For now i am pretty sure Pete added 16g of lead to the side of his racket, as you can see here:
to me, it looks like he has two 6 inch strips and one 4 inch per half a side,so in total 64 inches, divided by 4 as every 4 inch strip of a quarter inch wide lead tape is 1 gram, so 16 grams in total.
When i plug these numbers on the twu calculator (https://twu.tennis-warehouse.com/learning_center/customizationReverse.php) using the base swingweight of 334 (might be 330, per other sources, heres mine: https://www.hdtennis.com/info/pro_racquet_specs/sampras_wilson) using the middle point of the string bed around 53cm (if divided to multiple weighting spots the results are not that different) and the width of 11cm (i dont know the exact width on his frame), the results are around 364 swingweight (close to Pete's 367, different strings and dampener affect this) and the twistweight increases by about 2 points (1.9 to be precise) as seen here:
Twu's twistweight database has the twistweight of a wilson pro staff 6.0 85 to be at 12.3 as can be seen here: but this is a reissue of the frame with different specs compared to the original (compare this: https://www.tennis-warehouse.com/Wilson_Pro_Staff_60_85/descpageRCWILSON-W26085.html and the second link) so i dont believe that the original pro staff 85 had the same twistweight, and i suspect the old one to be at a higher number, as it has a lower polarisation index, but it doesnt have to be the case. 0.461 for the new one and 0.436 for the old one using this calculator: https://impactingtennis.com/education-tools/mgr-i/
Now, Pete allegedly used a wilson k factor k pro staff 88 after his retirement, which has the twistweight of 14.5, and he added lead tape on the sides, see: https://nickspicks1.files.wordpress.com/2009/10/12.jpg but the problem is, i dont know if he had it specked up to the same specs he used with a 85. Using the same method of measuring twistweight for his 367 swingweight, it comes out with a value of 16kg*cm^2 if i put 12 grams (two 6 inch strips per half side, just a guess). But again, this doesnt mean he used a 367 swingweight on a k88.
If you own a original pro staff 85 (prefferably a St. Vincent one) would you be kind enough to share its specs (weight, balance, swingweight, twistweight) and measure the distance of the center point of your rackets stringbed and the bottom, and we distance of the inner side of the frame to the sweetspot( middle of the stringbed)? If you dont have the propper equipment to measure twistweigh try this method: https://tt.tennis-warehouse.com/index.php?threads/measure-twist-weight.554899/ and this is for swingweight: https://twu.tennis-warehouse.com/learning_center/swingweight_calc.php
When i plug these numbers on the twu calculator (https://twu.tennis-warehouse.com/learning_center/customizationReverse.php) using the base swingweight of 334 (might be 330, per other sources, heres mine: https://www.hdtennis.com/info/pro_racquet_specs/sampras_wilson) using the middle point of the string bed around 53cm (if divided to multiple weighting spots the results are not that different) and the width of 11cm (i dont know the exact width on his frame), the results are around 364 swingweight (close to Pete's 367, different strings and dampener affect this) and the twistweight increases by about 2 points (1.9 to be precise) as seen here:
Twu's twistweight database has the twistweight of a wilson pro staff 6.0 85 to be at 12.3 as can be seen here: but this is a reissue of the frame with different specs compared to the original (compare this: https://www.tennis-warehouse.com/Wilson_Pro_Staff_60_85/descpageRCWILSON-W26085.html and the second link) so i dont believe that the original pro staff 85 had the same twistweight, and i suspect the old one to be at a higher number, as it has a lower polarisation index, but it doesnt have to be the case. 0.461 for the new one and 0.436 for the old one using this calculator: https://impactingtennis.com/education-tools/mgr-i/
Now, Pete allegedly used a wilson k factor k pro staff 88 after his retirement, which has the twistweight of 14.5, and he added lead tape on the sides, see: https://nickspicks1.files.wordpress.com/2009/10/12.jpg but the problem is, i dont know if he had it specked up to the same specs he used with a 85. Using the same method of measuring twistweight for his 367 swingweight, it comes out with a value of 16kg*cm^2 if i put 12 grams (two 6 inch strips per half side, just a guess). But again, this doesnt mean he used a 367 swingweight on a k88.
If you own a original pro staff 85 (prefferably a St. Vincent one) would you be kind enough to share its specs (weight, balance, swingweight, twistweight) and measure the distance of the center point of your rackets stringbed and the bottom, and we distance of the inner side of the frame to the sweetspot( middle of the stringbed)? If you dont have the propper equipment to measure twistweigh try this method: https://tt.tennis-warehouse.com/index.php?threads/measure-twist-weight.554899/ and this is for swingweight: https://twu.tennis-warehouse.com/learning_center/swingweight_calc.php
: "correct balance is between stability and manouverability"... for him!
