Pro Swing Weight?

Discussion in 'Pros' Racquets and Gear' started by sammyboy, May 29, 2010.

  1. Chapter 24

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    No problem, I would like to be able to help through my own trials and tribulations if possible as I benefit from others' experiences. Maybe you have already run all the numbers but in case you haven't:

    (Please keep in mind that I am VERY NEW to all of this so I could be dead wrong in my logic and/or made some calculation errors).

    I ran through the all the numbers based on your post and your magic number with this set-up is around 19.35.

    I would agree that whatever challenge I face with the non GT version in getting to 21.0 or even close your challenge is much greater.

    Also, the GT is 19.6 out of the box so the mods seem to be going in the wrong direction. The non GT is about 20.3 out of the box though mine was about 4 g heavier than listed which helps a little. (Then again, at the same time we have to assume that the SW's we use are reasonably correct which could be a big assumption).
     
    #51
  2. PED

    PED Legend

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    Thanks for that, I'm going to put it on the RDC in the next few weeks to get a proper SW number.

    I tried the Rafa setup a few years back with 2.5g around the buttcap and 9g at the top of the hoop. Great setup but I like a less head heavy setup for serving and general all court play. It's always fun to try the various possibilities out there. I try to make sure that I don't go too much by the numbers though it's hard some times :)
     
    #52
  3. Chapter 24

    Chapter 24 New User

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    Cool, wish I had one of those. I noticed that the TW University had an APDGT measured at SW=316 (though this same spec is listed in most other places as SW=331) but I'm not going to bank on this because they also had the weight on a unit verified to 310 g where mine is about 324 "naked". So if I am lucky enough that my Bab SW "naked" is actually 316....

    Maybe there is enough variation at the Bab factory that you too got a lower SW APDGT Plus

    Its pretty amazing how much moving sometimes as little as a couple of grams of weight around changes the feel and the results.

    One thing I do know is that I'm now obsessed with trying to find the optimum racquet, string, grip and lead tape set-up for me.

    As an aside I would like it if someone started a thread on this MgR/I deal... why then are manufacturers making racquets that are not even close ?
     
    #53
  4. rromeo

    rromeo New User

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    First off, thanks for the reply and detailed info/suggestions. As physics and physiology are my favorite topics, your posts have always been of much interest to me.

    I am currently trying to develop a maximum serve power racquet by modifying an old Head TIS2 tweener that I think is a good candidate for customization. Base specs are: 102sqin, 18x19sp, 9.4oz, 312sw, 14.5in bal, 74flex, 27.5in (actually it's 27.25 but will lengthen it to ~27.75). So far I have added lead to the handle and head to bring the specs to: 12.1oz, 360sw, 13.25 bal, w/extra .5in to be added tonite. It is currently strung w/Excel Power 17 prob to be replaced soon w/full gut. This is just for testing, fun, and customizing experience so I really don't care how it performs anywhere except on flat serves. I realize I could prob buy a used or new racquet (Wilson Profile, Yamaha Secret, BabPDR+) that is already a bomb server but that would take most of the fun out of it for me, I'd still end up modding it somehow, and don't think it would end up w/much diff specs.

    With regard to power testing by measuring the ball height against the fence, I'm assuming you mean on the fly; if so, what if one can already easily hit the ball over the fence and against the fence/wall in a relatively straight line?? I tried hitting across all 4 courts that I play at and against/over that fence (approx 210') when courts are unoccupied but I don't think thats helpful bcs the higher the launch angle is the more backspin that gets applied and then the distance doesn't necessarily correlate to serve power anymore. Maybe I need to video the flight path or have someone else check how much arc there is, not sure about this.

    How would you modify my base TIS2 for max serve power if it was your project and not mine? (I know that's cheating and you prob won't/shouldn't answer:))

    Thanks in advance for your help/knowledge.
     
    #54
  5. travlerajm

    travlerajm Hall of Fame

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    By power testing on the fence. I mean hit a serve that lands in the service box, then notice high on the fence it hits after the bounce. A standard fence is 21 ft behind the baseline, so your bounce height can be compared on different courts.

    I think you're on the right track toward creating your evil serve monster.

    I'm about to embark on the same project (creating the ultimate serve onster) - just picked up a new O3 Red for the purpose. First step is to extend the length out at least 1/2 in. Then lead it up into the right SW neighborhood with some counterbalance too.
     
