RC drive with 3 speed gearbox idea, will it work??

[boostjuice]

Ah yes, now that's an easier chainring adaptable alternative to the southpaw LH freewheel. Good find Spinningmagnets!

http://www.staton-inc.com/store/pro...HAND_thread_freewheel_sprag_clutch-967-9.html

 

[jmygann]

but where is the 3 speed for pedaling and motor ?

here is a 3 speed ... but not sure of the application ...

http://www.ebikestop.com/sturmey_archer_s3x_3_speed_fixie_hub_kit_with_barend_shifter_36h_120mm_silver-HU2229.php

 

[ktronik]

Well news flash, SA make a 3 and 5 speed gear box, for trikes!!

http://www.sturmey-archer.com/userfiles/catalogs/Sturmey-Archer-2010-2011-Catalogue-A2-Low-Res.pdf

Have a look at the gearboxes, TS-RF3 pg 22 of PDF and QS-RC5 same page, http://www.sjscycles.com/supersize/19015.jpg

they just run a chain ring, mounted to the hub spoke flange...OK so we could use say any 36 hole and every 6th hole to mount 6 screws to mount a custom chain ring to what ever hub I use...(fixed)

Looks like I will have to make the output of the gear box freewheeling if I can't find one for the bike rear wheel

k

 

[jmygann]

3-Speed Hub Freewheel Adapter Kit

New
3-Speed Hub-Compatible Freewheel Adapter Kit
Allows a standard BMX 1.37" 24 TPI freewheel to be used in conjuntion with a larger, independent motor-driven sprocket on a Nexus, SRAM or Sturmey-Archer 3-speed hub. Having a "second" freewheel in back eliminates the need for installing a special freewheel-equipped crankset, so that the motor doesn't drive the pedals, when it is on. Four holes are provided in the adapter base that match up to a standard 16T 3-splined Nexus cog (not supplied...). The steel cog is then sandwiched between the freewheel adapter and the motor sprocket/adapter, using the supplied stainless steel button-head screws, nuts and lock washers, along with the supplied black-anodized aluminum spacers/standoffs. This assembly fits on the splined hub and is held in place with the standard circlip, provided with the hub. Then, a standard BMX-type freewheel, which are available with 16-22 teeth, is screwed onto the feeewheel adapter. This adapter is compatible with all popular 3-speed hubs, including Nexus, SRAM and Sturmey-Archer.

http://www.tppacks.com/products.asp?cat=26