The TWU numbers on twistweight are very unreliable imo.
in that they measured incorrectly or in that there is a lot of variation within the same model?
Both somewhat but more the second one. Especially in older models the TW varies a lot.
Interesting. I had read somewhere here that twistweight doesn't vary that much and just trusted that it was true, but perhaps it isn't. Curious TT members who demo a lot and have a briffidi(unfortunately I am not one of them) should make a twistweight thread and post data.Both somewhat but more the second one. Especially in older models the TW varies a lot.
In many racquets I measured the numbers didn't match the TWU numbers.
The newer models are somewhat in the same ballpark usually but they also vary.
Measuring TW is very error-prone and I don't know how they do it and how many racquets they measure for their numbers.
And of course my numbers could be wrong or the racquet I measure is an outlier etc.
Like @veelium said, TW could be extremely off from TWU, but within the same racquet family, TW is almost always linear. Meaning that if SW is higher, TW will almost always higher. For instance, TWU reported a higher TW with the pure aero 98 racquets, but they came at a higher average sw than the Pure Aero VS. When I found a pure aero vs with the same SW, the TW numbers were identical. In my case the numbers have always been linear, but I say “almost always higher” just in case someone is able to prove it wrong.
because the 98 and vs are not the same racquet, and therefore likely have different amounts of graphite in different places, it is difficult to infer much from their relationship to each other. have you measured two of the same frames (not just the same family) with similar setups and found twistweights that were extremely off from twu specs or from each other?
Sorry I think I worded my answer poorly. What I was saying was when I found a pure aero vs with a SW of 325 strung, and a pure aero 98 with a SW of 325 strung, their twistweight numbers were exactly the same. Both are off from TWU numbers. The only racquet I have ever measured that has similar twistweight to what is listed on TWU is the RF97 autograph black version. The TW is very close to 14 altough all of mine are a little higher, around 14.2. TWU is almost always off by greater than 1 TW point.
thank you for the clarification! just to make sure, is twistweight being measured with strings on? if so, what strings are you using? finally, can i assume no lead tape was applied? Also, what are you using to measure twistweight?
