Oh, no bad at all...just thought I would let ya see some good content quicker.

wow this thread is very helpful thank you very much

great thread ship!

best thread ive read yet. bump for the boys that havent read it

bump for the most valuable thread of all time

Thanks for the bump, I think it gives myself a lot of insight on what I've been doing wrong and some misconceptions I had.

Thanks

i bumped it cuz i just linked it in yr thread!

As a mechanical engineer, I approve of this thread and that D-plane guy

Glad to see lot's of people are getting their head around the D-plane & understanding true ball-flight laws. Remember, all these are based on center-faced hits - if the ball is hit off-center many different things can happen. If you haven't been on a trackman, it's worth it to see your numbers, it can give you a much greater understanding of how the numbers interact with each other. One of the best videos regarding d-plane/ball flight laws is by my buddy Joseph Mayo - he & Grant Waite are partners and he posted a video a couple months ago that is really good regarding ball flight.

As a trackman owner & d-plane instructor myself, I'm happy to answer any questions you might have regarding numbers or how to change them.

On a side note, we have some very cool research developing on low, spinning wedges and what kind of numbers produce those shots. I'll be happy to share what we're finding if anyone is interested.

Understanding the ball flight & working on a trackman can make a huge difference in your game in a very short period of time. It's really understanding the physics and realizing that Fact trumps Feel.

I'm interested in these low spinny wedge shots. I'll hit one randomly every once in awhile that comes off very low and just feels like the club "threw" the ball off the face and hits and stops dead.

Biggest influences we are finding are: shallow angle of attack (letting the club "bruise" the ground, not gauge a divot), large amount of shaft lean (around 10 degrees), and low contact on the face of the club. Many players have been able to get more consistency by practicing with a less lofted club and working on coming in very shallow while keeping the handle very far ahead of the face. This will help the ball contact lower on the face. Obviously, clean, sharp grooves and a tour caliber ball increase spin as well. We are doing more research on turf conditions and the effect on spin on the wedge shots. Most players feel that firm conditions will increase spin, but have been able to get some great numbers from advanced players on softer turf and, in some cases, out of very light rough, with the proper spin loft. Spin loft is dynamic loft - angle of attack, which means that the common thought of hitting down on the ball will create more spin is simply not true. By moving the ball further back in the stance will create more angle of attack, but the dynamic loft will be offset by a similar amount, so spin loft will be unchanged. The other big factor is speed - more speed with the conditions above (primarily spin loft)will create more spin.

cool stuff. The contact low in the face is interesting and makes me think the resulting shaft flex might be involved in the results somehow.

this one?

http://www.youtube.com/watch?v=-89M1vt66FA

Yep. Joe is a great guy & we trade a lot of info on Trackman. Enjoy.

We are doing some testing on shafts. Right now, I'm finding an addition 400-600 rpms with the KBS Hi-Rev shaft over others. I've only tested it with a few people and a couple heads, but it is consistently producing higher spin. Good players are seeing it almost spin back on 30 foot pitches. Looking forward to seeing how it performs across the board.

Another piece is friction - I mentioned clean, sharp grooves, and a good ball, but particles of sand can also increase spin dramatically (tight sandy soil).