Page 1 of 3 123 LastLast
Results 1 to 40 of 104

Thread: Catto prop on C-90 Continental

  1. #1
    mvivion's Avatar
    Join Date
    Jun 2003
    Location
    Bozeman,MT
    Posts
    9,279
    Post Thanks / Like

    Catto prop on C-90 Continental

    Anyone running a Catto prop on a C-90 Continental, and if so, what length and pitch?

    Thanks,

    MTV
    Last edited by SJ; 09-03-2017 at 06:35 AM.

  2. #2
    Farmboy's Avatar
    Join Date
    Jan 2016
    Location
    Glens Falls, NY
    Posts
    752
    Post Thanks / Like
    Interested to hear this as well.


    Sent from my iPad using SuperCub.Org

  3. #3
    cubdriver2's Avatar
    Join Date
    Apr 2003
    Location
    upstate NY
    Posts
    7,848
    Post Thanks / Like
    Maybe reliableflier will chime in. He has one on a C90 J3. 78 or 80"

    Glenn
    "Optimism is going after Moby Dick in a rowboat and taking the tartar sauce with you!"

  4. #4

    Join Date
    Dec 2006
    Location
    Hot Springs, SD
    Posts
    346
    Post Thanks / Like
    I had one on my exp cub. 78X38. It also had c85 Pistons and Vetterman exhaust. Static rpm was 2390. 85-88 mph cruise. It climbed really well also. It was a great prop. A guy in WY has it now.

  5. #5
    Farmboy's Avatar
    Join Date
    Jan 2016
    Location
    Glens Falls, NY
    Posts
    752
    Post Thanks / Like
    Quote Originally Posted by Super11XP View Post
    I had one on my exp cub. 78X38. It also had c85 Pistons and Vetterman exhaust. Static rpm was 2390. 85-88 mph cruise. It climbed really well also. It was a great prop. A guy in WY has it now.
    What rpm did you run for cruise?



    Sent from my iPad using SuperCub.Org mobile app

  6. #6

    Join Date
    Dec 2006
    Location
    Hot Springs, SD
    Posts
    346
    Post Thanks / Like
    2300 is what I usually ran at

  7. #7
    Farmboy's Avatar
    Join Date
    Jan 2016
    Location
    Glens Falls, NY
    Posts
    752
    Post Thanks / Like
    I'll have to run mine again but it sounds just a touch less than my non-catto. At 2350 level I'm pushing 92 indicated, so I assume you probably had better climb rate. I'll also have to check my static. I have a 788 cam with open exhaust, so I could also be pumping a touch more power. Any idea what yours would do for a climb rate?

    Thanks,
    pb
    Thanks NC2252M thanked for this post

  8. #8
    cubdriver2's Avatar
    Join Date
    Apr 2003
    Location
    upstate NY
    Posts
    7,848
    Post Thanks / Like
    Quote Originally Posted by cubdriver2 View Post
    Maybe reliableflier will chime in. He has one on a C90 J3. 78 or 80"

    Glenn
    He's running a 80x34 Catto

    Glenn
    "Optimism is going after Moby Dick in a rowboat and taking the tartar sauce with you!"

  9. #9

    Join Date
    Jul 2008
    Posts
    161
    Post Thanks / Like
    I have a Catto 76x37 on an experimental PA18-95 with a stone stock C90, it was what Catto recommended a few years ago. It is currently at Catto for a repitch to 35. I could not get to the redline in cruise with full throttle, cruised about 90, with 3/4 inch gurney flaps installed, a couple of mph faster without. I never checked static. It was supposed to be shipped back last Friday, however have not heard from them. Too much snow on the runway to fly on wheels right now, we do not plow. Will post results from new pitch when able.
    Thanks Farmboy thanked for this post

  10. #10
    NC2252M's Avatar
    Join Date
    Jul 2005
    Location
    Upstate,NY
    Posts
    109
    Post Thanks / Like
    I am running a Catto 76/40 on my stroker c85. Very good t/o and climb, cruise 2150 84mph, 2350 92mph, w/o 2550 98mph. Smooth and l got ride of the extra weight. I tried a 74/36 and it didn't work as well. I am very happy so far, it has only been on this winter so I have no idea if I will like it 2up 90 deg.
    Likes cruiser, Farmboy liked this post

  11. #11
    40m's Avatar
    Join Date
    Dec 2013
    Location
    Shoreham, VT
    Posts
    233
    Post Thanks / Like
    Quote Originally Posted by sburg58 View Post
    I have a Catto 76x37 on an experimental PA18-95 with a stone stock C90, it was what Catto recommended a few years ago. It is currently at Catto for a repitch to 35. I could not get to the redline in cruise with full throttle, cruised about 90, with 3/4 inch gurney flaps installed, a couple of mph faster without. I never checked static. It was supposed to be shipped back last Friday, however have not heard from them. Too much snow on the runway to fly on wheels right now, we do not plow. Will post results from new pitch when able.
    Honest question. How do they go about repitching their prop?

