Counter Rotator???

[Anonymous]

Interesting Tidbit

"Contra-rotating propellers, also referred to as coaxial contra-rotating propellers, are a complex way of applying the maximum power of a single piston or turboprop aircraft engine. Contra-rotating propellers are common in some marine transmission systems, in particular for medium to large size planing leisure crafts. Two propellers are arranged one behind the other, and power is transferred from the engine via a planetary gear transmission. The configuration can also be used in helicopter designs, where similar issues and principles of torque apply. Contra-rotating propellers should not be confused with Counter-rotating propellers, a term which describes twin-engined aircraft with the airscrew on one engine turning clockwise and the other counter-clockwise"

Ya'll have a safe weekend!
Felber

 

[coondog123]

Since we are getting technical this morning. :lol: I have a couple questions only a dummy would ask.

Most of your wives know more about airboats than I do but that doesn't stop me from having all these crazy questions bouncing around in my head that only you guys here can answer, so please be patient and Thanks in advance.

If money was not an issue which I assume is the drawback. Then wouldn't contra-rotating props be the way to go. Actually seems like a no brainer to me, but then again I am just trying to learn this stuff.
To me the Pros would be"
You don't have one side of your boat being pushed down.
You are getting more thrust out of the same engine set up.
It should be make less noise.
On possible con I would like to hear about.
Seems like the unit could be high maint.

While on the subject of prop rotation. What determines the rotating direction of a prop. I have never paid any attention to which direction an automobile engine turns and thought they all turned the same. Can the rotation be changed? Is the rotation determined by which way you rotate them to start them? Now I am showing what little I know. Is one direction better than the other.
Thats enough for today, you all have fun riding your ariboats around this weekend and when I am mowing grass I will pretend my tractor is an airboat and I am sliding around the yard.