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Old 09-27-2007 | 08:52 AM
  #8  
da Rock
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From: Near Pfafftown NC
Default RE: Pointy props

Actually, the outer area of the prop is where most of the lift is created. But, right, not right at the tips.

Truth is, with props, none of the sound byte wisdom is of much real value. Yeah, all are somewhat true, but props aren't so simple that just the tips, or just the shape, or just the composition, or chord, or area, or what rpm they turn on the ground, or their weight, do enough by themselves to decide how any prop matches your engine/airplane. Have I mentioned the airfoil matters and it's chord and thickness.

It's kewl to talk about the details but with a prop, the details don't decide spit.

For a couple of reasons. For one thing, if you did a pitch check on any make of prop that was say a 6" pitch, you'd find a bunch of different pitches all the way out the prop. Why? Because to get the prop to pull the airplane through the air 6" for every revolution, the speed of the prop matters, and is different at each radius. And a lot of props change airfoil with radius. And that's just the beginning...................

Don't get fixed on any detail about props. Try everyone that seems suited to your engine. You'll be surprised. Almost all will work good. No matter what their tips look like. Some will work better. But lots of times the best one won't be much different than the average ones.

And did you know that very often the best summer prop isn't the best winter prop? It's the different tip shapes that do that, right?