Cranks..

Next I tried to think what would be the optimum crank setup, and I started to search them online, I would like to pass the old tapered type of BB and go directly to ISIS-type to be more rigid. I found an ultimate crank, FSA TT AERO, and with 108mm BB Q-factor would be 135mm, (and with very low price), but... ISIS type of BB's are not manufactured less than 108mm :(. Odyssey Black Widow Lite Arms are quite nice, but uses a tapered BB.. Suigino RD setup comes with the 103mm BB but is a tapered one :(. I quickly sketched one solution, what's your opinion about a crank setup of this:



Dont know are these available anywhere, but would be easily made and relatively sturdy. In some old upright bikes these were used, say years back..
Big plus would be the chance to deside the width to your specs very easily. This is not a splined one, which seems to be available with the same concept, but very hard to make yourself. If someone could offer a splined ISIS BB with different widths, that would save a day or two..

Found also very good site about BB's and cranks:
http://www.sheldonbrown.com/bbsize.html


These cranks are quite nice and narrow, Q-factor is 135mm with 108mm BB. Weight is 600grams + BB (~200grams), ISIS center, lenghts from 170 - 180mm.

The very beginning

First sketch is here, just the very beginning, It's a streamliner !

Intention is to go fast long races of up to 6+ hours. Shell is monocoque, front wheel drive, partially clear bubble for view, disc wheels, "launch wheels", liner can be operated by the rider alone. It should handle well in turns, tilt angle is kept in 40 degrees, turn radius is to be defined later..

The concept is obviously based on some previous existing models, but this is bigger than most to fit myself inside. Pedal box is very large, it's been made for 180 crank lenght !!! I'm planning to make it more narrow with custom BB so I'm able to make fairing a bit lower/narrow. But need to finish the sketch first and make a cardboard model from those critical areas to see how my legs will fit to turn those huge cranks (shorter cranks are offcoure possible).
Front part looks too fat, I need to tune that.. :)

Measurements:
Height with canopy: 37"
Lenght : 114"
Width : 19"
Rider : 6'6", 192lbs

Click the picture to see it bigger. Comments are welcome!!