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Old 05-05-2015, 04:43 PM   #15
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Originally Posted by Mwoodofd View Post
Thanks everyone, Ralph, I have the InvisiBrake system installed on the Jeep and I have to believe it helped do it's part in the stop.
The physics of stopping are such that if you take two identical Motor homes,Identically loaded, and towing identical Jeeps,, ONE WITH aux brakes,, One without

And beside them you put oh, say the family grocery getter mini-van, Station wagon,, Juniors sports car and such

on a properly prepared road (All lanes have the same coificient of friction)

Run 'em all up to oh say 60 MPR and at exactly the same point stand on the brakes (NOTE, it is possible to do this on a test track and it has been done)

When they stop skidding... One vehicle will be way out in front of the others.. The one without aux brakes

(IN this case the one that ran off the road) The rest

Should still be side by side.

BIGGER means you have more mass to stop, but it also means you have more weight pressing down on more surface area so when you factor it all out you get (This is for the reference road used in the above test.

Skid distance = 5.5*(Square(Speed/10))

10 MPH 10/10 = 1 1 squared =1 5.5 feet
20 MPH 20/10 = 2 2 squared =4 4*5.5=22
40 mph 88
60 mph 198

Only your speed matters.

But without brakes on the towed.. Mass is far greater than the stopping force so that 198 can easily become 250 feet.

(Source on the last figure US gear which is a bied source since they sell braking systems)
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Old 05-06-2015, 09:28 AM   #16
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Originally Posted by Mr_D View Post
We looked at a couple rigs with VORAD but it's about the only option we don't have.
I really wasn't looking for it specifically, it just so happened that mine has this option. After driving it and learning how to make use of it, I really really like it! Especially after rear-ending a jeep in front of me last fall with my car at around 35 MPH when it was really foggy, causing to total my MB S350 car. Although my car had the adaptive cruise control but obviously at 35 MPH driving in town I wasn't using it. We were very fortunate that no one was hurt.
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Old 05-06-2015, 09:38 AM   #17
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We looked at a couple rigs with VORAD but it's about the only option we don't have.

Where can you purchase VORAD aftermarket?
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Old 05-06-2015, 09:54 AM   #18
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For a time, VOLRAD was taken out of the motorhome market. Don't know the current policy. It was about a $10k option when it was available & a retrofit would be more costly.


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Old 05-08-2015, 11:25 AM   #19
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For a time, VOLRAD was taken out of the motorhome market. Don't know the current policy. It was about a $10k option when it was available & a retrofit would be more costly.


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On my 08 Affinity it was an $8,155 option. I know VORAD as an option is still available on the Newmars (KindAire, Essex). I wonder if this can added on as an after market to Newmar coaches - one can find out by calling Newmar.
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