Prince TT100P swingweight? Calculation tool musings.

ChanterRacquet

Professional
Anyone have a measurement of their TT100P (2019) swingweight?

I have reason to believe the 324 reported on the TW site is high.

Thought process, chronology:

1) I have played with a Pure Strike (PS) 18x20 3gen for a year. TW lists swingweight as 334. I bought a Blade 18x20 v7 because TW lists swingweight as the same 334 and the blade has a lower RA and I'm after a more arm friendly racquet. However, turns out my PS swingweight isn't 334, but 325.

Swingweight of my PS = 324.8 +\1 1.1

Swingweight of my Blade = 335.8 +/- 1.1

I can feel how much heavier the blade is to swing. It is most noticeable on serve, but in general the PS is much more maneuverable. Oops, lesson learned. Anyone want a blade 18x20 v7 (or a Prince P100P with swingweight 329.8 +/- 5.0 (TW = 328))? I'm also looking for something more maneuverable so both those purchases made before I started measuring swingweights don't qualify on the more maneuverable part. I started measuring swingweights BECAUSE my arm told me things that didn't gel with the numbers posted by TW. Both don't hurt my elbow like my PS, but they are both less maneuverable.

2) I have been looking for a more arm friendly AND even more maneuverable racquet than my PS (At 5'11", 145 lbs I am more of a long distance runner than a weight lifter, despite my efforts). Possible solutions = blade 104 v7 (RA 60, 16x19) OR Prince TT100P (RA 66, 18x20 / older 2015 model RA 62). Dunlop CX 200 OS and Prince P100X (290) also in the mix.

About the blade 104 since we already have one in the house:

blade 104 TW swingweight = 321 (306 g, 32.99 cm)

blade 104 My swingweight = 311.8 +/- 2.4 (306 g, 32.8 cm - wife's racquet)

I just broke the strings on our blade 104 and so was going to use the TW swingweight tool to get an unstrung swingweight. However, hanging the racquet from the frame (since there are no strings) doesn't seem to work as I keep getting swingweights around 180. So I had to come up with a way to calculate unstrung swingweight. So I used the racquet customizer tool instead:


So 27.5" = 69.85 cm, unstrung is 292 g at 31.9 cm, strung was 306 g at 32.8 cm (16 gauge dynawire at 14 g, a full set is 18.5 g). Entering just those specs gives you a "one location solution" that puts the 14 g difference at 49 cm from the butt and adds 21 kgcm^2 to the swingweight, which would make my unstrung swingweight 290.8 by difference. The center point of the blade 104 hoop (approximating this as the center of the strings' mass) is 51.75 cm which correlates very closely to the "one location solution" adding mass at 49 cm. The "two location solution" is useless because it suggests I add mass at the handle but the only difference for my racquet is the weight of the strings.

3) I have demoed the Prince TT100P. I liked it a lot and it was easier to swing than my PS, serving was so easy with the TT100P it was stupid. That it was easier to swing doesn't make any sense if it and my PS both have a swingweight of 324/325. I regrettably wasn't into measuring swingweight at the time of the TT100P demo. So, having just learned that I can calculate a swingweight for the TT100P using the same customizer tool linked above that I used to figure out the blade's unstrung swingweight:

The unstrung specs from Prince:
https://www.princetennis.com/txt2-tour-100p = 305 g, 31.0 cm, 68.6 cm, 290 swingweight

The strung specs from TW:
https://www.tennis-warehouse.com/Prince_Textreme_Tour_100P/descpageRCTWABG-PTT1P.html = 326 g, 32.98 cm, 324, swingweight

Entering all those values you only get a "partial success" from the algorithm. The "one location solution" puts the 21 g difference at 51 cm up (presumably in the center of the hoop) but the balance ends up being 32.29 cm, not 32.98 cm as in TW's spec. Removing the 290 and 324 swingweights from the calculator results in a solution adding the 21 g at 60 cm which is well removed from the center of the hoop and adds 52 kgcm^2 to the swingweight which would be 290+52 = 242 which makes no sense. So either the TW balance is off or the mass difference between strung and unstrung is wrong. Prince's specs are only nominal unstrung specs, I understand that. But I also know my demo of the TT100P was easier to swing than my PS which isn't explained by them having the same swingweight. The TT100P must be lower than 324. 21 g of string seems like a lot to me considering a full set of 16 dynawire is only 18.5 g and it only took 14 g of that to string a 104 16x29 (but I am still new at this so that's my only data point weight of strings). Unfortunately, lowering the strings' weight results in no possible solutions given the 32.98 cm balance, as could be predicted from earlier results. So what is the result of adding, say, 15 g of string centered at 50 cm? (roundish numbers for strings' weight and center of mass)

So...I run over to the customization worksheet:

Input Prince's specs and adding 15g at 50 cm length, 0 cm width and I get a balance of 31.89 cm, and a swingweight of 314. Now this makes sense to me based on how it felt to swing the TT100P!

