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Old 08-16-2018, 11:21 AM   #43
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Originally Posted by slowmover View Post
If all is correct, the rig will stop as fast or faster than the TV solo (use 50-mph testing)

This is what I was initially asking and probably how I should have worded my question, or a variation on it such as: "If all is correct, will a TT/TV rig stop slower or as fast (or faster) than the TV solo."

The warnings and recommendations about driving defensively and such are excellent and should be followed, but from some people's responses, knowing that a TT/TV rig should be able to stop just as well as a TV solo seems to be something a lot of people have not considered possible or attainable.

Good info to have, now I can get out and do some testing and see where I stand.
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Old 08-16-2018, 12:22 PM   #44
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@smith creek:
"If all is correct, will a TT/TV rig stop slower or as fast (or faster) than the TV solo."

My 2001 Safari 25 (6300#) with 4-12x2 drum brakes - as fast or faster. Brake Controller gain set just below lockup.


My 2002 Classic 30 Slideout (9100#) with 4-12x2 drum brakes - Way slower, borders on scary. Brake controller gain set to max. Unable to lock wheels. With this rig I had to maintain a gap to the vehicle in front so large that someone was always filling it.


My 2002 Classic 30 Slideout with 4-12" Kodiak Discs and Hydrastar Actuator - as fast or faster. Brake controller gain set just below lockup. I just did 6 weeks and 8000 miles out west with grades up to 10% and had no problems.

Note: "as fast or faster" is my opinion only, not based on objective tests. I did a test (referenced in an earlier post) that showed the discs approximately doubled the braking power of the Classic.



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Old 08-16-2018, 12:23 PM   #45
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“...knowing that a TT/TV rig should be able to stop just as well as a TV solo seems to be something a lot of people have not considered possible or attainable.”

Still have some doubts about whether that is attainable on an across all conditions basis. Maybe once on a straight line on dry pavement with the gain set up for the test. I do not keep my drum trailer brakes set so they will lock on dry pavement. Do you? My controller is advertised as proportional but it is not as proportional as the TV brakes. My TV brakes are antilock. My trailer brakes are not.

Slowmover is correct in my case. I am willfully ignorant because I feel okay about towing with my “poorly setup” 3/4 ton 4 wheel drive. But my new Subaru Forrester will stop in a whole lot less distance and is more manevurable.
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Old 08-16-2018, 01:49 PM   #46
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Quote:
Originally Posted by smithcreek View Post
This is what I was initially asking and probably how I should have worded my question, or a variation on it such as: "If all is correct, will a TT/TV rig stop slower or as fast (or faster) than the TV solo."



Good info to have, now I can get out and do some testing and see where I stand.
It is worth thinking about not only the stopping power, but how that changes over time (one time application, vs several applications, vs continuous applications).

I fully agree that a trailer combination should be able to stop as quickly as the TV solo, in general, but that doesn't mean it can do it on a continuous basis.

One stop, absolutely. Several stops, sure. Continuously, not necessarily.

Brakes, especially drum brakes, are not designed for continuous application. They absorb heat, but can not disperse it as fast as they can absorb it. Hence, brakes fade with continuous use. All brakes can fade, disks won't generally do it as soon as drums, but it is worth thinking about the time element IMO. Considering brake power alone is an incomplete analysis.
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Old 08-17-2018, 05:21 PM   #47
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Trying to get a trailer combo to stop fast is pointless. You need to allow following distance. If people “keep filling it” you need to keep adjusting. People will cut into a 1-1/2 car gap so there’s no point in trying to keep them from doing it.

I tested mine today, on a deserted stretch of blacktop. I locked all 8 wheels and stopped in a straight line. Perfect.
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Old 08-18-2018, 06:23 AM   #48
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Originally Posted by Countryboy59 View Post
Trying to get a trailer combo to stop fast is pointless. You need to allow following distance. If people “keep filling it” you need to keep adjusting. People will cut into a 1-1/2 car gap so there’s no point in trying to keep them from doing it.

I tested mine today, on a deserted stretch of blacktop. I locked all 8 wheels and stopped in a straight line. Perfect.


Have to disagree here.
How is trying to get a trailer to stop fast pointless? There is no situation where a longer stopping distance is desirable.

You will have a longer stopping distance with the wheels locked up than with out. Your shortest stopping distance will be when the brakes are applied to just before the wheels lock up. This is how ABS works, it keeps the wheels from locking up and maximizes braking performance while also allowing you to maintain steering control. Road racers without abs practice threshold braking extensively.
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