2 blade or 3 blade
 

what is better for speed 2 blade or 3 blade propeller for a villain ex

RE: 2 blade or 3 blade
 

I don't think anyone has ever tried a 3 blade. If they have I do not remember it being reported. It would be very interesting to see how a 3 blade would be work.

RE: 2 blade or 3 blade
 

yea wich is y i posted this poll.

RE: 2 blade or 3 blade
 

2 blade is better for speed, 3 blade is better for out of the hole.
The Villain is already quick out of the hole because of the two motor set up, so go with the two blade.

RE: 2 blade or 3 blade
 

i was on a boat wb site yesterday and i saw a 5 blade. im like *** it was on a eletric cat.it was sweet

RE: 2 blade or 3 blade
 

Those props are usually for scale boats like war ships, I could not imagine what it was doing on a cat

RE: 2 blade or 3 blade
 

you will in fact find 5 bladed props on fullscale offshore racing catamarans.

check out the specs of the Maritimo cat:
http://www.maritimo-offshore.com.au/...SPECIFICATIONS

and another fast boat:
http://www.powerboatmag.com/2005test...ch_results.pdf

and another cat running a 4 blade:
http://www.american-offshore.com/Art...0/NSXindex.htm

As to why 4 and 5 blade props arent available (that I have found) for model boats, i dunno! Maybe its not effective. Probably because of the different physics that come into play when you scale things down.

RE: 2 blade or 3 blade
 

You need ot look around. I've seen a 5-blade that a guy had machined himself and there are 6-blade props that have been hand-made but this boat won't spin them.

RE: 2 blade or 3 blade
 

I have a 4 blade prop for my gas boat all shined up and ready to test. They aren't cheap to get worked. I usually work my own props but this big 4 blader would have taken me a long time to do.

RE: 2 blade or 3 blade
 

Lol. you need to do some looking.

RE: 2 blade or 3 blade
 

My experience is dead opposite of this. 440/3 cavitates like crazy. 642/2 zipppppp!

RE: 2 blade or 3 blade
 

what do u mean by zippppp

RE: 2 blade or 3 blade
 

I am in these forums all the time and I never hear anyone talking about anymore than 3 blades. Why is that?

RE: 2 blade or 3 blade
 

The more blades the more cavatation.

Grim

RE: 2 blade or 3 blade
 

well no offense but this forum aint the place find it . . . i have seen money boats first hand and driven them .
quite a sight.

I was thinking of putting one of my 5 bladed merc cleavers off my real boat on my rc one. then i thought it might be to fast so i didn't

RE: 2 blade or 3 blade
 

I don't think it would fit anyway:D

RE: 2 blade or 3 blade
 

:D:D:D:D

RE: 2 blade or 3 blade
 

yeah. i could have made it fit but it might sink the boat.

RE: 2 blade or 3 blade
 

yea

RE: 2 blade or 3 blade
 

I believe it depends on the drive system i.e., surface or submerge.
If you’re running submerged, I would tend to lean toward as much as 5 blades.
Surface, prop speed maybe a factor too. This is an area that I intend to explore in the coming months. I’m running a surface drive and feel that 3 blade maybe a more efficient set up that 2.

RE: 2 blade or 3 blade
 

With the little knowledge I have of physics, I don't see how more blades can be more efficient than less blades.

RE: 2 blade or 3 blade
 

I'm not sure about the physics of the efficiency of props but I do know what I see on pictured race boats (particularly gas), and that is that most that I've seen run a 3 blade prop.

RE: 2 blade or 3 blade
 

you have your self confused.
most sub drives tend to run a smaller less of a pitch prop with the identical set up as a the surface drive.
there are also many different types of props. one which is a lifting prop which is only used in certain environments.
a five bladed prop on a sub dive would not work worth a damn. there would be way to much resistance as well heat and major amp build up on the esc and motor as well. even if the prop was small.
just for a example.
a COD ( new age crackerbox) will run a N1 setup with a P2K brushed motor on sub drive. and the prop would be a x431.
now that boat with the P2K on surface drive would run any where from a x435-y535-x635.
there are differences even though they might be minor you will still notice it in most every way possible.

RE: 2 blade or 3 blade
 

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…

RE: 2 blade or 3 blade
 

but would this work in rough water as well???