double freewheel double drive fixed
08-26-05 | 05:14 PM
#26
Senior Member
Joined: Feb 2005
Posts: 1,213
Likes: 1
From: Pleasanton Tx
Bikes: old,older.and very old
08-26-05 | 06:10 PM
#27
hateful little monkey
Joined: May 2003
Posts: 5,274
Likes: 0
From: oakland, ca
Originally Posted by Wil Davis
That's exactly what you hear with the old Sturmey-Archer 3-speed hub-gears† when in the higher gear. From what I remember, direct-drive is the 2nd gear of the 3 and when you're in the 3rd (high) gear, the planet-gear carrier is being driven by the input cog (the one the chain is on), the sun-gear is fixed (to the axle/frame), and the annular-gear (connected to the hub/wheel) is being driven at a higher angular rate than that of the input cog, and the clicking you're hearing is in fact the free-wheel…
(God, I haven't seen the inside of an SA hub since I took one apart about 40 years ago - all the above is from memory…)
- Wil
† hub-gears - such wonderful devices, beautiful, elegant, no external bits to break off - just make sure you add a few drops of sewing-machine-oil (3-in-1) to the little oiler cap (remember those?) regularly…
(God, I haven't seen the inside of an SA hub since I took one apart about 40 years ago - all the above is from memory…)
- Wil
† hub-gears - such wonderful devices, beautiful, elegant, no external bits to break off - just make sure you add a few drops of sewing-machine-oil (3-in-1) to the little oiler cap (remember those?) regularly…
08-27-05 | 10:57 AM
#28
sometimes it hurts...
Joined: Aug 2004
Posts: 187
Likes: 0
From: Denver, CO
Bikes: 2006 DeBernardi Track, Home-made Tall Bike, Custom 3-Speed Schwinn? Road Bike.
maybe it's just me, but if you really want a high gearing that you can skid in, why not just rig up a coasterbrake? you could set it up with some crazy steep gearing, but you'd always be able to bust the skid.
08-28-05 | 03:43 AM
#29
LF for the accentdeprived
Joined: May 2005
Posts: 3,549
Likes: 0
From: Budapest, Hungary
Maybe because he wants to ride FIXED ?
It'd be easy to skid a singlespeed with disc brakes, too...
Which brings me to the conclusion we somehow managed to overlook so far: a double freewheel with different gear ratios on the two sides would NOT be fixed
It would allow pedaling anywhere between the cadences of the two freewheels, both coasting.
It'd be easy to skid a singlespeed with disc brakes, too...
Which brings me to the conclusion we somehow managed to overlook so far: a double freewheel with different gear ratios on the two sides would NOT be fixed
It would allow pedaling anywhere between the cadences of the two freewheels, both coasting.
