but what is the drag factor? Is it a setting that should be ltered or a measure of how clogged the fan is?
[edit] too quick there!
So the drag factor is realy what i should be setting when adjusting the resistance, i did notice that the new gym machines I set the resitance 1 and a bit higher than the ones in the council gym.
as the fan clogs the oar feels lighter. As it clogs it changes less air wiht outside, the drag factor drops and the fan slows less during the return. It is replicating how much the boat speed through the water drops.