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Catto Prop certification

DW

DW

Registered User
pacific northwest
Craig Catto will have a booth at the Alaska AirmansTrade Show and will be talking about the upcoming Certification of his props. Craig's sister who works for the FAA and helping with the process will also be there to answer any questions. orders for props are coming in fast so if your thinking about one you better get in line.

DW
 

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I just got my prop from Craig, 9 lbs lighter, pulls harder, and cruises faster. He told me that it might be possible to get his prop certified on the j-3s, 90 supercubs, ect because the wording of the type certificate was more vague as far as the propeller went. As long as the prop fell into certain parameters, rpm, material type ect it may be certifyable. That would sure be great, it sure woke my plane up!
 

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I love my newest Catto! It's smooth as glass, pulls harder, and cruises faster. I'm flying the 82/41 with full Nickel Leading edge on an O-320 160hp.
 
Great prop and I wish him all the luck getting it approved. Floggin your sister works for the FAA.. not gonna sit well with others....
 
Hey Doug what kind of cruise speeds are you getting are you on 31s?
 
So what prop are they running that out performs a borer prop 41 pitch on a 150 hp cub?
 
His climb props are 84" and I think he said the 38" pitch would be a good middle of the road prop for my '12. I think the climb version is 36 or maybe less. Better to shoot him an email.
 
most around here are using 82/41 for the 0-320 and for the 0-360 I'm using the 86/38 pulls hard on the bottom and cruise low 90s
 
DW said:
most around here are using 82/41 for the 0-320 and for the 0-360 I'm using the 86/38 pulls hard on the bottom and cruise low 90s
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What kind of gains are the people with 0-320 seeing. I'm assuming there comparing to a borer prop? I would just like to get some weight off the nose of my cub and if it can out perform a b prop that's impressive, I'm not concerned with speed.
 
The Catto 8437 is a great climb prop for the 160hp. Friend of mine traded a Borer 8241 for the Catto 8437 and reports both better climb and cruise. I am running the Catto 8241 for mid 90's cruise and still lots of thrust. Hunting season sees me running the 8437 for a little less cruise but lots more thrust and climb power. I have tried all craig's props for the 0-320 from the 8436, 8437, 8438, 8241, & 8242. Each is just a little different so you just need to define performance parameters.
 
DW said:
Craig Catto will have a booth at the Alaska AirmansTrade Show and will be talking about the upcoming Certification of his props. Craig's sister who works for the FAA and helping with the process will also be there to answer any questions. orders for props are coming in fast so if your thinking about one you better get in line.

DW
Click to expand...

We will just steal yours!:lol:
 
Would be great to see the prop certified for 150-160hp Pacers also. The borer sure works great on a Pacer, and it sounds like the Catto would work better.
 
Doorgunner said:
Does Catto make a prop for the J-3 Cub? I contacted them but got no response as of yet.
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The following is from the Type Certificate data sheet A-691.
http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgMakeModel.nsf/0/ec36f12e6e139c5b8625785c006c09c8/$FILE/A-691%20Rev%2034.pdf

101. Propeller - Wood (fixed or adjustable pitch). +9 lb. (-51)

This also:
IV. - Model J3C-65, L-4H, L-4J
Propeller Limits
Static r.p.m. at maximum permissible throttle setting (No additional tolerance permitted):
(a) With A-65-1 engine: Not over 2300, not under 2000.
(b) With optional engines (Item 311C) and propeller Item 2 or 101:
Not over 2300, not under 1950.
Diameter: Not over 81 inches, not under 69.7 inches (with fixed pitch wood propeller).
Not over 74 inches, not under 72 inches (with propeller Item 2).

Entry in the aircraft log: Installed Catto model xxxx wood propeller in accordance with T.C. A-691 Item 101. Weight change negligible. signed Joe Blow 1234567 A&P.

It is a minor alteration since it is defined in the type certificate.
 
The TCDS which I posted above is current. There is no date mentioned. I am curious as to why this: (101. Propeller - Wood (fixed or adjustable pitch). +9 lb. (-51)) does not apply to all J-3s?
 
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Skywagon,
I had back and forth discussions with Craig (owner of Catto) last night concerning the possibilities of these props in LSA aircraft. The discussion is still open and I have sent him the information you posted.

His props have a wood core, so does that mean we could use them in the J-3s even with 85 and 90 hp engines?

I am not savy when it comes to props.
 
The thing that impresses me the most with the latest generation of Graig's props are how smooth they are.
 
I could see having one of these props, sure are nice. A friend on my field just got an 86" Catto for his 180hp Cub project. I looked at the invoice and was surprised it was pushing $3500 with the crush plates. So the price advantage over the McCauley 1P235 is diminished.

Update...Just to add to above. My friend included the 12" Vans spinner which Catto offers, all precut and drilled ready to use. That is nifty and a time saver! The crush plates are around $450 of the price.
 
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Doorgunner said:
Skywagon,
I had back and forth discussions with Craig (owner of Catto) last night concerning the possibilities of these props in LSA aircraft. The discussion is still open and I have sent him the information you posted.

His props have a wood core, so does that mean we could use them in the J-3s even with 85 and 90 hp engines?

I am not savy when it comes to props.
Click to expand...

Doorgunner, I have no experience with certifying different props however your question prompted me to glance through the regs a little as though I wanted to install a basically "no name" prop on a J-3. That's when I found the above data on the TCDS. item 101 is a "no name" wood prop with no limitations other than diameter and rpm. Now you have encouraged me to look further in part 35: Airworthiness Standards: Propellers. This is a three page regulation which prescribes airworthiness standards for the issue of a propeller type certificate. Par 35.39(a) addresses fixed-pitch wood propellers. The TCDS does not specify that a type certificated wood prop is required. Basically this says that you could bolt on a wood prop and fly around firewalled for 5 hours and 45 hours at 90% rpm and it would be satisfactory.

The above is my opinion based on my reading and interpretation of the regs. It does not seem like a big deal.

An LSA airplane is approved under LSA rules which are not FARs. So, that would be a different procedure.
 
Bugs66 said:
I could see having one of these props, sure are nice. A friend on my field just got an 86" Catto for his 180hp Cub project. I looked at the invoice and was surprised it was pushing $3500 with the crush plates. So the price advantage over the McCauley 1P235 is diminished.

Update...Just to add to above. My friend included the 12" Vans spinner which Catto offers, all precut and drilled ready to use. That is nifty and a time saver! The crush plates are around $450 of the price.
Click to expand...

Bugs there isn't much to the crush plate. Easy to make with a lathe and mill. They're aluminum.

Ive been running a Catto 80 x 50 for a few months now. I like it better than my original Catto. I think it was $2200. It pulls better on the low end and cruises a bit faster.
 
You only need a crush plate for the 0-320 but for the 0-360 you need the crush plate and a flange adapter because you need dowels into the prop for all 6 holes the $450 is I believe for adapter and crush plate.
 
DW said:
You only need a crush plate for the 0-320 but for the 0-360 you need the crush plate and a flange adapter because you need dowels into the prop for all 6 holes the $450 is I believe for adapter and crush plate.
Click to expand...

What's the latest on certification on these props? I wasn't able toattend the airshow so if any body no the scoop let me know?

Also will a 84 in prop be certified on a cub?
 
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