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BACKPEDAL (COASTER) Brake Actuation for DErailleuRs

 

 

Backpedal stirrup details

 bucketOn a 5 speed. Watch Video

bucket Ratchet tripped, arm swung back, brakes pulled, chain slacked. Drawing with Improved Ratchet

bicycletrailer    ReCycle Trailer from scrap frame

Pedal axles in rear wheels

dtrs

Inverted trailer to show frame, slit in torque tube, central pin

 

 

 

    Rear front wheel stored by front

 

 

 

·         Strong controllable braking independent of hand position/signalling/cargo

·         Ideal for the rear stirrup brake of traditional English/Indian/Chinese bikes

·         Also simple for cable braking and rear derailleur gearing

·         2 or 3 moving parts very simple to make

FARTHING PENNY  Bucket (Bouquet) Cargo Bicycle 

·         Carries a 20L bucket of cargo with multi- pocket organiser for mobile etc 

·         Small bike handling and manoeuvrability with big bike power

·         Silent and powerful backpedal braking with derailleur gearing

·         Sit up & Beg handlebars provide elbow rests for Praying extension

2012:  Folding   ARM BOOST Bucket BIKE

2013 strong  Arm Assist CARGO Bike

  ReCYCLE Bike  Cargo Trailer

     Compared to car utility and boat trailers, bike 2 wheel trailers have a much narrower wheelbase and less deadweight so it is  preferable to have the bottom at minimum ground clearance of say 4” , (the same as the pedal). Otherwise with the good inclined cornering of the bike a heavy (and high) load can easily flip the trailer. Even with inflated wheels the shock on rigid trailer (and bucket) cargo is fairly high so a suspension is useful to reduce the noise of loose cargo and possible damage.

   Remarkably these desiderata,  rarely achieved in custom trailers,  can be met with a compact trailer weighing only 18 lbs and made entirely of cycle components.  An old bike frame makes a lightweight trailer skeleton with an offset rising arm for loose vertical bolting to your bicycle for short loads. The seatstays are cut off and rewelded to the bottom bracket lugs of the removed chainstays to form this triangulated arm.

The trailer wheels are 16” or 20” rear wheels with the axles replaced by pedal axles Make sure you mount the wheels freewheel-side in, as they are dished, and mount the lefthanded crank thread on the lefthand side. They are easily screwed onto pedal cranks whose big ends are welded to the ends of (1" EMT electrical conduit) tubing which passes through the  head tube with a central locating pin. This EMT is best slit lengthwise for torsional flexibility to give a suspension to the extent the cranks are angled ahead. The cranks are pointed up too to lower the frame below the wheel axles.

Multiple pin holes in the frame allow adjusting the height and suspension effect between straight ahead cranks for storage and max suspension for heavy fragile loads to be cycled slowly to say 60 degree up cranks for light rugged loads to be carried low and fast.

There are mainly different styles of pedals. ½” or 9/16” interthreads and outer . 5/16 or .278”(24 tpi)  threads. One piece cranks are always ½” and the right side often has a flaring at the axle which is easy to weld to the EMT as is the big end of a standard cranks.  Front wheel axles are 5/16-24 so their threaded cones can used instead of the too-small pedal outer cone on 5/16 pedal axle ends. The dirt cover can be pressed off and replaced with a bigger one or the entire hub outer end covered.

 A sleeve can drilled from 3/8 rear axle to allow mounting the normal 3/8-24 thread rear cone on a .278” pedal. Chuck the axle segment in a drill press and use a stationary center drill and then H&J letter drills clamped in the table vice. Set those upright by lightly chucking the wrong ends. 


 
Tow-a-Bike to a Friend

      This is an easy way to tow an empty bicycle behind your bike, for instance to public transport to provide your visitor with a bike. Basically the idea is to remove the front wheel of the bike to be towed and carry it bolted on one side of your front fork. And then mount the front fork of the rear bike over the ends of your rear axle either directly or with some flat bar with holes for the axle and hose clamps for the forks. The connection must be strong but allow the fork to pivot to conform to bumps in the road. The empty rear bike will then tow obediantly behind you with very little drag. The connection is not strong or stiff enough to make this a tandem. Please don’t try