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Old 08-08-2018, 08:52 PM   #29
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I am always towing 60 mph (which is likely 56-57) on cruise control. I am usually on the second lane from right (if there are more then two lanes), because there are tons of morons who don't know how to merge. I don't see any problem with towing 15-20 mph slower than the traffic.

I find it strange to feel obliged to keep up with the traffic.

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Originally Posted by DKB_SATX View Post
There are many places in the US with higher posted speeds than 70 mph. Texas has lots of 75 mph and some 80 mph stretches. There's even one 85 mph stretch on a tollway in central Texas. Texas doesn't mandate a lower speed limit for towing. That said, I don't tow my Airstream at 80 but neither do I imagine it would be a relaxing experience to tow it 55 on the interstate. I generally hang out to the right around 65-68 mph under those conditions.
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Old 08-08-2018, 09:01 PM   #30
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Trailer Brake Stopping Power as Percentage of Weight

Just a hard stop on the TV alone takes a lot of distance. With the trailer, I’d bet even longer. No fun in an emergency either way. And yeah, 65-68 max when towing, assuming decent weather and dry pavement if the limit is that high or higher.
Our rig is very stable up to 85, but when I noted the speed, I backed off gently. It eats a lot of gas at that speed, imho.
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Old 08-08-2018, 09:35 PM   #31
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I agree, I will rarely go above 60 mph... at this speed you can react and also brake from others on the road intent on cutting you upon, brake checking you etc.
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Old 08-09-2018, 07:56 AM   #32
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So will the trailer brakes stop the trailer from 80 mph or do the TV brakes need to pick up part of the trailer stopping?

Assuming you have drum brakes on the trailer and you were going 80 mph (or any speed) and slide the "full on" lever on the brake controller you will slow down - very slowly and gradual.

Stopping a trailer is always a combination of both the TV and trailer brakes. Drum brakes seem to be good at slowing down the trailer but not hard, fast stops in my experience. No matter how good of shape the drum brakes are on a trailer they will always be mediocre at best and I have always been anal about keeping the brake shoes properly and equally adjusted. The only time i have ever seen drum brakes on a trailer strong enough to lock up a wheel has been on an empty utility trailer.
It is always going to takes more distance to stop both a TV and trailer no matter if the TV is big or small. Do your best to keep some distance between you and the next vehicle or as the situation dictates.
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Old 08-09-2018, 10:35 AM   #33
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Applied amps= lock-up.

If I turn the TruControl up to max the AS brakes will lock.

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Old 08-09-2018, 08:15 PM   #34
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I guess the only way to tell would be to do a stopping test from speed for the rig and then again with just the TV. Not about to do that. But my experience with hard stops over the last 10 years with this rig indicates that my trailer does not nearly “stop itself” when set the way I run it. I do have it set to “ lead” a little so on a slow, easy stop the trailer does do a larger share than the truck. But in a hard stop from speed the trailer “pushes” a lot.
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Old 08-09-2018, 10:32 PM   #35
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The problem with California towing speed being set at 55 is when you are on a two lane road, not a multi-lane freeway. When driving at 55 and the limit for all other traffic is 65+, it creates some dangerous passing situations when people want to get around you. I don't need a 3-way head on accident, so I will drive at 65 when everyone else is. You Californians do what you want.
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Old 08-09-2018, 10:50 PM   #36
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Same applies to towing 65+...this creates some dangerous situations...

Don't get me wrong, I generally don't care how fast other people are driving. However, this is an objective fact that towing 65+ creates more risks than towing 55.

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(...) When driving at 55 and the limit for all other traffic is 65+, it creates some dangerous passing situations when people want to get around you.(...)
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Old 08-10-2018, 03:33 AM   #37
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Regardless of what they start out as, most towing threads end up turning into one of two things; A Propride vs. Everything Else "discussion", or truck vs. car "discussion". In the truck vs. car discussions braking performance is routinely brought up as an advantage of one over the other. Truck enthusiasts argue trucks are heavier, have larger brakes and more stopping power, while the car crowd cites more stability and better handling under braking.

