Just got an OS.46AX engine and want to know what's the best prop to use on it Please express your personal experience. Have looked at charts but personal experience is better.
Thanks.

11x6 for general sport flying. 12x4 for 3d stuff. I run .46AX on a Twist with the latter prop. 11x6 when it was on Veltro.

Andy

I use an 11X5 for training students, 11X6 for sport, 11X7 for speed and a 12.25X375 on my Twist and SIG Somethin Extra for 3D

ran a 11 x 6 for a while (this was on an LT-40.....) then switched to a 12.25 x 3.75 ....and love it... not quite as fast...but that is OK..but great torque and pull...quicker take offs... and great pull while playing with acrobatics....

Same here, I used the APC 11x6, 5 & 7 for a while then tried the APC
12.25 x 3.75 on my 46fx now it's the only prop I use...

For regular sport flying, use an 11-6.

For 3D flying, normally I would say a 12-4APC or the 12.25-3.75APC, but for really fine throttle control try the 11.5-4APC. It revs up faster and gives you better, smaller corrections. Not quite as much thrust as the longer props, but I think you'll find it to be an excellent 3D prop.

Thanks guys. Will get 11X5 and 11X6

I ran the .46LA on my trainer, then reused the engine in my 4 * 40. I started out using a Master Airscrew 11 x 6. I later decided to try an APC. I put on an APC 11 x 6 and was amazed at the increase in performance. The plane was considerably faster and had much more vertical climb. The APC also caused a lot less vibration and noise. I now run a 50SX with an APC 12 x 7 and am very happy with the performance.
Scott

I second the 11.5x4 APC works great for 3d on my EF edge profile. SMOOOOTHHHH throttle response, and very quick to spool up

I have 2 of the .46 AX engines, 1 on a Big Stik 40 and 1 on a Sig Somethin' Extra. I use a
11x6 APC prop on both, tried MAS props but IMO APC is better. I'm only using the MAS props
as back ups now.

Depends on what type of model, for general sport flying I would recommend the 11 x 7 APC prop lots of revs and forward speed or the 12x6 or 7" APC proper. The 46 AX is a very powerful engine in its class.

Shaun

Hmmmm... for a .40-.46-size plane, like the Kaos 40-size, we'd run an APC 10 x 7 or 8 prop. We'd expect to see the engine turn in the mid- to high-12,000's when leaned to just rich of peak RPM on the ground.

Actually, though, if your O.S. Max .46 AX engine is turning 12,000+ RPM on the ground, and your plane flies just how you like it, then the propeller you're using is the "correct" one. The only way to be sure if you're using the "right" propeller is if the engine is turning where it should and the model flies the way you want.

For hovering and vertical climbout, you'll need lots of RPM and a flatter-pitch prop. You'll likely want the engine turning close to 13,000 RPM or slightlly higher, which means a low-pitched prop. Ed's suggestions above are good ones for 3D.

The props we tend to use suit the old-style Pattern-type flying, where you go for large smooth maneuvers, one per pass down the flight line. You'll get higher airspeeds, but don't try that with your 3D machine...it will likely get flutter and blow apart!

An OS .46 AX can't turn a 12-6 or 12-7 to save its life. Even an 11-7 is reallya bit too much for best performance, unless the model is small & clean. The AX is barely (if at all) more powerfull than a .46 FX or TT .46 Pro. An APC (or even MAS) 11-6 is a really good all-around prop for that engine, & a 12-4 APC is right on the money for 3D.

I finally got around to trying the APC 12.25 x 3.75" prop on my twist. I hate having that heavy, sharp finger mangler on my airplane, but I got to admit... it sure does haul it around nice. I don't think I lost much speed from the 12x4, but the vertical is noticably better, and I can almost get it to prop hang. (It's still nose heavy, so it won't hover just yet. Plus I'm not that good!) For safety reasons I really like having a wood prop on, but I gotta give it to that APC, it sure does work better. And you know, I can't even tell it's gray with the engine running.....


Andy

What? 11x7 or 12x7? Wow.... I really disagree with those props. if you are just sport flying the 11x6 is fine but someone (Bubba [X(]) mentioned an 11x7 for speed? Maybe on a .60! Try 10x7 or 10x8 even 9x7 or 9x8 APC for speed---

You really need to tell us what airplane you fly and how you like to fly
A 12x7 is too big for any 46 sized engine IMHO-

Looks like Britbrat has it figured out pretty well---

APC is superior in performance- IMHO