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Thread: Catto Prop Information

  1. #41

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    Quote Originally Posted by DW View Post
    Sageelite if your purpose is STOL as you say then go with 86X38 I also think the 86X40 would be a good choice you will only lose a few feet on take off with the 40" literally just a couple of feet and you will pick up a couple miles an hour maybe more on the other end both good choices but the 44 inch is just too much bite.
    I had make a call to Nicole reduce 44 to 40 this morning,good sevice Catto.

  2. #42
    Colorguns's Avatar
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    Are there any field approvals out there for a Catto on a PA12 0-360?

  3. #43
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    I doubt if you're going to find anyone that will field approve an experimental prop on a certified plane ......the STC process is still in the works at Catto but as usual it with the FAA it takes time.

  4. #44

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    Quote Originally Posted by Colorguns View Post
    Are there any field approvals out there for a Catto on a PA12 0-360?
    DW you seem connected, any chance can you find out if certification it is actually (really and truly) in the works?
    Remember, These are the Good old Days!

  5. #45
    DW's Avatar
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    Hey Kirby yes it is but like anyone that has a successful product he's up to his ass in alligators but chipping away at it.

  6. #46

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    Quote Originally Posted by DW View Post
    Hey Kirby yes it is but like anyone that has a successful product he's up to his ass in alligators but chipping away at it.
    I'd love to be the first customer!
    Remember, These are the Good old Days!

  7. #47
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    Quote Originally Posted by OLDCROWE View Post
    I'd love to be the first customer!
    No way!! Me and DW go way back and he will pull some strings to bump you off #1 on the list.


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  8. #48

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    Quote Originally Posted by SteveE View Post
    No way!! Me and DW go way back and he will pull some strings to bump you off #1 on the list.


    Sent from my iPhone using Tapatalk
    After he hauled that junk frame of yours home thinking he actually got something... welcome to last in line.
    Last edited by OLDCROWE; 11-20-2014 at 06:50 AM.
    Remember, These are the Good old Days!

  9. #49
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    If you both send me all your money I'll see what I can do....Right after I get back from the Caribbean...

  10. #50
    C-GZUP Jorfarms's Avatar
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    This is an old thread but I have a question. I have an 86*38 and I’m looking for a 84*42. If I can find one I have mine for sale
    The bad news is time flies. The good news is that your the pilot.

  11. #51
    Olibuilt's Avatar
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    Why do you want to change prop, if it is ok to ask ?

  12. #52
    gdafoe's Avatar
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    I have a 84x41 available


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    Gerald

  13. #53
    C-GZUP Jorfarms's Avatar
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    I’m on floats all the time and would like to get a little more speed out of it. I can afford to give up some on takeoff for it jumps off the water fairly fast and my runway is now longer. Talked to Nicole at Catto and they can twist my prop 3 degrees so I’m thinking I’ll go that route. To bad Arizona wasn’t a little closer to try gdafoes prop out.
    correction she told me inches not degrees
    Last edited by Jorfarms; 04-24-2020 at 09:33 AM.
    The bad news is time flies. The good news is that your the pilot.

  14. #54
    39-J3's Avatar
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    Anyone running a CATTO on an 0-200? If so what are you seeing for numbers?

    Larry.

  15. #55
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    they can twist my prop 3 degrees

    Degrees or inches? It's odd that she'd give you a number in degrees when the prop is rated in inches. Also I think it's a re-contour/re-finish process. That's a wood core prop, and not twistable like aluminum.
    Last edited by PerryB; 04-22-2020 at 10:38 AM.
    After Monday and Tuesday, even the calendar says WTF !

  16. #56

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    Quote Originally Posted by 39-J3 View Post
    Anyone running a CATTO on an 0-200? If so what are you seeing for numbers?

