Today was another bit of mocking-up to check & recheck if I am barking up the wrong tree (as opposed to just barking-mad).
This time we have 3 major components all clamped together in layers to see what the end-result might look like and to check some of the critical dimensions.
The spar with the pivot on ismonstrously heavy a little bit heavy but most of that is the industrial strength tube & the 2 TRB's.
When assembled as shown below I can still step over the front wheel and step backwards and the front edge of the seat is where I need it to be.
This, all without any steering gear/bars in the way (as yet). The option to use "tank steering" has been briefly discussed but my preference would be for a traditional "bars fixed to front frame" solution.
If I keep the entire front half detachable via the 2 bolts that hold the pivot carrier to the spar at the front then disassembly for car transport is very viable and probably desirable.
Having checked the critical dimensions I can see that the front spar with the pivot can be shortened and attached further rearwards (rotating the BB shell further forwards and clockwise) while the arms of the front frame that connect to the pivot can be shortened (movingthe BB rearwards) to keep the BB axle in the correct orbit/distance from the seat mounting point.
Still lots to do, but I am limited in how much I can do in one go at the moment.
This time we have 3 major components all clamped together in layers to see what the end-result might look like and to check some of the critical dimensions.
The spar with the pivot on is
When assembled as shown below I can still step over the front wheel and step backwards and the front edge of the seat is where I need it to be.
This, all without any steering gear/bars in the way (as yet). The option to use "tank steering" has been briefly discussed but my preference would be for a traditional "bars fixed to front frame" solution.
If I keep the entire front half detachable via the 2 bolts that hold the pivot carrier to the spar at the front then disassembly for car transport is very viable and probably desirable.
Having checked the critical dimensions I can see that the front spar with the pivot can be shortened and attached further rearwards (rotating the BB shell further forwards and clockwise) while the arms of the front frame that connect to the pivot can be shortened (movingthe BB rearwards) to keep the BB axle in the correct orbit/distance from the seat mounting point.
Still lots to do, but I am limited in how much I can do in one go at the moment.