| Every
once in a while I find myself needing to make a three or four bladed
prop. Usually it’s to add scale realism to a WWII warbird,
but there are other uses for this too. With additional blades you
can reduce prop diameter without great power loss, and that can
solve certain clearance problems associated with scale landing gear,
pusher-props, and so on.
We usually have a good idea what size two-blader to use with a model.
It’s standard equipment in most kits, and the plan usually
specifies prop size. But how much do we reduce that diameter when
we add additional blades?
The answer to that question is this week’s tip, contributed
by Martin Hepperle.
For you theorists out there, here’s Martin’s technical
explanation |