    From Genesis: "And God promised men that good and obedient wives would be
    found in all corners of the earth."

    Then he made the earth round... and He laughed and laughed and laughed!

  12. #12
    NC2252M's Avatar
    Join Date
    Jul 2005
    Location
    Upstate,NY
    Posts
    109
    Post Thanks / Like
    They sand it down and can add more in some places and sand more off in others. I asked the same question.

  13. #13
    40m's Avatar
    Join Date
    Dec 2013
    Location
    Shoreham, VT
    Posts
    233
    Post Thanks / Like
    Quote Originally Posted by NC2252M View Post
    They sand it down and can add more in some places and sand more off in others. I asked the same question.
    I was sure you had. Did they quote you a price? I ask because I might like to have them re-work mine however I'm looking to increase pitch. 38 to 40

    From Genesis: "And God promised men that good and obedient wives would be
    found in all corners of the earth."

    Then he made the earth round... and He laughed and laughed and laughed!

  14. #14

    Join Date
    Jul 2008
    Posts
    161
    Post Thanks / Like
    Yes, I asked Nicole how they do it, she said they remove material from the tip inward on the back side, she said it was easy and quick. They only have to paint the back side black. They will do one re-pitch for free for the original owner. You pay shipping.

  15. #15
    NC2252M's Avatar
    Join Date
    Jul 2005
    Location
    Upstate,NY
    Posts
    109
    Post Thanks / Like
    They told me that if I was original owner and it was on the plane that I purchased it for they would repitch it for free. They are great people to work with. They built me the 74/36 and it didn't work well for me, so they said run it while we make you a new one, I told Craig what numbers I wanted to see and he hit it almost exactly. They fixed a prop off our Super cub (hanger rash) and only charged $100. Good luck. Scott...

  16. #16
    Scouter's Avatar
    Join Date
    Nov 2003
    Location
    Exeter Maine
    Posts
    1,508
    Post Thanks / Like
    Quote Originally Posted by 40m View Post
    I was sure you had. Did they quote you a price? I ask because I might like to have them re-work mine however I'm looking to increase pitch. 38 to 40

    Glenn
    I have a Sensenich ground adjust if you want to run it while yours is away

    jim

  17. #17

    Join Date
    Feb 2002
    Location
    don
    Posts
    583
    Post Thanks / Like
    They repitched mine for $300. If they said it is shipped, it,s shipped. My down time was like 3 weeks.
    Likes reliableflyer liked this post

  18. #18

    Join Date
    Oct 2006
    Location
    Seldovia, Alaska
    Posts
    99
    Post Thanks / Like
    Glenn has asked me to "Chime in". I have a c-90 on a light cub type. I put a Cato 80" x34" on it. I have been pleased with the results. Needless to say with a 34" pitch it is not fast. I cruise at about 75 unless loaded aft at about 80, at about 2350. I can get 25 at static. With an 80" prop clearance is marginal. I added Dresser aero classic 850 x 6". They weigh about 10 lbs each and add a couple of inches to prop clearance. The Cato prop replacing my metal prop took about 12 to 14 lbs off at about 50" and I compensated for it by replacing my Scott 3200 with a Matco tail wheel, removing 4 lbs or so from 205" making it a wash. I wanted to keep the CG at the same location. The Matco also lowered the tail angle and effective attack angle to assist on takeoff. The aircraft has flaps and a big tail. The flaps make it the slowest flying cub I've ever flown but it doesn't have the excess power on takeoff and climb to make use of them. Great for prospecting new strips but takeoff and climb are limited by power. I'm very pleased with the plane. The long flat prop has allowed me to squeeze every bit of power out of the engine that it is capable of.

    With a long prop the clearence is important. Cubs are often light on the nose especially when light on fuel. At slow speeds, strong brakes or excessive use of brakes can make them go on their nose or over on their back. The light Cato prop will wind up so fast, the engine power overcomes the prop inertia that it will wind up instantly and when at slow speeds if the tail starts to come up, a full power blast applied immediately with full elevator, will more likely keep the tail down and prevent a plane from going on its nose or back.

