle makes a lot of difference. If
you're pulling it with a 1 ton truck with dual wheels you *can* *get by*
without brakes a lot better than if you plan to pull it with a compact
automobile.
Al
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> placed right. I have been reading about how the ideal axle is placed
> in a 60/40 configuration. This seems to have the back axle too far
> forward? I like the trailer though.