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Old 05-24-2005, 09:30 PM   #15
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1977 27' Overlander
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Andy,

Thanks - found it. Now I see why I missed it. I searched using the term "actibrake". If I had used the term "actuator" I would have found it right away.

tk
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Old 05-24-2005, 10:06 PM   #16
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1977 Argosy Minuet 6.0 Metre
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Ok

I know I'll get flamed for this but, what is with the delay time for actuation for disc brakes?
I have been told by people on this forum that disc brakes are the only way to go. I say, I'm not so sure about that.

Let's do a little fancy foot work.
If your speed is 65MPH you are traveling at 95.3 feet per second.
If your brakes take 0.7 seconds to actuate then you have gone 66.71 feet.
You have just traveled about 2 times the length of your rig before the trailer brakes are fully available to help you stop.

Is this a good thing, appearently the manufacturers have be able to sell the idea.
Will there be a instance when these brakes will fail you when you need them?
Sounds like they are not there the instant you need them.

I like the old brakes, they work the instant you apply them.
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Old 05-24-2005, 10:27 PM   #17
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1977 27' Overlander
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AAhhh,

You forgot to integrate the amount of deceleration (or negative acceleration) into your equation. The vehicle & TT are in the process of stopping by the braking action of the car and the increasing braking action of the TT while waiting for the brakes to come up to pressure.

Also, that response time is from zero to full brake pressure. Actual total response time to proportionally apply the brakes will depend on how much brake you apply and the response characteristics of your brake controller and actuator.
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Old 05-25-2005, 10:00 AM   #18
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The automotive industry certainly has far more resources at it's finger tips than any RV manufacturer.

If disc brakes were not superior, why have so many auto manufacturers gone to them?

The bottom line is that they are very superior, especially to electric brakes.

If you consider how many things can go wrong with electric brakes over the disc brakes, the disc brake systems will win that argument , hands down, every time.

Then when you consider the cost of repairs, again the discs win, every time.

Anything that's made by man, can fail. It's the failure rate that becomes the key. Disc brakes, simply because of fewer parts, have a far less failure rate than electric brakes.

Finished diamonds can crack. And the kids we men make? Another story.

The key words are "proper and routine care", just like we do for kids. That does not gaurantee zero failure, but it does reduce the probability.

Andy
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