to Dave Tutelman's Club Design Notes
This e-book is about how golf clubs work, from the point of view of
an engineer. But you don't have to be an engineer to understand it.
There are some science basics early, explained in intuitive terms (see the Principles
chapter). That is the only science
the rest of the book really uses. You will need to understand simple
graphs or tables of numbers -- but if you don't, you're seriously
limited as a clubmaker already.
You can jump in where you want, or just
read the chapters sequentially. I've tried to be diligent about placing
links, so if you jump in and encounter something that depends on what
came earlier, you should be only be a click away from what you
The Notes were first put on the Web in 1999.
There have been
a lot of advances since 1999 in our understanding of what makes a golf
club work. There have
also been advances in hype, legislation (in the USGA and R&A)
limit performance, and some real advances in club technology and
instrumentation. It has been a challenge to keep this up-to-date, and
what you see here is inevitably behind what I would like it to be. The
updates continue; I know I won't catch up, but I'll keep trying.
At the bottom of this page
you will find a checklist of modifications: intended, under way, and
Status of update:
|Restructure directory in
preparation for lots more graphics.
|More illustrations, definitely. Now
I have a scanner, a digital
camera, and much better graphics software than 1999, so the capability
|Lots of small editing changes to:
- Reflect things I've learned since 1999.
- Use some of the structural changes I'm making, like
beefing up Physics and adding Swing.
|Beef up Physics
to include F=ma, centrifugal force.
|In Physics or
maybe Loft, beef up "distance" to include launch
angle and spin. See if computer simulations can
come up with the same kind of conclusions that are floated as "the
|Fill in Swing.
This includes mechanics of the swing and ballistics of impact.
to make it the first, independent choice; then
indicate interactions with other specs.
|A more intuitive angle on how Swingweight
moment-of-inertia matching relate to one another.
|Something about shaft spines. That
has become something of a hot
topic. I think it's overblown, but it certainly merits some discussion.
This will be in the section on Flex,
and will be fairly short. I'll do a detailed article on spine
separately. BTW, the section on Flex will be substantially updated when
I get to it.
Rest of Flex
|Perhaps a section on
instrumentation. Since I have built my own
frequency meter, NeuFinder 4 (a deflection-based shaft measurement
tool), swingweight scale, clublength rules, etc, I know something about
this and would like to share it.
|Update most of the
chapters. This was inspired by Mike Stachura's
[expected] mention of my "e-book" in Golf Digest in June 2017. I
I better get it to the point where it least it doesn't provide
misinformation. Updated the chapters on Length, Lie, Customizing,
Clubhead Features, Shaft Features, Grip Features, and Special
Situations. The last included a major rewrite of the page on Putters.
outdated Shafts section with a promise to do better soon. (So much of
what we "know" about shafts is different from 20 years ago. This
requires a complete -- and I mean total! -- rewrite.) I left the
existing Shafts pages alone, but it was a close call; I was and am
still tempted to just remove it until I can replace it.
Last updated -- Mar 3, 2019