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Old 06-28-2015, 05:37 PM   #41
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Kinda like the old ciggy jingle....."me & my Wrangler, we got a real good thing-yeah!"
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Old 06-28-2015, 06:58 PM   #42
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Quote:
Originally Posted by cpaharley2008 View Post
I would be cautious about this as an information source. A few seconds of reading in, I hit this absolutely incorrect statement:
Quote:
The towing angle for a single axle is not important, so it doesn’t matter if the trailer is level as the trailer is able to rotate on its axle.
Tilting a single-axle trailer in pitch (nose up or down) changes the position of the centre of mass enough to make a noticeable difference in the weight distribution between axle and tongue, affecting stability. In some trailers it also causes aerodynamic problems.

The content goes further downhill from there. It does have some valid points, but I don't see how someone looking for basic information would be able to distinguish the information from garbage.
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Old 06-28-2015, 07:03 PM   #43
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Originally Posted by cpaharley2008 View Post
Also dual axles give you twice the braking power...
If you mean ability to absorb heat, yes, twice the number of brake drums (if they are the same size, as they are in Escapes) means twice the braking energy dissipated before overheating interferes with brake operation. This would be really significant if racing, or if dragging the brakes down a mountain grade instead of properly engine-braking.

The maximum amount of braking force is normally limited by tire traction, and traction is limited by weight. Spreading the weight between two axles would help traction a little due to more tire tread on the road, unless the load is imperfectly split between axles. In the reality of a tandem-axle trailer, it probably won't brake any more effectively than a single-axle trailer at all - certainly not twice as well.
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Old 06-28-2015, 07:09 PM   #44
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Also dual axles give you twice the braking power...
And two more tires when it's time to replace....
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Old 06-28-2015, 07:12 PM   #45
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Don't forget another set of brake pads and bearings to check and service.
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Old 06-28-2015, 07:17 PM   #46
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I remember cars with brakes only in the rear, took a lot effort to stop. Once 4 wheel brakes were standard, safety increased.
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Old 06-28-2015, 07:31 PM   #47
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And two more tires when it's time to replace....
Just be thankful it's not a diesel pusher with what--ten?--huge tires to replace. I don't even want to contemplate that.
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Old 06-28-2015, 07:51 PM   #48
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I remember cars with brakes only in the rear, took a lot effort to stop. Once 4 wheel brakes were standard, safety increased.
Jim,
Yes that's true! But they put another set of brakes on the same size and weight vehicle, in the case of the trailers the size and weight has increased.
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Old 06-28-2015, 08:02 PM   #49
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The 21 has a no-crawl over permanent bed. That and the slightly greater aisle width so you can pass each other without stepping on the dog made it for us. First time the grandkids overnighted (sleeping on the dinette bed) they wanted to know if they could move in. IMO, the 21 tows a LOT better than our 17 Casita and is much easier to back up as the axles are farther from the hitch, so it reacts slower than a shorter trailer.
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Old 06-28-2015, 08:03 PM   #50
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Originally Posted by cpaharley2008 View Post
I remember cars with brakes only in the rear, took a lot effort to stop. Once 4 wheel brakes were standard, safety increased.
Jim, we know you're older than some of us, but I'm surprised that you were driving cars made in the 1920's. I think maybe what you are remembering was in the introduction of power-assisted braking, using vacuum boosters... or perhaps the introduction of disk brakes (on the front only at first), which normally require power-assist to be usable.

Obviously, all of the weight of the vehicle must be used for braking traction to have good braking... but a single-axle trailer does have all of its weight on the wheels with brakes. A car with brakes only two wheels would indeed stop poorly, as would a tandem-axle trailer with brakes on only one axle. Motocycles stop very well (if you can control them), using only two brakes because all of their weight is on only two wheels.

A typical 18-wheeler has five axles. It does not stop over twice as well as a car or truck with two axles. Due to the hard high-mileage rubber compounds of the tires, the difficulty of balancing ten brakes, and relatively undersized brakes (compared to the mass of the truck and trailer), they don't brake very well at all.
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