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What angle to scrape the tow hooks? Funny story involved.

Calmdown

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There was an incident where a cable-net vehicle barrier came up under my Ranger, and I'm trying to figure out how high up the ass of the truck was.

True story. Some places have these security devices to stop traffic and prevent people from coming or going. A few of these places have multiples of these allowing for different entrances from different roads. Think something like the image below.

Barrier.jpg


Anywho, to make a story as long as it needs to be; there was an incident where someone set this sucker off, and the audible warning system wasn't working. And the barrier wasn't tied to the street lights. So when the light went green, I went. And the barrier came up under my truck.

Here's where it gets good: The trucks inertia made it completely over the barrier. Also good, but not so good, but still pretty awesome in a "hey this shit works like it's supposed to" way...

The barrier was strong enough to lift my truck... pretty frickin high in the air. I was in the truck and working on getting a video of it if it exists, so what happened next is me piecing together shit based on dead reckoning and how much I didn't have to replace on the truck compared to how expensive it would have been had it happened a different way.

Phase 1. Front end of truck over barrier, barrier starts to come up. Lifts front end of truck up while inertia pushes the front tires up and over barrier. Bounce 1.
Phase 2. Truck "lands" frame to barrier, roughly middle of drivers door distance, and bounces again. Bounce 2.
Phase 3. Truck "lands" past center of gravity and slides on the frame down the barrier until it reaches rear wheels.
Phase 4. Rear tires contact barrier and drive up and over it. Barrier most likely fully extended at this point.
Phase 5. Truck clears the barrier with the rest of the bed (like no scratches or scrapes or anything), and drops to the ground.

Aftermath:
The barrier decided it wanted my muffler as a trophy, and the truck was like "no" so they compromised by stretching out my flex pipe a good 8-10 inches, and sheered a nylon bung next to the transmission.
Truck drives straight, even with "jesus take the wheel" tests, no pulling on acceleration, decel, braking, or hard launches. No noise when I compress the suspension at speed. No mudflap damage, no hits on the spare tire, hitch receptacle untouched, etc...
I was eating a breakfast sandwich and it got launched into the windshield cheese first, so had to have that cleaned.

I'm going to get the frame dimensionally measured by Ford, as well as a 4 wheel alignment when I take the truck in for an oil change and some warranty (unrelated) work, but other than those items, and the tow hooks being scraped up, there seems to be absolutely nothing wrong with this truck.

Which, of course brings us to the question: Does anyone know how high up the rear of the truck needs to be in order for the tow hooks to scrape the ground?
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CO2Ranger

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I'll start! Holy shit!
 

TN Ranger

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Man that's awesome and scary at same time. Glad the Ranger wasn't hurt. But DAMN. That would be some crazy feeling haha
 

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With a stationary vehicle, you would need the rear axle over 6 feet to get the front tow hooks to touch.

A vehicle mid bounce would have eaten up allot of suspension travel and lessened that height substantially, but between the bounce and torquing up the net, you may have been higher than that also.

The right thing to do, is to set up some cameras and re-create it for us.
 


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Calmdown

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Tell the truth. When did you think about posting this here? I put it between bumps 4 and 5.
Years ago I hit a deer on my MC and slid down the road. I wasn't done sliding before I started thinking to myself, "They're going love this."
Ha, I wasn't going to share it with anyone until I saw the scrapes on the tow hooks, and was like "how in the hell... how high was this frickin thing to do that!?".

At least not until/unless I could get a video of it. Then I'd planned more of a "here's how tough a ranger is" post rather than a question that involves a sliderule.

While it was happening, the only thing I was thinking was "this is NOT the market conditions for me to be buying a new truck..."
 

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Ha, I wasn't going to share it with anyone until I saw the scrapes on the tow hooks, and was like "how in the hell... how high was this frickin thing to do that!?".

At least not until/unless I could get a video of it. Then I'd planned more of a "here's how tough a ranger is" post rather than a question that involves a sliderule.

While it was happening, the only thing I was thinking was "this is NOT the market conditions for me to be buying a new truck..."
The video will go viral.
 

HenryMac

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I absolutely love your attitude about this. Well played.

Does anyone know how high up the rear of the truck needs to be in order for the tow hooks to scrape the ground?
210.8" overall length, and 30 degrees means the rear will be 105" +/- off the ground.. from the ground to the rear bumper. :like:

006 Scrape Tow Hooks.jpg
 
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Dahveed

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So I'll ask what everyone is wondering: how much money are you getting out of your city due to this incident?
 
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Calmdown

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So I'll ask what everyone is wondering: how much money are you getting out of your city due to this incident?
Well, the police didn't issue a citation, and specifically included that the audible alarm did not go off. I have to collect the report, then engage with some folks to "make it right". And that's really all I want out of it. Make everything whole again, and maybe consider tying the barrier setup to the traffic lights so it doesn't happen to the next guy who may not be so lucky as to be driving a stiff framed vehicle.
 
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Calmdown

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Does video of said event exist? Or are you looking to re-create? You could sell tickets if you are recreating ?
I will be asking if there is a video of the incident when I collect the report. If so, I will ask for it. If refused, I have other venues to go through to get it.
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