Catto prop - Page 2

gmpaul · #11 08-28-2009, 10:43 AM

Let me see if I can answer some questions
I have not checked static RPM but full throttle gives me 135 kts. Which make me think the tac. is ok.
The timing has been checked along with checking to see if the right gear ring was correct.
70CM6S16-0-16 ? pitch

I still have to eliminate the engine before selling or swapping props.
The engine has 80 hours
A friend called: Said He believes he has located a prop I can borrow to static check the engine. Wow ain't RV'ers GREAT!

Thanks again G.P.

hydroguy2 · #12 08-28-2009, 11:36 AM

do you have all the wheelpants and fairings in place?

zzapp · #13 08-28-2009, 11:56 AM

Quote:

Originally Posted by gmpaul

Let me see if I can answer some questions
I have not checked static RPM but full throttle gives me 135 kts. Which make me think the tac. is ok.
The timing has been checked along with checking to see if the right gear ring was correct.
70CM6S16-0-16 ? pitch

I still have to eliminate the engine before selling or swapping props.
The engine has 80 hours
A friend called: Said He believes he has located a prop I can borrow to static check the engine. Wow ain't RV'ers GREAT!

Thanks again G.P.

That would be a 79 inch pitch ( sent a pm ).

Steve Brown · #14 08-28-2009, 01:32 PM

I can get 2200 static RPM with my 3 blade catto near sea level and have no problem getting to 2700 RPM up to around 10,000+ feet.

FYI: I have a new Catto on order so I can turn 2700 RPM up to about 19,000 DA

Once I fly off the hours on the new one, I might be will to part with the old one. If anyone is interested.

gvgoff99 · #15 08-28-2009, 02:02 PM

Quote:

Originally Posted by gmpaul

Let me see if I can answer some questions
I have not checked static RPM but full throttle gives me 135 kts. Which make me think the tac. is ok.
The timing has been checked along with checking to see if the right gear ring was correct.
70CM6S16-0-16 ? pitch

I still have to eliminate the engine before selling or swapping props.
The engine has 80 hours
A friend called: Said He believes he has located a prop I can borrow to static check the engine. Wow ain't RV'ers GREAT!

Thanks again G.P.

G.P. I fly out of Houston SW (AXH) and am pretty close to you. I plan to fly to Brazoria tomorrow for food and fuel. I also have one of those neat little portable tachs and would be willing to meet you in Brazoria so that you may use it to check your tach static and in flight. You would find out real quickly if your tach is registering the correct RPM.

N941WR · #16 08-28-2009, 02:21 PM

Quote:

Originally Posted by Steve Brown

I can get 2200 static RPM with my 3 blade catto near sea level and have no problem getting to 2700 RPM up to around 10,000+ feet.

FYI: I have a new Catto on order so I can turn 2700 RPM up to about 19,000 DA

Once I fly off the hours on the new one, I might be will to part with the old one. If anyone is interested.

Steve,

That is going to be one heck of a climb prop!

It sounds to me like you might be RPM limited down low, as I was.

At 10K DA I could only run 64% power on the red line. I never did try it up highter.

Steve Brown · #17 08-29-2009, 04:58 PM

Quote:

Originally Posted by N941WR

Steve,

That is going to be one heck of a climb prop!

It sounds to me like you might be RPM limited down low, as I was........

I expect to loose about 5+kts cruise down low because I'm not going over 2700 RPM, but I never use it anyway. I tend to cruise around in the low 150s LOP.

I expect better takeoff & climb, better air braking (unfortunately less glide as well) and gain close to an extra 5+kts up high.

My pitch will be very low, 66. Catto says that the prop should have "negative angle of attack in the transonic range". He is expecting "top speed" at 2700 RPM to be between 156kts and 160kts down low. Up high I'll get less at 2700 RPM.

I took some cruise test data on my current prop so Catto would know where we were starting. Once I get the new one on and tested I'll post the differences.

Unfortunately comparisons of takeoff and climb will be anecdotal since I've never really taken hard data.

dcas80 · #18 10-14-2009, 06:22 PM

Greg, I just purchased an RV-7 with O-320/160 HP
Saw your ad on your catto prop and was wondering if it is still available and how much? 434-296-7434 Tim/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.[/quote]

dcas80 · #19 10-14-2009, 06:34 PM

Steve, I recently purchased an RV-7 with An O-320- 160 and was wondering if you decided to sell your older Catto 3 blade? 434-296-7434 Tim

gmpaul · #20 10-14-2009, 08:46 PM

I sent my prop back to Catto and he checked it out and even put it on a friend's RV-6. The prop checked out great. This is not what I wanted to hear, meaning I had engine problems. After much fretting, checking, and a few bad words...I don't even know what they mean, I found the problem. It seems that when I had an alternator go out on me a while back it must have spiked my EFIS. All my data stayed in place but my parameters defaulted back to factory settings. There is a lot more to this story but basically there are some problems that are so obvious you can't see them. By the way Catto didn't charge me a dime, even for my mistakes-what a great GUY!

GP