    Larry.
    I have a CATTO 76X42 on my Sport Cub S2HP. Love the performance. 1,000 FPM+ when heavy at sea level and will do almost 120mph at 2750 rpm flat out With 26” tires. Normal cruise is 105-110 tas at 2450-2500. The engine was done by Lycon and is 10:1 compression ratio with port and polish and I think it has a C90 cam. If you’re stock I think CATTO makes a few others with a little less pitch. I just flew the new sensenich ground adjustable 76” on a similar cub and the way it was pitched it definitely climbed better but was not as fast. I think the CATTO was also smoother but waiting to balance the sensenich before I fully commit to that.
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  17. #57
    Doug Budd's Avatar
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    I have a 78x37 Catto on my cub with a 0-200 that has c85 pistons and a after market cam ( close to the old c90 cam )
    I like it works great. I put it on the stock 0-200 to see how it would preform and it couldn’t turn it very good. Not enough hp.


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  18. #58
    Farmboy's Avatar
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    Similar to Dougs experience.

    I tried what was labeled a 7638, but actually signed off in sharpie on the inside bore as a 7637. It worked okay on the Sport Cub O-200 with 10:1 pistons, but my C90 with the 988 cam would just not spin it enough. Just not enough horsepower.

    Interesting phenomenon with this prop on the c90. Consistently after 40-45 seconds of level flight (and trimming to get least drag) it would surge forward just a touch and run 5 mph faster. Almost like the wing finally got on step and the prop shifted up a gear. After noticing this I repeated it multiple times and every time it did the same thing.

    But still performed poorly on the 90. Climb and overall was obviously the wrong prop for the power.

    Pb

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  19. #59
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    Catto Prop Information

    Side note, before trying the above 7638/7, Nicole had spec’d me a 7640, and then shipped me a 7642. Prop turned 2000 rpm WFO.

    Huge waste of time and money.

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  20. #60
    Doug Budd's Avatar
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    I have a Mac 74-38 that on the modified 0-200 gets me off the ground a little faster but my airspeed isn’t very good. The Catto is 10mph faster and I get off almost as short. I thought about having them repitch it to a 36 but decided to keep it the same. Hard to go anywhere at 65 to 70 mph

  21. #61
    C-GZUP Jorfarms's Avatar
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    Nicole told me inches but also said that it wouldn’t work on mine for my prop is to thick. With a higher pitch you get a thinner blade thus giving you a higher static rpm. If I just increased the inches from 38 to 41 I would loose to much on the static rpm with my prop. I’m really leaning towards a Whirlwind that way one prop maybe does all just my thoughts and most likely their sales pitch.
    The bad news is time flies. The good news is that your the pilot.

  22. #62
    Doug Budd's Avatar
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    The Ground Adjustable sensenich kind of intrigues me a little various threads on here with the information on them


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  23. #63
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    Doug, in case you want more images -

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  24. #64
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    And one more just for April.

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  25. #65
    Doug Budd's Avatar
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    How do you like it? And what is the length of it? I think the whirlwind for the o200 is only 72” that kind of broke the deal for me.

  26. #66
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    Catto Prop Information

    Doug, on my C90? I thought I explained that a few posts back but I loved it. 76” worked great. I did struggle with higher engine temps but once I opened up the lower cowl that was solved. (Rich had the same temp increase on a Catto, but chose to send it back rather than look for cooling)

    That’s the one I wrecked so I no longer have either.


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  27. #67

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    On a stock c90/0-200 you want a 7636 for off ground performance. No coarser. 7634 would be even better. Up it to 78” and flatten it a touch more. I ran a 7636 on a c90 with 9.5:1 pistons and it did well. Also ran it before the pistons when it was stock. The bump from 7:1-9.5:1 was substantial in rpm increase. Hence the 34 when stock. Hook up to a scale Catto vs ground adjustable. I think you’ll be surprised at what you’ll have to pitch the adjustable to, to out pull/pull the same as a properly pitched/length Catto. People get discouraged when they look at the tach after putting the hammer down. Catto pulls hard at a lower rpm compared to metals. No free lunch. You want good take off in a small cub, your going to get passed by birds. The 74” or 75” Mac pitched flat I’ve heard is a dandy as well..
    Last edited by hunt/trapak88; 04-25-2020 at 11:18 AM.
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