Hello
I have an E-Flite Eratix 3D 25e airplane.I will be usinga power 32BL Outrunner motor 770Kv anda E-Flite 60A Pro Switching BEC brushless ESC. I just purchased 4350mAh 3-cell/3S 11.1V PROLITE V2 20C LIPObattery from Thunderpower.The plane isto weigh between3.75 to 4lb with the battery installed. My question is what prop should I be using?
I purchased a APC 15x8 propbased on a recommendation from the hobby shop . I also have APC 13x6.5 prop which is one that the manual suggests. However they also reccommend a 14x7. Now I am total confussed and would like some advise on the proper propeller I should be using. This will be my first 3D airplane so I will not be doing any extreme 3D flying but would like to be able to progress into 3D flying as I become better.
Thanks in advance for your help.
Bill

I fly my Eratix with a 14 X 7 prop which is what is recommended for the Power 32.

Awesome power, unlimited vertical. Great 3D trainer. You will love it.

I forgot to mention that I use a 4-cell 3600 mah 30C pack. Nevertheless, the 3-cell pack should give you sufficient power to do most aerobatics comfortably. It's just a little sugglish when hoveringcompared to the 4-cell pack but everything else is OK. I do use a 3-cell 4400 mah 25C pack when I exhaust my two 4-cell packs.

Check what manufactorer recommend: http://www.e-fliterc.com/Products/Te...odID=EFLM4032A Seems like max 14x10 for 3S. They don`t say which propeller, but propably APC-E?

- "How to determine prop size?"
- We've created a new calculator to answer this question, called Optimal Propeller Calculator.
You can find it here: http://personal.osi.hu/fuzesisz/opc_eng/</p>