On Mon, 10 Feb 2020 12:43:46 +0000, Max Demian
wrote:

On 10/02/2020 12:36, Graham. wrote:
fred Wrote in message:
For various reasons I wish to run a thinnish pull cord via 4-5 pulley wheels. Does anyone know if smaller pulley wheels offer more resistance than big ones?

Bell-cranks might be more suitable than pulley wheels.

That would depend on the length of the pull.

And even with a short (sub 90 degree rotation even) pull, aren't bell
cranks less efficient the further the line of pull goes from 90
degrees (giving 0% efficiency at 90 degrees)?

A conrod to crankshaft is such a link where you need a flywheel to
take you past the two areas of no efficiency (of the linkage)?

Cheers, T i m