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Maybe. The contact time is probably too low. If the rubber is always below optimal temperature and the mu increases rapidly with temperature, then the quick ramp might give a momentary real increase in friction, but it'd need to rise enough in temp. Would not be very difficult to just calculate...

I have a hypothesis that flash heating at the contact patch also matters a lot, with the typical trend of higher friction rubbers being more sensitive to thermals. So you might not be able to really evaluate performance without sufficient heating ie: strong enough stroke. Do you know if that is...

I don't worry about it too much because no matter what you do, the rubber will harden and the wood will degrade from temperature and moisture effects. I just cover the rubber with something so that at least it doesn't catch dust before the next session. Maybe a rinse with water once in a while...

Finding out differences like this is one of my motivations for doing simulations, particularly on the hobby side for things that aren't "useful professionally". There's a lot of myths you can dispel and the community usually becomes a little more educated from it. Like you said it's easy to...

You're right, my mistake. Would holding the sheet on with psychic telekinesis count as "other"?

I feel like it'd be "easy" compared to simulating some other things, but making testing rigs is difficult, and it won't be free. There's almost no framework for it, so you'd need to do a lot of the work yourself. Probably also we will find out what we already know. :) I think correlation would...

I don't know where the idea that boosting specifically is illegal has come from. I re-read all the rules a while ago and could not find anything that's precise enough. The closest is: "2.4.7 The racket covering shall be used without any physical, chemical or other treatment." If one was to...

This is where a simulation would be very useful, because you could solve for some material properties by changing parameters to correlate the model to empirical measurements. Even amateurs could develop some okay understanding that way without spending millions on testing. The real problem is...

Not playing with the professional rubber is the only thing stopping you from going pro. If someone tells you that they're the same as the commercial versions and just from a better QC batch, they're clearly just tying to stop you from being pro like Ma Long and Zhang Jike, or whoever is cool...

The real technological and pay-to-win advantage is having access to quality trainers and practice partners that you can train with all day, the best sports psychologists and doctors to manage your mental and physical condition, and the best physical trainers to etc. I can't help but feel like a...

You're probably right, but I'm not suggesting everyone has to do this or that customers need to expect this. It's more just a thing that would be interesting from an educational standpoint, especially to perform on commercially available blades. Someone else should probably be doing the...

Clamp one end and use a dyno to deflect the other end. If you just measure the properties of the plies individually, you could make a FEA simulation and learn more from it, but of course that'd require knowledge about a lot of other elements. Intention isn't to measure game-like or human hand...

Instead of only the natural frequency, wouldn't it be useful to also produce deflection stiffness amounts at the handle middle and tip? With the handle fixed and the head being deflected in shear. That will probably give a more true idea of the spring properties of the blade.

I bought a Stratus Power Wood when getting back into the sport because I figured an OFF- is just fine coming from an ALL+, but I'm not so sure anymore. It was about 6 years of not playing at the time, 8 now. Impressions from the last session was it's very bouncy for a wood blade. It measures...

I agree. You would probably need to feed yourself a similar ball and stand in the same spot. This video is from a while ago, and to me it seems like the game has changed since then. With that in mind, physics doesn't really change year after year, so there's a lot of similarities, especially...

I suggest looking at slow-motion video of people who most likely have a kinematically correct swing and taking notes and comparing freeze frames of both of you. Although my swings were never good, it's the way I developed some resemblance of kinematically correct swings without coaching, so...

The wood only, right? I'm curious with the rubber as well. Also how nonlinear the rubber is. For me, compressing by hand, sponges and rubber seem nonlinear, and quite stiff from the first deflection. Has anyone done FEA or dynod the sponges?

I think level matters. If you can't do and have never done what you suggest yourself, advice can miss the mark. In this case I will only talk about what I have done. Either way it might be wrong. Personally I advanced from slightly bent knees to crouching lower then standing back up. Perhaps...

Very cool thread, I love the addition of the frequency response graphs. The rubber and sponge will act as a spring in series with the blade, so I wonder what the effective frequency will end up being. Due to the hysteretic nature, it will probably change, becoming higher with more deflection...

Your level is much higher than mine, so take it with a grain of salt, but to me it appears like you're using almost no body or legs at all. I'm not saying that's wrong, just that I noticed it. I had major difficulties looping backspin and even fairly dead balls on the backhand without pushing a...