ORIGINAL: Moppie
I’ve had a number of discussions with guys running full size boats.
They describe a three blade prop as the ideal set up for high speed surface.
The three blade design gives you more water contact than a two blade. Three blades also allow a better use of the air pulled into the prop during its rotation. But they suggest not exceeding three blades for surface running. I’m planning on playing around with both. But as you know props are not cheap and take time to sharpen and balance.
Lets see, 1/12 scale boat running at 35 mph would be around 420mph at full scale. I think I got that right? That’s hauling…
you would need one damn large prop for a 2 bladed design.
and if a 3 blade is so efficient. why don't i use on on my boat?
full size boats is what i do best.
also there is more to calculate scale speed then just some simple math.
you have to base it off of a real boat i could have a dingy that does 8 mph or i could have a dingy that does 150 mph.
when you base something of a scale speed then that would have to be the approx speed of its full size cousin.
but if you want to just scale up speed and compare it to nothing then that is what you would do.