REFLECTOR: Propellers 1 2 3 4 Blades

[gstull at tampabay.rr.com]

It's not totally true that a 2 blade prop is longer. It depends on how much pitch there is. 
---- Mark Magee <edjonesbrady at gmail.com> wrote: 
> The less blades, the longer the blade, the closer the tip is to the runway, the most FOD.
> 
> Mark B. Magee
> N34XL
> Sent from IPhone 4S
> 
> On Nov 17, 2012, at 10:46 AM, Velocity <velocityxl at fastmail.fm> wrote:
> 
> > I am working on making my second propeller. My first one is a three blade. I works just as
> > it was designed for,  great take off performance. I  now think I would like to have one that has
> > a bit more top speed. Now a single blade propeller is the most efficient but a little
> > impractical and hard to balance. So my question is a 2 bladed propeller  would be the next most efficacy
> > and easiest to build but my fear is having both blades traveling through the wake from the wings.
> > at the same time . A four bladed propeller  has the same issue as a two blade just twice the frequency .
> > Any thoughts on the choice of number of blades.
> > 
> > More blades equals smaller diameter but I have enough room to swing a 2 blade so that is not an issue .
> > 
> > Long easy guys seem to have no issue with two blades . Any one in the velocity world
> > use a two blade propeller with or with out success?
> > 
> > 
> > Ron
> > 
> > Velocity XLFG  Chevy LT1  300 hp
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