Video – Testing Twin Torsion Axles
Time to look at the action by Testing The Twin Trailing Torsion Axles. A video is a great way to see what’s really happening with the new design! Especially when we can slow it down or freeze the frames.
First, Some Background
At Mechanical Elements we are always fiddling with new ideas. This time, we decided to build a whole trailer around several new ideas like the Folding Tongue and this new suspension. (More to come.) In the process, we also posted about Building Trailer Frames and the Economics of DIY Project — especially when adding creative bits.
With that background in mind, a deeper look at the suspension design (and the motivations for building it) are in this article about Tandem Torsions. You are now the beneficiary of the design, fabrication and testing that went into this trailer suspension prototype.
Let’s Watch The Video.
Portions of this testing are rather sevier as we don’t normally try to hit curbs with our trailers. Yet, as you watch, the frame bounce is not that harsh considering the size of the step. That’s the beauty of the new suspension.
The second thing of note is how active the rocker beam is on the tiny bumps, and how the frame stays so still. Admittedly, some of the video effect is due to the camera mounting, but not all. The camera is mounted, sort of, to the frame, but it is only held by duct tape, so it does move a little. If the frame was jarring, you’d see that in the video.
After testing the first time with the axles attached with clamps (see the early test video), this new video now shows much more detail. The GoPro is a much better camera for this kind of work — not to mention the point of view.
Twin Torsion Axles Update
Interestingly, since this video the bed material was installed, and we’ve taken a few good trips. In the process we found when the trailer is more loaded, the torsion axles absorb more of the impact. Yeah, it stands to reason, but it’s worth noting anyway. Oh, and the rear wheel doesn’t hang up in the air when the trailer has a load.
As with most trailers, tire pressure makes a big difference in ride quality too. Tires in the above video are full pressure (bouncy) to demonstrate damping effects of the rocker beam suspension. For our trip, we experimented with several pressures and found that there is a sweet spot that takes away much of the trailer bounce and jostle.
The big takeaway from all our trailer test drives is the smoothness in how it handles large and small bumps. That’s the goal of the suspension, so this is definitely pleasing. For a lot more info about this trailer and the test features, check out the background links above, and The Mechanic’s Post where everything is listed.