2020 Trade Shows are cancelled so let DYNOmite bring them to you...

Trade Show Update


Trade Shows have been cancelled for 2020 and we are disappointed as you are. But in anticipation of this reality, we have been working hard to create a new-to-the-world virtual booth for our devoted Customers. You will hear more about this in the next weeks, but look for:

  1. Live streaming content with industry experts
  2. Demonstrations with service techs of our equipment
  3. Live chat with Sales and Service staff to discuss industry needs and innovations
  4. Watch as some of the most popular SuperFlow and DYNOMite products are being built
  5. the coolest opportunity the industry has ever experienced – YOUR chance to interact with our Innovation team to finalize versions of software and controls

DYNOmite views this year as an opportunity to engage with you in ways we haven't been able to in the past. Please visit our show page to register for additional information as it becomes available.

Torque Hysteresis

Read about reducing the water brake's plumbing hose loads to improve the dyno's repeatability.

Advanced | 07.28.20

How can I improve my absorber’s torque repeatability?

Don’t get HOSED… by that final plumbing connection between your DYNOmite absorber and its supply, drain, and vent hoses!!!! This is too easy a spot to inadvertently induce measurable torque errors! You need to carefully select each hose’s routing.

Because it’s so simple to “Zero” out minor torque offsets, even many experienced dyno operators get complacent about monitoring for errors – that hose weight and stiffness might be adding. Next time you test, take a few seconds to examine how your own lines are attached.

Press lightly (one finger) on the o.d. of the absorber housing – rotating it enough to just move the Torque reading. Then let go. If the gauges do not return, your hose routing is probably too stiff (adding torque latency and hysteresis). Try re-arranging them. Hoses that exit straight for several inches (before any bends or tie wraps) are much less prone to inducing rotational loads.

Next, open the load valve to fill up the hoses with water. Does the added weight and flow move the torque? If so, you have some more work to do. Again, avoid hose bends near the absorber that amplify the rotational leverage of the hose’s weight.

It’s often practical to replace a long drain hose with just a short hose stub – that squirts into an adjacent “catch stand” drain pipe. This trick provides a “sticktion” free junction (that can be used for the vent line as well). Just be sure that its “spray angle” is not at all tangential to the absorber’s o.d., to avoid inducing any torque reaction (from this high velocity water jet).

When things are plumbed correctly – torque readings and zeroing are more consistent, plus, inertial compensation stays in phase with measured torque. In other words, you get more accurate results…more easily!

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