New TWU Customization Tool

Discussion in 'Racquets' started by TW Professor, May 27, 2008.

  1. TW Professor

    TW Professor Administrator

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    Check out the new TWU Customization Tool:

    http://twu.tennis-warehouse.com/learning_center/customization.html

    It shows you how much and where to add weight to meet your inputed requirements. Answers look like this (all depending on your input requirements):

    [​IMG][​IMG]

    Will give answers in any units desired.
    Also contains new swingweight calculator.
     
    #1
  2. TW Professor

    TW Professor Administrator

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    #2
  3. NLBwell

    NLBwell Legend

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    The TWU calculators are pretty cool. Thanks a lot.

    It would be useful to have a swingweight calculator where you could put in where you added weight to the racket and have the swingweight as an output.
     
    #3
  4. M J

    M J Rookie

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    #4
  5. NLBwell

    NLBwell Legend

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    Thank you.
     
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  6. Shangri La

    Shangri La Hall of Fame

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    wonder how accurate the sw calculation is in theory.
     
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  7. TW Professor

    TW Professor Administrator

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    The do-it-yourself swingweight is very accurate. In all tests against a commercial device, this method is comparable. Even a commercial device varies 1-2 units from measurement to measurement on the same racquet. The only theoretical restraint is to keep the swing less than 15 degrees. Even swings as small as you can barely see will work.

    In practice is where error can creep in. You have to be very accurate on your measurement to the hanging string and the timing with the stop watch. With practice you will find you can get the same elapsed time within hundredths of a second--often getting the exact same time.

    And even with any timing error, it will be probably be closer than anything you can feel the difference for.
     
    #7
  8. meowmix

    meowmix Hall of Fame

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    I was actually trying that calc last night, when i somehow came up with a swingweight of 72 for my Ipex 7.0MP. I'm still trying to figure out where I went wrong...:
    weight: 12.2ounces
    balance pt: 31.5cm
    handle to string: 64.9
    time for swings: 10.432, 10.190, 10.093
    swingweight: 72?!!!
     
    #8
  9. Shangri La

    Shangri La Hall of Fame

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    Thank you Professor : ) Gotta give it a try !
     
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  10. TW Professor

    TW Professor Administrator

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    I suspect your timing is off. However, it would have to be off by a lot--over 3 seconds! Double check the following:

    1. Count when the handle is at the top of its swing (it comes to a stop there so it easiest to see).
    2. Start the watch at the top of the swing and count #1 is after the handle has gone back and all the way forward again. Maybe you are missing a swing by starting the watch at 1.
    3. Have a mark on the floor against which to view the swings. Place the mark so that when you stand over the racquet you can adjust your line of sight so that the butt of the handle just reaches the mark at the apex of each swing (as the handle swings less, just move your line of sight slightly to realign).
    4. View swings from above.
    5. After you tap or push the handle to get the racquet swinging, let it swing a a few times so you can get its rhythm. Then you will be poised to start the watch right at the peak of the swing.

    I hope this helps.
     
    #10
  11. srvnvly

    srvnvly Professional

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    kudos, TW, for making a great site even better!
     
    #11
  12. Mansewerz

    Mansewerz Legend

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    Wait, let's say my racquet is 8 pts HL on a 27 inch frame. Each point is an eighth of an inch right? So the balance point is 12.5 inches?
     
    #12
  13. jace112

    jace112 Semi-Pro

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    On the few frames that I own the difference between the calculator and a RDC is within the 5 kg.cm² range. Pretty cool, isn't it?
     
    #13
  14. Josherer

    Josherer Professional

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    looks goooddiishhh :0
     
    #14
  15. 2nd_Serve

    2nd_Serve Professional

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    That's pretty cool. But how many inches/cm is 9 points hl?
     
    #15
  16. AlpineCadet

    AlpineCadet Hall of Fame

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    1 point is 1/8 of an inch; 8points = 1 inch.
     
    #16
  17. 2nd_Serve

    2nd_Serve Professional

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    Wait...If 1 point is an 1/8 of an inch, how did you get 12.5 inches?
     
    #17
  18. AlpineCadet

    AlpineCadet Hall of Fame

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    Well it's either because the frame is INSANELY HL, or they are measuring from the buttcap to the middle of the frame. If it's a standard length frame, then it's 27/2 - 12.5.
     
    #18
  19. Gorecki

    Gorecki G.O.A.T.

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    TW people???

    not working? server down?
     
    #19
  20. AT92292

    AT92292 Semi-Pro

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    yea hasnt been working for me either
     
    #20
  21. el sergento

    el sergento Hall of Fame

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    What specs should be plugged into the calculator; strung or unstrung specs??
     
    #21
  22. brizzle77

    brizzle77 New User

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    I'm having trouble because it says "Only numbers allowed". I dont know what I am doing wrong.

    I have a stock AeroPro Drive

    27in
    11.3oz
    SW 323

    What am I doing wrong?
     
    #22
  23. TW Professor

    TW Professor Administrator

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    You might be typing in a comma, space, period, or return in one of the fields.
    Are you putting units in after the numbers? Don't. It figures out what units you intend.
     
    #23

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