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08-22-2009, 03:21 PM
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Join Date: Aug 2009
Location: Campina Grande, PB - Brazil
Posts: 1
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Propeller
Hi everyone, my name is Rodolfo Dantas, i am a Brazillian which is building a RV10 in Brazil. For this reason, i would like to know which is the best suitable option for the light plane because i am wondering about two blades or three blades. So, wheter someone could help me about the best choice for the light plane, i will be so glad.
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08-22-2009, 04:33 PM
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Join Date: Jun 2006
Location: Anthem, Az
Posts: 168
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Its a trade off
Rodolofo
The answer to your question lies in how you value certain items.
Price: generally the 2 blade is less expensive
Performance: The 2 blade will cruise faster than most 3 blade propellers, Exactly how much is debateable, but likely somewhere between 2-9 kts. The 3 blade will climb better
Vibration: The 3 blade will operate smoother than the blades and be quieter.
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08-22-2009, 04:35 PM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,408
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Welcome to VAF!!!!
Rodolfo, welcome to VAF.
Good to have you here.
As a rule, the two blade props tend to be a knot or two faster, and the three blade ones are reported as "smoother"
Hope this helps.
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010 
Phase 1 done, 2/4/2011
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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08-23-2009, 05:47 AM
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Join Date: Jan 2005
Location: Louisville, Ga
Posts: 7,840
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Welcome, Rodolfo...
...to VAF.
The three-bladed prop also makes the cowling difficult to remove/replace because you always will have two blades angled down....I have one.
Welcome,
__________________
Pierre Smith
RV-10, 510 TT
RV6A (Sojourner) 180 HP, Catto 3 Bl (502Hrs), gone...and already missed
Air Tractor AT 502B PT 6-15 Sold
Air Tractor 402 PT-6-20 Sold
EAA Flight Advisor/CFI/Tech Counselor
Louisville, Ga
It's never skill or craftsmanship that completes airplanes, it's the will to do so,
Patrick Kenny, EAA 275132
Dues gladly paid!
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08-23-2009, 07:06 AM
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Join Date: Oct 2005
Location: Savannah, GA
Posts: 1,849
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Quote:
Originally Posted by Deems Davis
Rodolofo
The answer to your question lies in how you value certain items.
Price: generally the 2 blade is less expensive
Performance: The 2 blade will cruise faster than most 3 blade propellers, Exactly how much is debateable, but likely somewhere between 2-9 kts. The 3 blade will climb better
Vibration: The 3 blade will operate smoother than the blades and be quieter.
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There's your answer. I flew side by side with a two bladed prop, I have a three bladed and more horse-power, and the two bladed is faster. So you have to ask yourself are you flying out of hilly, high DA airports on short distances or do you want to cruise long distances faster.
__________________
Todd
N110TD
RV-10 Vesta V8 LS2/BMA EFIS/One formerly flying at 3J1 Hobbs stopped at 150 hours
Savannah, GA and Ridgeland, SC
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08-23-2009, 08:00 AM
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Join Date: Nov 2006
Location: Waco, Texas
Posts: 1,658
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How much faster do you think they were Todd?
I'm intrested in learning more about the engine setups, loading, MP vs RPM in each bird.
Thanks!
Phil
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08-24-2009, 03:05 PM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,408
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Bit of new info, just posted.
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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08-24-2009, 05:56 PM
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Join Date: May 2008
Location: Brisbane Qld. Aust.
Posts: 2,271
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