It’s a fair point you make grippatank, and as I mentioned I’m not knocking what you’ve done in any way, in fact I think you are to be applauded for doing anything at all when there are plenty of suppliers out there simply ignoring the issue.
I do take issue with you calling it “crash tested” since it simply isn’t a “crash test” it’s a “crash simulation”.
Also, when I researched this issue when buying my own systems I found lots and lots of information about crash-testing generally and one thing in particular I found quite persuasive. The NCAP system for rating car safety is based on actual crash testing (not crash simulations). Among the articles I read about why this is the case when it’s so much easier (and cheaper) to do sled tests was the Crash Test Dummies.
The Crash Test Dummies are critical to seeing how safe a thing actually is, because after the crash you can examine and analyse the dummy (and it’s sensors) to see what injuries it would have suffered.
For NCAP, they determined that it would be useless to say a sled test was “successful” just because the vehicle stayed in one piece, or a certain load stayed where it was, because that does not tell you how protected the people inside were.
Your sled test shows that a grippatank system stayed where it was installed, which is great. But what happened to that energy? Was it absorbed? Or did it simply make the crash so much worse in the vans cab, that the driver was killed anyway?
The point is, you just don’t know unless you do a real crash test, and include crash dummies.
This was (in my opinion) the problem with Pure Freedoms crash test. The video is here:
https://youtu.be/SnFyMqPER3gI came very close to buying a pure freedom system the first time around, but this video (along with a few other things) is what changed my mind. As you’ll see if you watch it, the system stays in place, which is great.
But what happened inside the cab?? They don’t show you. They only show a few selected still images from the side. Why not include the whole film? That would have been the most convincing clip.
To me, answer was obvious. The damage to the cab was catastrophic, the driver would probably have been killed, and they didn’t want to show it. (And weirdly, no crash dummy?!).
I also noticed that pure freedom themselves don’t refer to their systems as “crash-tested”, which to me, says it all.
But, if they had done a sled test, it would have shown the system staying in place, (just as the grippatank one does). The point I’m making is what does that matter if the cab is also crushed so badly that the driver is killed?
To me this is a perfect example of why a “crash simulation” is not the same as a “crash test”. It’s not just about the thing staying where it is, it’s about walking away afterwards.
Again, not knocking you, you’ve done a good thing with your sled test, and well done to you for it. But it’s a crash simulation, not a crash test.