Pitbull TRS twisting swingarms ?

And what non-engineers and non-statisticians refer to as BS.

 

A good engineer would call it expected. Such a low incident occurrence is really really good.

If it isnt obvious, I find it fun to think about hypothetical extreme cases and HOW they might happened.

 

If I didn't do a good job expressing my thoughts, this is what I meant earlier in my post. That's the only way I see forces being large enough to tweak the swingarm.

I don't think it would be a common occurrence, but would be possible if the side to side motion of the trailer is violent enough.

The front end of the bike trying to rotate violently left to right, around the mounting point, repeatedly, would put some pretty extreme forces way at the end of the lever (i.e. bike rear axle/swing arm/mounting point) with some significant mass behind the motion.

 

Seems like any easy way to test is put the bike in the TRS and Lift the bike from the front and see if there is any side to side movement. Bike is being held at 2 points on either side of the axle, not a single point. Not an engineer and did not stay in a Holiday Inn.

 

Nothing against RCA, i’m just in the camp of chalk it up to “shit happens” and move on. Theres a lot more meaningful things to do with the time wasted doing RCA on this.

 

Is this because your swingarm is canted 10 degrees to the right to give you a CW advantage???

 

in an FMEA, the occurrence and severity rating combined would probably lead to an alternative design if the TRS were automotive parts.

 

Whats the meaning of severity rating? I dont remember that term.

 

How bad is it when the bad thing happens. Like chipping paint would be a 1 and killing someone would be a 10.

 

severity: and detection:




the total number is the multiplier of occurrence, severity and detection. all go from 1-10. you don't want a 10 anywhere, since it means you wouldn't detect it, it is surely to occur or deadly when it happens (severe) .

 

So, 8-1-6?

 

I actually really like CCW.. lol

 

The TRS didn’t “cause” the bends. If anything “caused” them, in the given hypothetical, it would be the extreme forces applied to the mass being held in place by the TRS.

 

I can see this happening in an extreme case. Especially if bouncing and swaying at same time. Would not deter me from using the TRS though. Its on the list of things to get for the trailer. The last trip my R6 took in my trailer, it bounced enough to dislodge the internal pump in my fuel pump (popped out). There is a horrible stretch of freeway from Riverside to San Diego. Those bike bounce around even without blown out tires or sway.

 

Stress designed in a specific manner though. You can probably dent most swingarms with a good blow with your fist. I mean, they totally these things out by the 100's for small crashes because they are made to be light, its just the name of the game. I'm not saying its an everyday occurrence, i've used those restraints and they were THE thing to have for sure, but I always questioned what would happen if the front of the bike really wanted to go in whatever direction it wanted to. It didnt stop me from using them for sure, but I was well aware of what could possibly happen.

 

They total these things out for cosmetics...

 

Let’s put it this way:

you drive your car buckled up and knowing there’s an airbag in place if shit went south.

You pop a tire, swerve into a wall, airbag and belt saved you. Car is wrecked though. Damn potholes.

same for the trs. It holds the bike in place properly and safely.

people haul bikes all over the place with them.

shit goes south. Trailer tire pops and the thing does a roller coaster sans the loop. Bike is still there but there might be a bruise here or there. +/-3 degree / % depending on the bike

a SHTF-Proof restraint system would run you 3x the cost of a TRS and surely more than a TPMS for your non-pressure checked china bomb trailer tires you’re hauling the thousands of $ of race stuff around with

(You as in not you personally but the general trailer public)

 

One strategically placed tie down ring in front of each bike and a loop of nylon fixes this potential issue.

 

We dont want solutions. We want debate and to argue unknowns...

 

Baxley front wheel chock with 4 straps is how I always roll . Never had a problem, never will , end of story .