I was wondering about that, since carbon fiber's not really a material that can be forged, right? Forging is a specific process involving heat and pressure, and carbon fiber is fabricated completely differently. Yet I feel like I remember people back then making a big deal of Yamaha's and carbon fiber, so I must be thinking of the Centennial you're talking about there, Stretch. And those plates, ugh....hahahaThe Yamaha SF Forged was forged aluminium. They had a “special” forging process (and a fancy name for it I can’t remember). Many, many failures at QC but most that made it to market were OK. At least until the thermoplastic plate that held the limb in failed. The plate was not present in the SFF2. It was only available in 23” as well so that Explains why it was relatively light. I’m sure if you googlate it you can find an old add with all the marketing jumbo.
AFAIK the only carbon Yamaha was Centenial (Something like that) and it was a collectors item not really intended for use and was $$$$$$.
Just to be clear, Lou, are you saying that the process by which carbon fiber is made involves putting it in an autoclave and forging it using steam? Or are you saying that the process by which various components are made using carbon fiber sheets involves an autoclave, etc.?Caveman, all CF is technically forged. Most CF starts out as sheets of material impregnated with a resin coating. All the various sheets of carbon are layed up in a mold. That mold is then put in an autoclave where it is heated and pressurized with steam. The temperatures and forces are vastly less than in forging metal, but you don't get a completed CF component without heat and pressure.
Fascinating stuff Lou, I've always wondered about carbon bike frames- my dad spent a bunch of money on one back in the day and it was amazingly light (dunno about $6k light though...). The looms you refer are more what I had in mind when thinking of carbon fiber manufacturing. I'm pretty sure when it comes to arrows companies like Easton try to use a single sheet of carbon fiber in their production runs, which they roll around either a mold or an aluminum core depending on the arrow. I don't know much about the manufacturing process, that's just what I've picked up from various sources and I absolutely could be wrong.Cave, the first of the two. Actual carbon fiber is made on looms much the way any woven fabric would be. The woven material is impregnated with heat-activated resin. For bicycles, which is what I'm most familiar with, a three part mold is used: two pieces for the outside upon which the strips of CF are laid in a specific pattern, and then usually a third part that inflates inside the mold to compress the CF against the inside of the mold. Some cheaper bike frames don't use any internal mold or bladder and the result is weak spots over the length of a part.
so ur saying that archers want a good riser? who knew?Thanks for all the comments, opinions and technical information on risers. Lancaster Archery has 70 ILF Olympic recurve risers listed. Priced from $99.99 to 999.99. Made from aluminum, carbon fiber and magnesium. Made by casting, forging, forging and machining and CNC machining. Made by numerous companies. I believe most amateur archers are looking for a riser at a reasonable price that they can reasonably believe it wont break, the limb pockets will be in line, the stabilizer bushing will be on center, no twist, etc. Confusing! Any comments?