Recent content by Irvin

  1. Irvin

    O3 Tour 2019 Boomerang tool 3d printing

    A big problem with a 50/50 pattern is you need to string 2 crosses toward the top then 2 toward the bottom and keep repeating until you finish the top. If you have fixed clamp dedicated to one side you need three fixed clamps or two and a flying clamp.
  2. Irvin

    O3 Tour 2019 Boomerang tool 3d printing

    Yes the string will bend but on the next pull I try to release the base of the clamp and straighten the string while tension is pulling. I agree you don't get real close to the frame but I doubt anyone could tell the difference.
  3. Irvin

    O3 Tour 2019 Boomerang tool 3d printing

    Sounds like you were putting the peg on the cross and not the main or you have extremely small clothes pegs in the UK.
  4. Irvin

    Stringing natural gut...

    @graycrait if your tips are unraveling you must be push weaving and not pull weaving. I try to pull weave when stringing gut in crosses so it does not unravel so much.
  5. Irvin

    O3 Tour 2019 Boomerang tool 3d printing

    Were you putting the clothes peg on the outside main?
  6. Irvin

    Reasonable swingweight?

    @wings56 measure your rackets using a cross string 3 strings off from where you measured them first and see what your SWs are. You may also want to video your racket swings and use an editor to determines your period. Timing the period with a stop watch is a waste of time. EDIT: BTW if you make...
  7. Irvin

    Stringing natural gut...

    I would not use a stop knot without tying it around the anchor string that would put all the pressure of the stop knot on the grommet. Check out Richard Parnell’s video on his Parnell Loop below. Looping the string around the anchor string before tying you starting knot will take pressure off...
  8. Irvin

    Effect of balance point on SW

    Why accept anything that will not be exact? As you surmised adding 10 g at the balance point will not change the balance and raise SW and RW by 5.5 points. Now all that is left is to spread the weight out evenly (5 g above and below) to increase RW & SW by 10.5 points (I = mr^2 or r =...
  9. Irvin

    Effect of balance point on SW

    Now I see the problem the solution to get you SW to 354 given by the TWU tool is in inches not cm. All your other measurements were in cm and grams. EDIT: Also the 2 point solution puts 6.5 g 9.44" above the balance point and 3.5 g 11.96" below the balance point. You will not maintain the same...
  10. Irvin

    Effect of balance point on SW

    No the problem is you do not realize I did not give you the formula for the inertia of a physical pendulum. If you used some other formula other than the one I did not give you (like one of the formulas I did give you used for something else) there is a pretty good reason you would not come up...
  11. Irvin

    Starting machine

    Deleted
  12. Irvin

    Effect of balance point on SW

    @wings56 look at it this was SW = RW + md^2 you’re going to need to increase mass from 330 g to 340 g and your balance will remain at 33.45. So the mass alone give you and increase of ((23.45*23.45*.340)-(23.45*23.45*.330)) 5.5 points. So you need to place 5 g of mass above and below (total of...
  13. Irvin

    Effect of balance point on SW

    Something isn’t right. You can’t increase SW by 16 points by adding 10 g of mass below a balance point of 33.45. The higher up the racket the great the SW increase. If you added 10 g at 33.45 cm your SW goes up 5.5 points and balance does not change. You can get the SW up by 16 points adding 10...
  14. Irvin

    Correlation of wrist awareness and racquet polarization

    True so?
  15. Irvin

    Wise 2086 won't release string

    A call may work better
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