well that seems much more sensible nbucska, thanks. i think it'd be a little less, becuase the engine will only be about 80% efficient - but now i have an idea of how much air i need to move.
anybody got any good ideas for a fan/turbine suitable? it should probably move about 50cfm.
cbarn - i didn't see your post until after i last posted
i know my flow rate doesn't seem right. my motor uses 1.25 litres of petrol in about 15 minutes. can somebody check my sums??
1.25 litres / 15 mins = 833 ml/min
883 ml*fuel x 14.7 = 1.225 litres*air
1.225 litres/m = 0.04325475 cfm
???
that was pretty cool, but as you can see from http://www.madsens1.com/graphics/ceder4.jpg , that blade was still put to shame by this one in general production. that's the 3120xp in the picture (but i don't have a blade).
i was tinking about chopping up a portable vacuum cleaner for its motor...
i've got a husqvarna 3120xp - i don't think there is a bigger chainsaw (actually i know of a bigger american one, but it's an egrigate chainsaw, and really heavy). besides, i'm not actually using it as a chainsaw, i'm using it for an rc tank.
what uses a 24v turbine? model aircraft perhaps?
i'm making an electric supercharger for a petrol chainsaw. i need to find a fan capable of the job. it must run at 24v, increase air pressure by 10-15psi, it doesn't need to move a great volume (normal intake is only about 1.25 litres per minute; less than 1/20th cfm). it does need to be small -...
