Too many boats, not enough time...
with all due respect ; they will not
Hmmm......
PADDLE WHELL....... Torque roll?
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Too many boats, not enough time...
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NEED PARALLEL CONNECTORS?? QUALITY 5.5MM, 8MM, 8 AND 10 AWG, GET THEM HERE: https://forums.offshoreelectrics.com/...est!&highlight=
Right, and in addition, the "faster" is also due to the drag factor is one of the reasons why surface piercing propellers are very efficient. One or more blade(s) is always out of the water causing less drag. They are also designed to run with the water line at hub level which keeps the majority of the blade area clear of the water and this reduces drag to a minimum and propulsion at maximum.
Last edited by SweetAccord; 03-12-2015 at 05:03 PM.
boats are being pushed by Props,, not pulled,,, front wheel drive cars pull cars,, as rear wheel drives push the car pretty simple
I am perfectly aware of where the prop is on a boat.
I am talking about the prop boring into the water ahead of it "pulling itself" thru the water thus moving the boat
Hopefully everyone now understands that my question was much more in depth than where the prop is.....................
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A prop in itself is pulling through the water. In order to propel a model boat as the ones we talk about in this forum it is most efficient imo, to attatch it to the rear of a boat for best performance, in doing so the boat is pushed forward by theprop pulling through the water.
DaT sound good enough?:-)
Nortavlag Bulc
Wow I must be bored trying to do some searching for my own stuff and info but stumbled on this mess.
Really, common sense rule in affect depends on location of motor. If motor or driving force of shaft is in front of propeller or impeller or turbine, boat or aircraft its pushing. if motor is behind its pulling. This should be as simple as what the shaft that spins the prop feels and if shaft is in front of propeller it sees force as pushing. If shaft is behind prop it sees it at pull. For general RC boats if it did not push forward you would not need any gap on your flex cables...
With out going back to the debate, the gap on the flex between the drive dog and the strut/stinger has very little to do with where the force is, in today's hi power set up,the twisting torque alone is enough to wind up the cable thus shortening it.
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Too many boats, not enough time...
your right on wind up but for the life of me can't see why this was even a topic. shaft in front its pushing shaft behind its pulling that's as simple as I could get. Now I am going to leave this allllloooonnnnneeeee...
The pushing work is being done by the pressure (back) face of the blade. In our application there is very little/no suction happening on the front face due to aeration as the blade enters the water. If the front side doesn't aerate properly and allows the water to stay attached to the front face, you see a huge increase in load with no performance increase. You want air to efficiently fill the void on the suction side as the blade enters the water.
So the question to ponder now is: How do you sharpen the leading edge to maximize aeration and what effect does it have on lift and cavitation? The follow up to that is: Do different hull types perform better with different leading edge treatments?
Brian "Snowman" Buaas
Team Castle Creations
NAMBA FE Chairman
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