Catto prop

[gmpaul]

I need some opinions. Just thinking (which usually cost me and gets into trouble) about selling my Catto prop and getting a metal one from Vans. The Catto is a 3 blade for a 0-320 160 hp. 7/16 bolts and has around 12hr. on it. I can not seem to get the RPM up to 2750 it turns close to 2000 at altitude. Instead of me boxing a 3 blade prop up sending back and forth to Catto maybe some one with a stronger motor could use a prop and spinner. On the other hand it sure is a pretty prop I?ll see what ya?ll think.


Thanks : G.P.

[Mel]

It would help greatly if you included the diameter and pitch of the prop.

[David-aviator]

Originally Posted by gmpaul

I need some opinions. Just thinking (which usually cost me and gets into trouble) about selling my Catto prop and getting a metal one from Vans. The Catto is a 3 blade for a 0-320 160 hp. 7/16 bolts and has around 12hr. on it. I can not seem to get the RPM up to 2750 it turns close to 2000 at altitude. Instead of me boxing a 3 blade prop up sending back and forth to Catto maybe some one with a stronger motor could use a prop and spinner. On the other hand it sure is a pretty prop I?ll see what ya?ll think.


Thanks : G.P.

The metal prop from Van's may not be any different. You say the Catto is a 3 blade for a 0-320 160 hp, is your engine a 0320?

If the Catto is cut for the 0320 there is no way it will turn at just 2000 rpm in flight when attached to a 0320. If it does there is something seriously wrong with the engine. Or the tach reading is in error. What rpm does it turn static on the ground?

[gmpaul]

OK here the spec. on the engine

3-bladed wood/glass composite propeller for RV-9
66" diameter X 70 pitch
0-320 160HP@2700RPM
4.375 Finish Propeller Thickness
7" Diameter Prop flange
SAE-2 Pattern, 7/16' Bolts and 5/8' lugs
Thanks for the response G.P.

[David-aviator]

Originally Posted by gmpaul

OK here the spec. on the engine

3-bladed wood/glass composite propeller for RV-9
66" diameter X 70 pitch
0-320 160HP@2700RPM
4.375 Finish Propeller Thickness
7" Diameter Prop flange
SAE-2 Pattern, 7/16' Bolts and 5/8' lugs
Thanks for the response G.P.

The 180 HP version is 66" diameter X 74" pitch, except for 1/2" mounting hardware and 74" pitch, it is the same.

[zzapp]

I have a Sensenich 70CM6S16-0-16 with about 40 hrs.

[Dayton Murdock]

Hi G.P.
I have a catto 3 blade on my -4 ,Spec 66x72pitch with a O320E2D lyc.
I have no problem running over 2700 rpm's, Is it possible that the timing on the engine is incorrectly?

[wilddog]

Have you checked your tach?

[LOGGY]

If you do considering selling the catto ......I'm interested .....give me a call 620 755 1786

[jetjok]

Originally Posted by gmpaul

OK here the spec. on the engine

3-bladed wood/glass composite propeller for RV-9
66" diameter X 70 pitch
0-320 160HP@2700RPM
4.375 Finish Propeller Thickness
7" Diameter Prop flange
SAE-2 Pattern, 7/16' Bolts and 5/8' lugs
Thanks for the response G.P.

If you cannot get more than 2000 RPM in cruise, there is something wrong other than your prop. I would check:
1. Tachometer for accuracy
2. Ignition Timing
3. Carburetor for fuel/air leaks

How many hours on the engine since new or O/H? Has the engine recently been apart? What RPM are you getting on T/O?
Good Luck!