Recent content by dr_dave

Good post. That's what DAM is all about ... having a consistent and purposeful pre-shot routine that allows the visualization part of your brain learn how to aim naturally over time. There are some other elements of DAM that also help. That's why I stress DAM both at the beginning and end of...

Correct; although, lateral shaft stiffness also has slight direct and indirect effects per the info and explanations here: shaft endmass and stiffness effects This video discusses other advantages of CF shafts: The CF fiber shaft resource page has more info, including this list:

Good post. For those interested, I cover this stuff and more here: I also summarize all the advantages and disadvantages of LD shafts here: LD shaft resource page

All the math and physics is here: https://drdavepoolinfo.com/technical_proofs/new/TP_A-12.pdf The "mass moment of inertia" of a pool ball (which is a sphere) is 2/5 mR^2

Well stated. I agree 100%. That's why I encouraged DAM so much at both the beginning and end of the video. See:

That's not true. See the diagram in the video and on the contact-point-to-contact-point resource page. The line through the required contact point on the CB is parallel to the OB line to the pocket. Therefore, the line through the center of the CB and the CB contact point can't possible point...

If you want to see more video-editing pool magic, check out: If you want to see more stuff dealing with OB swerve, see: OB swerve resource page

See the info and links in the previous post.

The lateral stiffness (related to "whippiness") of the shaft affects the length of the shaft that contributes to "endmass." I lot of physics happens during that 1ms. For more info, see: what causes squirt? endmass and stiffness

Yes, assuming the tip/ferrule weight and weight distribution along the length is similar in the comparison, and assuming the CF shaft isn’t made to be whipper than normal. The mass closest to the tip contributes the most to “endmass.”

Shaft stiffness definitely affects the effective endmass (and amount of CB deflection) per the info and explanations here: shaft endmass and stiffness effects CF shafts can have radically different stiffnesses and endmasses (and amount of CB deflection) based on diameters and wall thicknesses...

Sort of like this, from the Contact-Point-to-Contact-Point and Parallel-Lines Aiming Systems resource page:

FYI, I just posted a new video that discusses and demonstrates various visualization techniques that can help you improve your aiming skills in pool, allowing you to pocket balls more effectively and more consistently. Check it out: Contents: 0:00 - Intro 1:06 - Contact Point 2:22 -...

Good addition: Coriolis System for aiming swerve and massé shots

I'm glad to hear it. I aim to swerve. 🤓 PS: I know you were kidding.