    #55
  6. travlerajm

    travlerajm Hall of Fame

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    I don't know the answer to your question, but I believe I had that same injury. I played a 3-set tournament match after not touching a racquet all summer. Then the next day, I tried to shift my car from first to 2nd, and something popped in my wrist! I think it was your typical overuse strain - it heals with a few weeks of rest. The key is ramp up slowly and don't overdo it. I'm guessing that once it's fully healed, your racquet specs won't be the problem.
     
    #56
  7. rromeo

    rromeo New User

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    Interesting, very similar specs to my TIS2 except for the RDC rating (74vs67) and string pattern.

    About the ball bounce, though, I have read that it is a very inaccurate way to determine serve speed due to the additional variables mixed in like court speed, bounce location and angle. Do you disagree and what about straight against the wall/fence??

    Ultimately I'm prob gonna need either an assistant w/a stopwatch or a radar gun, or a video camera.
     
    #57
  8. Chapter 24

    Chapter 24 New User

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    Thanks, that sounds like a reasonable assessment !!
     
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  9. Pioneer

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    Hey, I'm trying to make a serve monster out of an old cracked and repaired Head LM Fire. It's 102sq. in. but head measures it from the outside so it's more like 98sq. in. As for weight and SW I have no Idea but it's pretty close to even balance and it's 27.25 in. but I might extend it to 27.5 in.

    Please let me know how your mods go

    PS: All the mods are gonna be done with duct tape for now because all the lead is on my H19 :D
     
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  10. pennc94

    pennc94 Semi-Pro

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    Just watched Denis Kudla practice before his qualifier match at Legg Mason.

    His spare racquets (Tecnifibre T-Fight 325 Vo2Max) had stickers from his customizer:

    Mass: 332g, Bal: 31.4cm, SW: 298

    I am not sure if those are unstrung specs.
     
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  11. Pioneer

    Pioneer Professional

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    Trav, do you have the numbers for the Bryan brothers? I know they use SWs in the 360s but at the same time their racquets are supposed to be very maneuverable
     
    #61
  12. Pioneer

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    I'm guessing it's unstrung because a SW of 298 would be too low
     
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  13. PED

    PED Legend

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    Greg Raven posted these from the 09 Indian Wells so they should be accurate:

    Bryan, B.
    Prince O3 Speedport Black
    368 Static Wt
    31.6 Balance
    362 SW
    string hole inserts

    Bryan, M.
    Prince O3 Speedport Black
    365 Static Wt
    32 Balance
    369 SW
    string hole inserts
     
    #63
  14. Pioneer

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    So I get 20,4 for B Bryan and 20,2 for M Bryan
     
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  15. The Pure One

    The Pure One Rookie

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    Your calculations were made on the assumption that both play with 27" sticks or longer?
     
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  16. PED

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    I'm under the impression they both use xl sticks.
     
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  17. Chapter 24

    Chapter 24 New User

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    MgR/I = 20.24 for Babolat Pure Drive Roddick GT Plus

    Anyone here know Roddick's specs ?

    Can't be the racquet below, though to improve my odds, I'm also going to ask the same question here:

    http://tt.tennis-warehouse.com/showthread.php?t=342218

    MgR/I = 20.24 for the so-called Roddick Signature Racquet:

    Babolat Pure Drive Roddick GT Plus

    Head Size:
    100 sq. in. / 645 sq. cm.
    Length: 27.5 inches / 70 cm
    Strung Weight: 11.7oz / 332g
    Balance: 7pts Head Light
    Swingweight: 336
    Stiffness: 71
     
    #67
  18. Chapter 24

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    I really have to stop replying to my own posts :oops: - but how come I can't edit ??

    Anyways, I forgot to change the length to 27.5" from 27" in the spreadsheet so the actual MgR/I on the Babolat Pure Drive Roddick GT Plus should be 20.47 - but still a valid question IMO because I thought he would wield a heavier stick.
     
    #68
  19. PED

    PED Legend

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    A Rod's specs from Jemister(who owns his stick)

    Weight: 320 g weight unstrung
    Balance: 32.3 cm
    Swing Weight: 322 kgxcm2(unstrung)
    346g strung & 6pts HL
     
    #69
  20. Chapter 24

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    Thanks, did he measure the swingweight strung ?
     
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  21. PED

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    I don't think he ever did end up doing SW.

    On a side note, I'm thinking of trying out the A rod lead setup on my apd plus to see how it goes.....
     
    #71
  22. Chapter 24

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    Let us know please.
     
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