RodMaker Volume 19 Issue #5 will mail on October 1st. Most subscribers will receive it around the middle to end of that month.

 

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4 Comments

  1. Jim Spooner on November 2, 2016 at 9:41 am

    In reference to the article EFFECTS OF BLANK TRIMMING (page 14), the diagram on page 15 states that “overall blank power remains the same”.

    If the tip power is increased, which it does, the overall power also increases.

  2. Tom on November 2, 2016 at 11:18 am

    No, it remains the same. If the maximum deadlift power of a blank is say, 20 pounds, trimming the tip will not increase that amount. The blank will still have a maximum deadlift capacity of 20 pounds.

  3. Jim Spooner on November 2, 2016 at 9:11 pm

    Can’t argue with that, but since “power” is generally thought of as a CCS (or RDA) value, the use of “dead lift” seems misleading or inapplicable in this context….especially since it isn’t mentioned in the article. The CCS/RDA power rating would be increased.

  4. Tom on November 3, 2016 at 9:57 am

    Actually the CCS ERN number isn’t going to change as you think it would. Remember, as you shorten the blank the distance it has to be deflected is also reduced so you don’t end up with much of a change in the ERN after all. Power is really a function of the lower 3rd of a rod blank. Trimming the tip doesn’t really affect that aspect of things. Under load the tip simply flattens out and releases the load to the lower portion of the blank. You could do some measurements and see how the ERN is affected.

    I would agree the author might have chosen better terminology instead of “overall power” to something like maximum power or deadlift capability.

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