I am very sorry to hear that. Over the years I have had a number of dealings with Mr. Posey and always found him to be a complete gentleman and credit to the industry.
Forum: rodboard

Joe, Excellent explanation. The reason in custom rod building that we should probably use mass rather than weight is that what really affects most rod performance including sensitivity is inertia. Inertia is an objects (fishing rod) resistance to change in velocity or change in position and inertia is the result of mass while weight does not have inertia.
Forum: rodboard

Mo, No, I do not add any more weight than is absolutely necessary. Any added weight including weight added to achieve balance reduces the rods sensitivity. Laurent, An article was published in RodMaker a number of years ago but it had several errors in it. I do not see any reason for the guide geometry to have a significant affect on sensitivity other than as you point out weight is incr
Forum: rodboard

Joe, Sensitivity is a very complicated issue and at least you are thinking about it. Most people just accept the definition, stiffness divided by weight, but this is very over-simplified. One of the reasons that it is important to understand resonant frequency is that how much of the energy arriving at the tip of the rod that gets to the fisherman's hand and what the fisherman or fisherwoman
Forum: rodboard

Joe, You are barking up the wrong tree, actually several wrong trees. Most of what a fisherman feels will be an impulse and not a frequency or if it is a frequency it will be at the rods resonant frequency. The reason is that the mechanical impedance of the rod drops dramatically at the rods resonant frequency. All other frequencies other than the resonant frequency see a much higher impedanc
Forum: rodboard

Spencer, Thank you for the compliment but Ken is correct. I am not very proud of that article now. In the years since it was written I have learned a good deal more about how a fishing rod transmits an impulse or vibration and that article has at least two errors and in at least one area it is very over simplified. It turns out that how a rod transmits an impulse or vibration can be very comp
Forum: rodboard

I am very familiar with John Kaufman. Several years ago I had several phone conversations and numerous e-mail exchanges with John in an effort to get him to build a low cost resonant frequeny analyzer for fishing rod blanks much like the ones that he builds for analyzing golf club shafts. Unfortunately he had more work then he wanted building equipment to analyze carbon fiber golf club shafts a
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Phil, I have a ticket that I am not going to use and will be happy to send it to you. I am not sure that you will get it before you leave so it may be better to send it to the Expo site. I think the address: ICRBE; PO Box 1322; High Point; N.C. 27261; is actually Tom's address. If you think that you can use the ticket that I have send me an e-mail right away and let me know how to get it to
Forum: rodboard

I am going to give this a try. It sounds like a clever idea but don't the wraps that you pull the guide out from under end up being loose?
Forum: rodboard

Ken, I agree with you. I also like the idea of no mixing and water clean up. If the drying time is relatively short, half an hour or less then four coats does not bother me. But if the drying time gets much longer than that then I am much less likely to switch. For me to switch it will also have to be as durable as epoxy.
Forum: rodboard

Richard, If you are looking for the perfect guide positions I think that you are chasing your tail. The function of guides is line control and stress distribution. Neither of these dictates that the positon of guides is critical. What is critical in terms of rod performance is not the exact position of the guides but the weight that the guides add especially with the guides that are near the
Forum: rodboard

I do not mean to be argumenatative but it seems to me that the terms Nanolite, Alconite and Duralite are all just advertising terms that are like many advertising terms that are designed to mislead. Why don't the manufactureers just call the guide inserts what they are, zerconium, aluminum oxide, silicon carbide or whatever they are. There are different grades of these materials but the charact
Forum: rodboard

Tom, When I read your article about all of the blanks that you broke I remember thinking that it was a very limited experiment and I was not sure that it proved very much. I am quite confident because you say they all broke near the butt of the blank that you were mounting them all so that the angle between the load and the butt of the blank was 90 degrees or not much less than 90 degrees. In
Forum: rodboard

Rods are not designed "to withstand such stress" they are only designed to minumize the effect. I agree that a competent designer can minimize but cannot eliminate it. Every rod builder that builds a significant number of rods gets a few back that were over stressed and broke a few inches in front of the ferrule due to stress concentration.
Forum: rodboard

