Can't find hardly any counter-rotating 3-blades for twin... 2-blades better?

[lt130th]

I read that three blade props yielded more speed while 2-blade give better stability, but I can't find more than one company that makes counter rotating 3-blade props in 43mm-45mm diameter (or really in any diameter). What gives?? Is a 2-blade better for twins so nobody makes 3-blades for them?

[srislash]

VXP makes pretty much any you want. Ebay it VXP propellers http://www.ebay.com/sch/i.html?_odkw...llers&_sacat=0

[srislash]

And of course the PropShop http://www.prop-shop.co.uk/ look around the site, pretty much any number of blades and pitch.

BTW I think you have the theory backwards. 3 blades a little smoother with a bit more amp draw and two blades usually a bit faster due to less friction and less amp draw as well.

[dasboata]

I have 1816/3---- L and R in stock thats 45 MM lmk thanks chris

[T.S.Davis]

Wow. That VXP has an incredible selection. Some very interesting cuts too.

Has anybody beaten on these hard to see how the alloy holds up. I've not had much luck with aluminum props but not all aluminum is created equal either.

[785boats]

I use a few of then on a twin cat & also on monos & Hydros now & then
They lose their edge or the tips when you hit a rock, turtle, stick, or another boat, just the same as the Octura, ABC, Prop Shop etc. But they are easier to fix.

[srislash]

Wow. That VXP has an incredible selection. Some very interesting cuts too.

Has anybody beaten on these hard to see how the alloy holds up. I've not had much luck with aluminum props but not all aluminum is created equal either.

I think I will try one of the funky bar cut cupped sets that match my pair of CNC 645's.This way I can compare. Just for giggles, They sure look sci-fi

[Livewire121]

@ Shawn I'm still pretty new to boating, but from what I've read is that aluminum props tend to be more likely to throw a blade on high rpm setups. So for that reason I've been more inclined to order my props in stainless steel. I'm curious as to what boat you'll be testing these props on, any chance they'll be spun on your HV Fantasm?

[Rocstar]

@ Shawn I'm still pretty new to boating, but from what I've read is that aluminum props tend to be more likely to throw a blade on high rpm setups. So for that reason I've been more inclined to order my props in stainless steel. I'm curious as to what boat you'll be testing these props on, any chance they'll be spun on your HV Fantasm?

I've spun the CNC props in high RPM, high speed applications with only one failure so far. Found a broken blade after a crash, so not sure which happened first...

[Livewire121]

Were they hardened or just raw?

[Rocstar]

Were they hardened or just raw?

Not hardened.

[srislash]

I haven't had any failures yet either though not sure if I am buzzing up as much as Joel and the SAW crew, YET!!!

The Fantasm is where I was thinking of putting them to test.

[Livewire121]

Cool I wasn't sure about using them in higher rpm setups. The info you guys provided opens up a lot of options for me other then the ss from Prop Shop.

[Rocstar]

An Octura, ABC, or Prop Shop done up by Dasboata or another pro is still the ultimate. However for sport or experimenting with different sizes the CNC wheels have worked well for me.

[lt130th]

BTW I think you have the theory backwards. 3 blades a little smoother with a bit more amp draw and two blades usually a bit faster due to less friction and less amp draw as well.

I have been looking for 3-blade prop's based solely on the idea that they would give more speed. If that's backwards then I may need to rethink. How much of a difference are we talking between 2-blade and 3-blade props. 3-blades = how much more stability than 2? 3-blades draw how much more amps than 2? 3-blade are how much slower than 2? I'm not racing this boat or competing for anything. It is purely a toy, so if the differences for each of those criteria is negligible, I'll save a few $, go with 2-bladed prop's and try my hand at balancing/sharpening.

In reference to aluminum CNC prop's failing at high RPM, if there's any risk of this I'd like to avoid the possibility ...so if I'm running two TP4060 3Y 1870kv's on 6s through a pair of Swordfish 220A's you think I'll be turning high enough RPM's to develop a problem with CNC prop's?