2 Blade or 3 Blade
 

I just got a carden 35% with a DA 100.whats the best prop to run on it??I might try some IMAC with it and then again i want to do some mild 3D with it ...im lost .Oh can you tell me why one is better than the other?

RE: 2 Blade or 3 Blade
 

Actually for both IMAC sequences and 3D it's not a bad idea to use one of each.

3-blade for the sequences and the 2-blade for faster spool up for 3d.

It's not uncommon to change out props for certain things

RE: 2 Blade or 3 Blade
 

Sounds like alot of work to change them all the time...

RE: 2 Blade or 3 Blade
 

Any aerodynamic advantage over the blade configuration or weight difference with spinners??

RE: 2 Blade or 3 Blade
 

It's been my experience that a 2 blade out performs a 3 blade in terms of perceived "oomph", especially when hovering or going vertical. The program "ThrustHP" that calculates static thrust for various props at a given RPM seems to bare (bear?) this out.

A 3-blade is quieter and is usually more than adequate for any modern, light-weight ship that is overpowered (like most of the 3D beasts out there today), and will earn you points for "quietness" in IMAC (or not be penalized for being too loud). Then again, I've seen (and heard) quiet 2-blades as well, but those tend to be exception rather than the rule.

I know these props aren't exactly cheap (especially the composites), but do what 90% of the pilots out there do - try both on the same ship and use the one YOU like best.

Happy New Year!

RE: 2 Blade or 3 Blade
 

Hard to go wrong with a Mejzlik 27x10 or 28x10 for both imac and 3d, or a PT 27x10 which will pull hard and yet still be a bit more quiet than the mejzlik, which with good throttle control the 27x10 or 28x10 mejzlik will still get you decent sound scores. I am not a fan of 3 blades on anything smaller than 150cc engines.

RE: 2 Blade or 3 Blade
 

What about the NX props thay any good?? are thay quiet?

RE: 2 Blade or 3 Blade
 

If I use a 3 blade which blade needs to point towards the ground when hitting compression?

RE: 2 Blade or 3 Blade
 

The NX props work pretty well, but can get loud. Menz is my favorite wood prop.

RE: 2 Blade or 3 Blade
 

I was wondering that also, and how do you clock it in case of a dead stick...do you want the blades lined up with the landing gear or with one down?

RE: 2 Blade or 3 Blade
 

I vote 2blade mejzlik 27-10 or 3blade 24-12 wide. Good luck!

Joe

RE: 2 Blade or 3 Blade
 

Mejzlik 27x10 for IMAC, because it pulls well and is not too noisy if you use throttle control in level flight. A Mejzlik 25x12 3-blade is a quieter alternative, but a lot less vertical thrust. If your plane weighs 29 lbs, the 3-blade will be doggy on hot days - expect around 5800 rpm on the ground. A Menz-S 27x10 is another alternative, pulls about the same as the Mejzlik 27x10, but will be louder. Spool up on any wooden prop makes them better for 3D. Prop pull won't be critical in Basic or Sportsman classes of IMAC.