Eugene, I agree with your post but there are a couple of things that I would add. Higher modulus material is more brittle. It is due to the material itself having a lower strain energy but about the same tensile and compression strength. And also due to the fact that less material for a given stiffness is required with a higher modulus material. I know that you are an mechanical engineer bu
Forum: rodboard

In my judgment the spine is a manufacturing flaw and the smaller the spine, in other words, the more uniform a blank is on any plane on which it is being deflected the better the blank. Tom is probably correct that with todays manufacturing processes all blanks will have some spine but I think that rod blank manufacturers should be attempting to eliminate any spine just as the carbon fiber golf
Forum: rodboard

Eugene, The blank I used was a Rainshadow IST1084 from Batson Enterprises but I do not think that you want the center of mass and weight for an assembled rod. I think that you want both for the raw blank. The center of mass and weight will change depending upon how the rod builder assembles the rod. For example, the location, number and type of guides will have a significant affect on both t
Forum: rodboard

There are several things that cause or result in a blank having a spine. All of these things are the result of manufacturing process problems or design flaws. Why would anyone want a blank with a flaw if it could be avoided?
Forum: rodboard

Joe, I think that your answer to Lorenzo's question was excellent and covered all of the bases. I would like to shake your hand some day as well.
Forum: rodboard

Peter, There are half a dozen manufacturing variables that can contribute to where what we call the spine can be. You point out one of them which is how the layers of prepreg that are wrapped on the mandrel. In fact, any curve in the blank can also contribute to what we call spine as Tom's post suggests. However, the biggest factor is the fact that the cross section of blanks do not end up pe
Forum: rodboard

Bill, If you plan on selling rods I think that you will find that your marginal varible costs per rod are very small compared to the fixed costs in heat, lights, square footage used in shop, auto mileage etc. all of which are cost to you and can be deducted on your taxes, income taxes not FET.
Forum: rodboard

Tom, You are correct and I am wrong. The post that I thought that you had removed was on the first page. I apologize.
Forum: rodboard

Tom, Don't you think that it is misleading to remove your post after someone has responded to it?
Forum: rodboard

Tom, This is really off of the subject of rod building but hitting a golf ball so that it will hook or fade is every bit as proper as hitting it so that it will go straight if that is what is intended and the swing that results in those flights of the ball is every bit as "properly swung". Jim, I think that you are right, it is nearly impossible to build a perfect shaft but I have
Forum: rodboard

I am in complete agreement with you about a fishing rod but not about golf club shafts. The shaft of a golf club will not always flex on the same plane even at impact with the ball. Think about hooking the ball or fading the ball and how that affects the flexing of the shaft. You have obviously not spent as many hours over as many years on golf coarses working on your game as I have. I actu
Forum: rodboard

Tom, That is an excellent point. I cannot think of any type of fishing where the rod will always be deflected on the same axis or plane which means that there is no proper place for the spine to be located relative to the guides or relative to anything else. Any rod that is being cast will typically while being cast be deflected at or close to 90 degrees from the plane of the guides. If you
Forum: rodboard

I have never seen any quanitative evidence that the spine had any effect on rod performance one way or the other. Without this type of evidence it seems to me that all we have are opinions. The opinions may come from well respected, authoritative sources or sources that are not as well respected but in either case without any evidence one way or the other we are just dealing with opinions.
Forum: rodboard

Bill, The big rod manufacturers are not idiots and they do understand the physics. Do you actually believe that without having at least a basic understanding of the effect that what you do when building a rod has on the rods performance that you can build a better rod then the big rod manufacturers. Frankly, I do not really care what is or is not an effective marketing tool. I will leave
Forum: rodboard

Bill, I would agree that a fisherman can be very subjective with his or her evaluation of a rod and does not really need to have any understanding of the physics involved. But I think that the fisherman could make better rod choices with a little understanding of the physics. However, it seems to me that for a custom rod builder to not have at least a little understanding of the rods physics
Forum: rodboard

Steve, No, if 70% reduction in weight resulted in a 1% change in performance then a 7% reduction in weight, at the same point on the blank, would not necessarily result in a 0.01% change in performance. That assumes a linear relationship that does not exist. In fact the relationship between weight and performance, resonant frequency or damping factor or sensitivity or whatever is very non-line
Forum: rodboard