Mt 2 cents (being a renegade) >From a purely structural standpoint, if the intermediate threaded portions were long enough, the additional finish material that impregnates it and bonds it to the rod material would have the effect of stiffening the rod by increasing the effective cross section. And if the material had a resistance to bending, it would increase the stiffness exponentially, since it is away from the center of the bending moments. It would be akin to putting splints on the rod like you would a broken leg, but it would be a tubular splint. The extra weight would be on the minus side in the lower half of the rod, and probably would not offset the advantage of increased cross-section. The longer the 'splints', the stiffer the action.
Are these rods intermediate-wrapped all the way to the tips? These wraps out towards the tip area would seem disadvantageous, as the cross-section would not be assisted that much- the rod being very thin- but the weight of additional wraps slowing down the action. Like I said, from purely a structural design standpoint. DonO ----- Original Message ----- From: "mark romero" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, October 07, 2003 1:36 AM Subject: Re: [VFB] Rod building question > wwwwwwwwwwoooooooooooooooooooooooooooooooooowwwwwwwwwwwwwwww. mark > > > >From: Henk Verhaar <[EMAIL PROTECTED]> > >Reply-To: <[EMAIL PROTECTED]> > >To: <[EMAIL PROTECTED]> > >Subject: Re: [VFB] Rod building question > >Date: Tue, 7 Oct 2003 07:56:02 +0200 > > > >*This message was transferred with a trial version of CommuniGate(tm) Pro* > > > >On maandag, okt 6, 2003, at 23:19 Europe/Amsterdam, Allan Fish wrote: > > > >>*This message was transferred with a trial version of CommuniGate(tm) Pro* > >>From a bamboo rod builder: > >>> > >>> In a little bit of a hurry so let me reply quickly. Both theories > >>>are true. Intermediate wraps do keep old hide glue rods together. They > >>>also stiffen the action. I've built rods with and without intermediates, > >>>and there is a marked difference. Just think about it... the > >>>intermediates definitely make the rod larger in cross section, thus > >>>increasing the taper. They simply must make a difference. > > > >I'm sorry, but I don't buy this argument. Think about it: use butter for > >your intermediate wraps. Would that make tha rod stiffer? DOn't think so. > >If stiffening should be a product of the diameter as such, the material > >that constitutes that additional diameter has to have certain physical > >characteristics and design parameters. Intermediate wraps don't have those. > >I.e. the wrapping thread is not stiff by itself, Therefore, the only way it > >could add markedly to the action of the rod (as an added material, not as a > >moderator of the bamboo, see later) would be if thread were incorporated > >(integrally) in the 'blank' in a longitudinal direction (just like fibers) > >so that it could be loaded under tension while bending the rod. > > > >I still think that the primary reason for intermediates was structural > >integrity. Any effect on the stiffness of the rod (and I am NOT denying > >that intermediates may have an effect on stiffness) has IMNSHO got to stem > >from an effect of the additional wraps on the bamboo blank. As said before, > >I suggest that intermediates may e.g. increase the pressure on the glued > >surfaces, decreasing (micro)slip or plastic slip (dunno if there is a term > >for this, but what I mean is that in bending the sections may ever so > >little move in respect to one another, along the glue lines, plastically > >deforming the glue itself) and thereby increasing the tendency of the whole > >rod to resist bending (i.e. making it stiffer...). > > > >This is only an hypothesis though... > > > >henk > > > >====================Heisenberg was right!========================= > >| Dr. Henk J.M. Verhaar | | > >| Principal | e-mail: [EMAIL PROTECTED]| > >| Ecotoxicology specialist | home: [EMAIL PROTECTED] | > >| ENVIRON Netherlands B.V. | | > >| Zeisteroever 17 | phone: +31 30 698 6218 | > >| NL-3704 GB Zeist | fax: +31 30 698 6239 | > >| the Netherlands | | > >====================Uncertainty happens!========================== > > > > _________________________________________________________________ > Instant message in style with MSN Messenger 6.0. Download it now FREE! > http://msnmessenger-download.com >
