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props make a difference - 11/22/2012 4:49 PM   
suzonka


 

Posts: 786
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From: calverton Long Island, NY, USA
Status: offline 		41" edge requires an 11x5 prop,on order ,so I had a 3 blade 10x6 and used that, because I wanted to test fly the new plane , it flew well , the motor is rated for 40 amps max burst, with a 2200 lipo pack battery. it flew great, what I need to know can I continue to use this prop with 3 blades or will it pull less or more amps that the 11x5 prop?

http://www.3dhobbyshop.com/41-Edge-5...e_p_14908.html

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RE: props make a difference - 11/24/2012 12:36 AM   
chuckk2


 

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From: Warner Robins, GA, USA
Status: offline 		You might use E-Calc to see the difference.
The two blade should be a bit more efficient.
A problem with E-Calc might be that the constant? for the three blade is not the same as your prop.
Where I'm at the three blade props are usually Master Airscrew, and the two blade props I use are APC E.
The Master Airscrew props were not specifically listed, so I ended up using the default constant.
12x6x3 seems to be the more common three blade size for my electric planes.
Since you didn't let any of the "magic smoke" out, you are likely OK.
 


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RE: props make a difference - 11/24/2012 7:18 AM   
suzonka


 

Posts: 786
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Joined: 11/22/2004
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From: calverton Long Island, NY, USA
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quote:

ORIGINAL: chuckk2

You might use E-Calc to see the difference.
The two blade should be a bit more efficient.
A problem with E-Calc might be that the constant? for the three blade is not the same as your prop.
Where I'm at the three blade props are usually Master Airscrew, and the two blade props I use are APC E.
The Master Airscrew props were not specifically listed, so I ended up using the default constant.
12x6x3 seems to be the more common three blade size for my electric planes.
Since you didn't let any of the ''magic smoke'' out, you are likely OK.
 


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thanks a lot for the information , I hear if you change from a 2 blade to a 3 blade , either go down 1 " in Dia size , or stay the same Dia and go down 1 pitch size, so what I did is went from an 2 blade 11x5 to a 3 blade 10x6 and figured it should be about the same with more ground clearance? what do you think , I just don't want to over heat the motor but it seems cool ? to

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RE: props make a difference - 11/24/2012 7:23 AM   
suzonka


 

Posts: 786
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Status: offline 		images of propellers

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