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05-07-2009, 03:22 PM
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Brian DeVerter
 
Join Date: Nov 2008
Location: Snohomish, WA (near Seattle)
Age: 43
Posts: 207
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2 blade props vs. 3 blade props
What are the general rules of thumb for going from 2 blades to 3 in regards to size? I am using a 24x12 on an A60. What would be the recommended equivelant for a 3 blade?
Will I need to change anything else besides the spinner and blade? Does the amp draw change? Other than better ground clearance, are there any other advantages/disavantages of going to 3 blades? Wondering if I should try it out on a plane I am starting to build. I am just considering it because I have not used a 3 blade prop before and though I might try something new. Last edited by ChopperUp; 05-07-2009 at 06:31 PM. |
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05-08-2009, 05:51 PM
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#2 |
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Doo It! Doo It!
 Join Date: Dec 2006
Location: Ohio
Posts: 95
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Re: 2 blade props vs. 3 blade props
From what ive read, you need to go down an inch in diameter but keep the same pitch. just search it on google and youll find a bunch of people explaining it
__________________
3DHS 65" vyper, 62" osiris, 51 slick, soon to be 104" slick Extreme Flight 48 extra exp ~Proud Ohio State Buckeye~ |
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05-08-2009, 08:36 PM
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#3 |
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Bad-ass Super Contributer!
Join Date: Sep 2007
Location: Middletown, Delaware
Age: 34
Posts: 1,369
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Re: 2 blade props vs. 3 blade props
FWIW a 27X10 2 blade is supposed to be a good starting point prop for a 100cc sized engine but a 25X12 3 blade is supposed to work for a 3 blade too so I hope this helps. My 3w 106 turns up to a 28X10 2 blade and turns a 25X12 3 blade well too.
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05-08-2009, 08:41 PM
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IMAC Newbie
Join Date: Feb 2007
Location: Queen Creek, AZ
Age: 40
Posts: 245
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Re: 2 blade props vs. 3 blade props
I agree 25x12 for gas that is the way to go for a three bladed prop. But I have no clue on the electic side  ..
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