Breaking-in a OS Max 55ax
 

Hi,

I would like to know which propeller to use, because OS doesn't recommend any propeller size for the break-in, only this:
Sport 12X7-8, 13X 6-7

Can I use an APC 12X6 or what?

Thanks

SDG666

RE: Breaking-in a OS Max 55ax
 

I used a Graupner 12x7 for break-in and flying

RE: Breaking-in a OS Max 55ax
 

Is there anything "touchy" for the tunning and breaking-in with that engine that I most know?

RE: Breaking-in a OS Max 55ax
 

Nope

RE: Breaking-in a OS Max 55ax
 

Set it rich, make sure it's reliable, and go fly it. I'm not a real proponent of extended break-ins on the ground. OS engines are known for their ease of use and relatively quick break in times.

RE: Breaking-in a OS Max 55ax
 

They say to use the prop you are going to fly with. Also, most "break-in props" are smaller than the ones you would use for flight, so you will be just fine.

Engine is a breeze to start and tune; have fun with it!

RE: Breaking-in a OS Max 55ax
 

The 12X6 will work just fine.
A question for gaRC. How would someone know what prop they are going to fly with??
Just wondering??

RE: Breaking-in a OS Max 55ax
 

I don't know, it's just what the manual says:eek:

For my new 55AX, I know I've been enjoying 5pitch props on my previous planes with the 46, so I went to a larger prop diameter with the same pitch for the bigger engine. I imagine this will give me a bit more pull without increasing my speed too much. But of course I'll have to try it and see what happens. I also bought a 12x6 as I heard the plane flies well with that setup.

RE: Breaking-in a OS Max 55ax
 

Yep and that's why I have so many props these days. Trying an odd ball prop has often given me some wonderful surprises. I spend A lot of time with A new plane changing props.
I like A lot of pull with the slowest speed I can find so I have A lot of low pitched props, even been trying out some of the 3-D props I have never used before and found I liked some of them.
I have been nipping off the tips of A few too, I'm having A ground clearence problem on A couple of planes, if I bounce on that three point they get just A bit shorter.;)