[Greenbuilding] bike pump

[Speireag Alden]

Sgrìobh Keith Winston:

>What about using a big bike tire, the biggest/thickest that'll fit on
>your bike, as a form for the concrete... I wonder how you could inject
>it full?

     Attach it to a motor turning at the right rate, and stand a bit 
to the side and inject wet concrete in.  You'll get some spill, but 
properly done, the rotation would hold and distribute the stuff.

>Or, wrap the rim directly in (scrap) wire (which you could do
>by having someone pedal the suspended bike fairly easily). Ideally, you
>do this on a spare wheel, so you can pop off the wheel and put on the
>street wheel and ride away. How heavy would the rim need to be to get a
>good flywheel effect? And, is there some way you can simple set the bike
>into a bike exercise stand or something, rather than have the
>complicated belt around the rear wheel? That seems prone to problems to
>me...

     The guy whose web site was referenced has done a lot of 
experimentation along these lines and talks freely about it.  Worth 
checking out.  Turns out that there are significant inefficiencies in 
a bike stand, and also in a belt.  He has it better optimized.

-Speireag.

-- 
A wise man will make haste to forgive, because he knows the true 
value of time, and will not suffer it to pass away in unnecessary 
pain.
--Samuel Johnson, lexicographer (1709-1784)