Crappy Situation!

There are a lot of conflicting reports, but it seems the driver was pulling double dump trailers and the back trailer flipped. Michigan doubles routinely have like 30 tires, so if a tire let go on the dolly, it's possible that would cause instability causing the 2nd trailer to overturn. Anybody that's pulled doubles knows, the 2nd trailer is exceptionally tippy, and that's probably what happened.

 

HOLY SHLITZ! What a mess. Glad that wasn't my VFD, whats funny is the environmental team sent out to control the spill. Think about it, in a week you'll be buy back your turds for fertilizer and composte

 

[QUOTE="semi" retired;4182846]There are a lot of conflicting reports, but it seems the driver was pulling double dump trailers and the back trailer flipped. Michigan doubles routinely have like 30 tires, so if a tire let go on the dolly, it's possible that would cause instability causing the 2nd trailer to overturn. Anybody that's pulled doubles knows, the 2nd trailer is exceptionally tippy, and that's probably what happened.[/QUOTE]

This particular video is of a steer blowout on a straight truck. From explosive blowout to death was seconds:

https://www.youtube.com/watch?v=g1DTU2w4r7Y

There are a number of Youtube videos showing "truck tire blowout".

Pretrips are your friend. I upgraded my tire pressure gauge to one with the dial for more accuracy. Likely saved my bacon a couple of weeks ago.

During our pre trip I was teaching my student the importance of actually gauging, rather than just thumping tires. We were also comparing pressure readings on the old slide gauge versus the new dial gauge.

On one set of tires on the trailer we hooked to, the thump around sounded good to both myself and my student. Then we gauged with the old slide gauge and it seemed like a couple of them were reading about 85 psi. The dial gauge showed one was 75 psi and the other was 72 psi. It was a good lesson for both of us, and a chance to show him how to inflate the tires with the 40' hose. We watched those pressures carefully at every stop for the next three days, but after inflating them properly they held all the way. Somewhere along the line somebody failed to properly pre trip that trailer.

 

As someone who has used PSI gauges several times a day for more than two decades, I have to ask how you "know" that the dial gauge is more accurate than your slide gauge, a dial does not make it inherently more accurate, each is only as good as the parts and calibration put into it. Whenever I brought into question the accuracy of a gauge, I would gather several from around the shop and compare readings against the same exact source, toss the high and low then average, my tolerance was 2 PSI.

Dials are more susceptible to suffering from drops/bangs/vibration/dents, etc., Slides from spring fatigue, dirt/dust/grime (which is why I kept mine clean).

I applaud your demonstration to your student and impressing upon him the importance of it, but I think that your example of a single instrument vs. a single instrument is a poor comparison, but the exercise is an excellent one.

 

You make an excellent point that my exercise didn't rise to the level of an experiment, the sample size was too small. Frankly, I think the slide gauge might have been subjected to spilled soda pop, courtesy of my student. Dried Coca Cola doesn't make a good lubricant.

One thing I should point out for anyone doing drop and hooks is that we seem to often get mismatched sets of tires, as was the case with my episode. Trying to get a sense that all inflation on a set is the same based on tone isn't reliable if all the tires are different makes and models.

 

Really disgusting people in my book. Nobody even washed their hands in the video.

 

Re: Alaska76, a quality pressure gauge will have a Bourdon Tube and the sliders have no springs but are notoriously inaccurate.


Dude should have crashed a week or two ago when they have the World's Longest Yard Sale along Hwy 127.

 

That line painting truck that rolled over is a very sad video. I don't know what contributing factors were there besides the blow out. BUT, if there wasn't a proper grip on the steering wheel when the tire blew, all it takes is a split second for the wheel to spin around to the locks and INSTANT roll over.

 

Just saying.

 

At least if the driver crapped his pants, no one would know.