Current Projects chat and miscellany

If you adjust gear ratio at the same time as you adjust crank length to maintain the same gain ratio, crank length selection becomes arbitrary over quite a large range, far larger than the range offered on mainstream commercial product in adult sizes. Some very small adults, or people with range of movement problems, need shorter cranks but nobody needs cranks longer than 175. They might select them based on preferred cadence, and Zinn might keep telling them they need them because he manufactures long cranks, but all the good science* on the matter points to crank length within a wide range having no measurable effect on overall biomechanical efficiency.

So crank length does make a difference, but only to what cadence is comfortably maintained, but not to actual power output?
Do longer cranks mean that hills are easier as more leverage, a bit like engines having higher torque level don't struggle so much up a hill, but won't necessarily have a higher power output (HP)?
i.e. - longer cranks = diesel land rover, short cranks = nippy hatch back? Or, the rider still has same power output, but crank length allows it to be used in different ways.
Or do other factors apply, optimal cadence for set ratio, or is it more that each person finds what works for them?

haha, ok, yeah quite a big fail, all turned up fitted it, did not line up with the rear cog and even with the chain ring on the inside it would need a narrower BB, so i'm being sent out another as there seems to be some trouble with the manufacturer?

see now the whole Saddle to bar drop thing, i was always shown that the saddle and headset should be the same, now i see on here its obviously changed since the dark ages, but as i say, the frame is mabie to big for me then, but wont know till the crank is on?

God, I remember my On One project, I got so much wrong on that build, I think I went through 7 stems till I got it right!
You're not doing that bad.
Any build is gonna be a bit of a learning process, hopefully less and less the more you learn (I hope...).