However, there were odd things about this TT100P demo from TW. The grip said L3, but I measured it at L2. My Phantom's L3 grip is L3. Anyways, I can't help but think the TW demo I got was an under spec outlier.

So...what are your strung Prince TT100P swingweights? If the consensus is the TT100P swingweight is sub-320, then it stays on the list of potential racquets to switch to. But if it's 320+, it's out. Thank you!

PS I bought a Dunlop CX 200 OS to demo, so just have the 100X (290) left to try as well.
 
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Strings add 25-35 points of swingweight depending on their type and weight. The maths look all right, but if your unstrung swingweight is 290, then your strung swingweight would be between 315-325. You can also use a thinner gauge string to reduce the swingweight .
 
I generally find prince's grips size to run a little small. As said above, strings add about 30points in swingweight. Your pure strike could have just been poor qc, as I've had multiple accounts of lower or higher than usual swingweight. Honestly you might be better off buying a lite racket and adding weight till your preferred spec. Strangely seems like wilson did a decent job with qc on your blade lol.
 
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Strings add 25-35 points of swingweight depending on their type and weight. The maths look all right, but if your unstrung swingweight is 290, then your strung swingweight would be between 315-325. You can also use a thinner gauge string to reduce the swingweight .
After stringing my Fischer MPro No.1 105, 295gr (black/green/red) + overgrip, its weight was 309gr. Adding another overgrip + 4gr silicone at buttcap + dampener, now the total weight is 323 gr, balance of 32.3 cm (6 pt HL). To calculate its swingweight, I used this website to https://www.stringwaynederland.nl/SW-TA-online/SwingCalc/index-en.php and it gave me SW of 305 (using TWU method I got 304, old TW website showed SW of 308). Does TW website show SW of strung or unstrung racket?
 
After stringing my Fischer MPro No.1 105, 295gr (black/green/red) + overgrip, its weight was 309gr. Adding another overgrip + 4gr silicone at buttcap + dampener, now the total weight is 323 gr, balance of 32.3 cm (6 pt HL). To calculate its swingweight, I used this website to https://www.stringwaynederland.nl/SW-TA-online/SwingCalc/index-en.php and it gave me SW of 305 (using TWU method I got 304, old TW website showed SW of 308). Does TW website show SW of strung or unstrung racket?
TW shows the strung SW as far as I know.
 
Pay Tennis Warehouse the extra $10-$20 and do the custom order and they will handpick for you. Ask for a frame with less than 320SW. They will probably give you a few options.

Wilson has ****ty quality control so cant trust their specs to be consistent. Prince seems to be much betters. I got 3 Phantom 100s at difference times and the variation has been within 2g total.

Maybe I got lucky but will never take this risk again. Its a difference between a great racket and a ****ty one.
 
I have a worm type of rubber dampener (4 gram) put at the lowest of cross string nearby handle. If I moved it to the highest of cross string, will it increase racket SW?
 
Well, my 2015 tt100p are not much more than 320. Actually added three grams total split between 3&9 on two of them, one also has 1.5g at the throat. One is stock. Except all of them have like 10g of blutack inside. The one that is heaviest feels/swings more like a Blade 98v7 or latest Rad pro, though that it is from memory only have not compared them and would add blutack to make them HL.
 
I have a worm type of rubber dampener (4 gram) put at the lowest of cross string nearby handle. If I moved it to the highest of cross string, will it increase racket SW?

Yes but it is illegal in tennis matches. Maybe a good experiment to try without putting any tape if you like the extra 2.5-4 grams that high.
 
From TWU customization worksheet, adding 5gr at 63.5 cm should increase SW from 305 to 319. However, why didn't I notice any much difference in power or plow-trough?
 
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