Re: [RBW] Internal Hub Efficiency: What the Experts Say

2009-11-19 Thread Eric Norris
s for the > chain setup and best case efficiency numbers for the IGH. Based on > this, the other calculations are off too. > Correct me if I'm wrong. > > --- On Thu, 11/19/09, Eric Norris wrote: > > From: Eric Norris > Subject: [RBW] Internal Hub Efficie

Re: [RBW] Internal Hub Efficiency: What the Experts Say

2009-11-19 Thread Ron Farnsworth
On Thu, 11/19/09, Eric Norris wrote: From: Eric Norris Subject: [RBW] Internal Hub Efficiency: What the Experts Say To: rbw-owners-bunch@googlegroups.com Date: Thursday, November 19, 2009, 12:35 AM For those who don't have a copy of "The Dancing Chain" laying around  the house,

[RBW] Internal Hub Efficiency: What the Experts Say

2009-11-18 Thread Eric Norris
For those who don't have a copy of "The Dancing Chain" laying around the house, here's a summary of what Frank Berto said about internally geared hubs (IGHs), which is itself a summary of extensive bench testing done in 1998: --Standard derailleur systems achieve 98-99 percent efficiency whe