As the subject indicates. I have a propeller question. First, the "background" info. I'm breaking in an engine. The plane is a Top Flite Elder 40. The engine is an OS 46 LA. The original props I purchased were Top Flite Power Point 11*6. I was just at the "not so local" hobby shop (long story) to pick up another 12V starter, because my other starter is at our place up in WI. Anyway, I decided to pick up some extra props for it. I did purchase an 11*6 and didn't notice when I bought them, that they're wider. Wider blade and wider in thickness. They are JZ Zinger 11*6 but it also has a "W" on it, which I'm guessing means "wide". My questions are: Does it matter that they are wider? IS it bad or OK for that engine? Are wide props specifically for a certain type of engine?
I appreciate any help/advice.
Thanks,
Joe

Yes, it does matter if the blades are wider. Wider blades have more area, and thus push more air, which puts more load on the engine.

Hi!
As Richard L. said... I fully agree...but for a sport engine like yours in an "Elder".....NO!
Just have fun! I'm certain though that a 12x4 APC will be even better for your "Elder".
Regards!
Jan K
Sweden

Thanks for the info guys! I appreciate it.
Joe

I'm using a master airscrew 12/6 on a big stick 40 and an irvine 46 engine...works great.

Wide blades are generally for 4-strokes that turn lower RPM and have more torque. 2-Strokes turn so high rpm that the blades interfere with each other. Making them narrower helps somewhat.

You can put the wide blades on a 2-stroke but you probably won't be able to turn the RPM to bring the engine up to where it has the most power unless you go to less pitch or less diameter.

Thanks for the explination CM

You're welcome.

Something I alluded to but didn't say is that all engines have a range where they develop the most power and torque. No matter what prop you choose you want the engine to be able to turn at whatever RPM that is.