All these discussion got me wondering, what percentage of an AS trailer's weight are the trailers brakes capable of stopping when you need to stop as fast as you can?

Of course there are loads of variables including, the specific model trailer, what brakes, are the brakes adjusted correctly, what payload, how fast can the TV brake, etc. So, the question and answers are of course going to be somewhat vague.

So is the OEM braking system in an AS designed to provide 100% of it's own braking power, or does is depend on the TV for a percentage of it? If so, what percentage do you think it is? If you have customized your brakes to disc, what percentage do you think you get?

Wild ass guesses are perfectly welcome.
My stopping distance doesn’t increase much with the trailer on. I would guess that 20% of the stopping effort for the trailer comes from the truck based on the slight increase in distance. I increase following distance accordingly when towing. Following too close can result in unnecessary braking which will heat up and fade drum brakes.
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Old 08-10-2018, 03:40 AM   #38
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Same applies to towing 65+...this creates some dangerous situations...

Don't get me wrong, I generally don't care how fast other people are driving. However, this is an objective fact that towing 65+ creates more risks than towing 55.
Go with the flow (within reason of course). Doing 55 across Michigan, Indiana, or Ohio would not be very enjoyable. If I can’t get something up to at least 62 (like an antique car) I take a secondary road. My main reason for getting an F350 was to have enough power to keep up with traffic and enough weight to not get blown around when doing a reasonable speed.
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Old 08-10-2018, 07:23 AM   #39
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Quote:
Originally Posted by Bill M. View Post
I guess the only way to tell would be to do a stopping test from speed for the rig and then again with just the TV. Not about to do that. But my experience with hard stops over the last 10 years with this rig indicates that my trailer does not nearly “stop itself” when set the way I run it. I do have it set to “ lead” a little so on a slow, easy stop the trailer does do a larger share than the truck. But in a hard stop from speed the trailer “pushes” a lot.
I've found the best way is to test is from a dead stop...max gain and pull forward.
I doo doo a 'panic' once in a while at a stadium lot near us just to get a baseline gain setting. The TruControl has an electronic gyro that will 'lead' the brake application at all gain settings. I can set it at the beginning of the trip for load and let it do the rest for changing conditions.

We use 'sweet spot' speed based on RPM...😍1800/2000=58/60mph, tow/haul in hilly terrain.



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Old 08-16-2018, 10:45 AM   #40
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When driving 55 on an interstate where the speed limit is between 70 and 80, you might have a different kind of problem, like getting rear ended.
Give us an example. Rural Interstate.

45 or 50-mph is the lower legal limit.
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Old 08-16-2018, 10:53 AM   #41
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I guess the only way to tell would be to do a stopping test from speed for the rig and then again with just the TV. Not about to do that. But my experience with hard stops over the last 10 years with this rig indicates that my trailer does not nearly “stop itself” when set the way I run it. I do have it set to “ lead” a little so on a slow, easy stop the trailer does do a larger share than the truck. But in a hard stop from speed the trailer “pushes” a lot.
WD setting probably off. TT brake amperage also suspect.

You’ve some work to do.

If all is correct, the rig will stop as fast or faster than the TV solo (use 50-mph testing).

It’s a GIGO problem. Most drums aren’t in operational spec. The working assumptions about trailer drums aren’t accurate as a result.

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Old 08-16-2018, 11:11 AM   #42
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Each to their level of Competency...

Each to their level of competency of driving and towing ability.

The best tow vehicle, the best trailer braking system, the best hitch will not protect anyone from someone who never could drive a straight line, judge safe braking distances from a vehicles in front, or understand passing a slower vehicle with approaching traffic takes excellent judgment.

Drive the highways long enough, many of the 'BEST' drivers in their mind, are those to avoid all of the time. They have no clue and never will. You be the judge of what speed and control over your time on the road. Be vigilant of those around you at all times.

A bad driver can roll his tow vehicle and trailer on a straight highway, without having you near them.
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