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Search: Posts Made By: fietsbob
Showing results 1 to 8 of 8
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Forum: Alt Bike Culture
06-30-20, 05:33 PM
Replies: 41
Views: 16,593
Posted By fietsbob

My 3 by 3 by 3 speed was 27 speeds 3 to 3rd...

My 3 by 3 by 3 speed was 27 speeds 3 to 3rd power.
or 3 cubed

3 cogs on a 3 speed hub & triple crank..

bike was what I made up in about 1957..
Forum: Alt Bike Culture
01-15-19, 03:20 PM
Replies: 41
Views: 16,593
Posted By fietsbob

Math time

then you calculate the gear ratios and eliminate the redundancies and those with range overlaps and see just how many different useful gear ratios you have left..

hint : its less
Forum: Alt Bike Culture
04-20-18, 02:30 PM
Replies: 41
Views: 16,593
Posted By fietsbob

As I recall the big ring on a Da Vinci tandem ...

As I recall the big ring on a Da Vinci tandem is not very big ...


http://www.davincitandems.com/wp-content/uploads/2014/09/1236774_10151854852873151_1808853192_n.jpg
Forum: Alt Bike Culture
12-26-17, 09:54 AM
Replies: 41
Views: 16,593
Posted By fietsbob

CVR = continuously variable ratio, So gears...

CVR = continuously variable ratio, So gears beyond number.. Infinite, is not finite.. beyond a numbering scheme..
Forum: Alt Bike Culture
10-08-17, 11:54 AM
Replies: 41
Views: 16,593
Posted By fietsbob

Yes apparently, Sun Race S-A is continuing to...

Yes apparently, Sun Race S-A is continuing to make a IGH & cassette driver combination Hub.

Sram is going for the High end road end MTB sector.
Forum: Alt Bike Culture
09-13-17, 09:06 AM
Replies: 41
Views: 16,593
Posted By fietsbob

1 NuVinci CVR hub out of the wheel, driven by the...

1 NuVinci CVR hub out of the wheel, driven by the cranks, Driving a 2nd NuVinci CVR in the rear wheel, could give you double infinity gears :lol:
Forum: Alt Bike Culture
09-09-17, 02:34 PM
Replies: 41
Views: 16,593
Posted By fietsbob

Look at John Howard and Fred Romplelburg's ...

Look at John Howard and Fred Romplelburg's Motor paced speed record bikes for examples of how counter shafts
and 2 or 3 stage gear advantage, let them ride at over 150mph once the wind/air...
Forum: Alt Bike Culture
09-08-17, 01:24 PM
Replies: 41
Views: 16,593
Posted By fietsbob

the hybridization of a cassette driver on the end...

the hybridization of a cassette driver on the end of a 3 speed internal gear hub,IGH from Sturmey Archer will be 3x 8, or 9 speeds depending on your cassette choice

there is the potential to put...
Showing results 1 to 8 of 8


 
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