    After years of higher hp cubs I find the lack of power problematic. The long flat prop has made me able to get the most out of the 90 hp
    Thanks MainlandCub thanked for this post
    Likes Ruffair liked this post

  19. #19
    40m's Avatar
    Join Date
    Dec 2013
    Location
    Shoreham, VT
    Posts
    233
    Post Thanks / Like
    Quote Originally Posted by Scouter View Post
    Glenn
    I have a Sensenich ground adjust if you want to run it while yours is away

    jim
    Thank you.

    From Genesis: "And God promised men that good and obedient wives would be
    found in all corners of the earth."

    Then he made the earth round... and He laughed and laughed and laughed!

  20. #20
    cubdriver2's Avatar
    Join Date
    Apr 2003
    Location
    upstate NY
    Posts
    7,848
    Post Thanks / Like
    Quote Originally Posted by 40m View Post
    Thank you.
    You'll be selling the Catto if you decide to play with it

    Glenn
    "Optimism is going after Moby Dick in a rowboat and taking the tartar sauce with you!"

  21. #21

    Join Date
    Dec 2014
    Posts
    41
    Post Thanks / Like
    7636 with 10:1's. Or 7634 stock. Turns a non flapped 11 into a fire breathing animal

  22. #22

    Join Date
    Oct 2012
    Posts
    329
    Post Thanks / Like
    How much does a 76x34 cost for PA-11?

  23. #23

    Join Date
    May 2008
    Location
    Upper Peninsula of Michigan
    Posts
    290
    Post Thanks / Like
    I paid $2,935 in October for my 76x36. See invoice attached for how I set it up. This is for my experimental 11
    Attached Files Attached Files

  24. #24

    Join Date
    Oct 2012
    Posts
    329
    Post Thanks / Like
    Dan - What engine do you have on your experimental 11? Thanks!

  25. #25

    Join Date
    May 2008
    Location
    Upper Peninsula of Michigan
    Posts
    290
    Post Thanks / Like
    Dan - What engine do you have on your experimental 11? Thanks!

    O200a

  26. #26
    Farmboy's Avatar
    Join Date
    Jan 2016
    Location
    Glens Falls, NY
    Posts
    752
    Post Thanks / Like
    Quote Originally Posted by NC2252M View Post
    I am running a Catto 76/40 on my stroker c85. Very good t/o and climb, cruise 2150 84mph, 2350 92mph, w/o 2550 98mph. Smooth and l got ride of the extra weight. I tried a 74/36 and it didn't work as well. I am very happy so far, it has only been on this winter so I have no idea if I will like it 2up 90 deg.
    Dragging up this thread again. Any further comments on this pitch now that it's summer? Catto still recommends the 76/40 for the C90. What's your Aircraft weight and horsepower with it stroked?

  27. #27
    40m's Avatar
    Join Date
    Dec 2013
    Location
    Shoreham, VT
    Posts
    233
    Post Thanks / Like
    Pete sneak in during the week and pull mine off, as long as it's back on Saturday night what will I know. Catto 7638

    From Genesis: "And God promised men that good and obedient wives would be
    found in all corners of the earth."

    Then he made the earth round... and He laughed and laughed and laughed!

  28. #28
    Farmboy's Avatar
    Join Date
    Jan 2016
    Location
    Glens Falls, NY
    Posts
    752
    Post Thanks / Like
    Lol! That's not as fast and easy as it sounds Glenn! But didn't you want to bump it up to a 76/40?

  29. #29
    cubdriver2's Avatar
    Join Date
    Apr 2003
    Location
    upstate NY
    Posts
    7,848
    Post Thanks / Like
    I have been flying Stu's C90 J3 up here in Ak with a Catto 80x34. It pulls great and 2350 gives about 82mph. Took it from sea level to 6000' and I like it.



    Glenn
    Last edited by cubdriver2; 06-26-2017 at 09:37 PM.
    "Optimism is going after Moby Dick in a rowboat and taking the tartar sauce with you!"

  30. #30
    Farmboy's Avatar
    Join Date
    Jan 2016
    Location
    Glens Falls, NY
    Posts
    752
    Post Thanks / Like
    Sounds like a great borer type prop Glenn, but I can't give up the little speed I have.

  31. #31
    NC2252M's Avatar
    Join Date
    Jul 2005
    Location
    Upstate,NY
    Posts
    109
    Post Thanks / Like
    Yes I am still happy with my 76-40, it cruises a little slower than original numbers in the cold air, at 2400 2 up it is at 88-90 mph. w/o 95mph at 2550. Still very good climb. Only problem I see is I am running a lot warmer oil temps with this prop. Stroked 85, my plane is 780lbs on small tires. Good luck, Scott

  32. #32
    Farmboy's Avatar
    Join Date
    Jan 2016
    Location
    Glens Falls, NY
    Posts
    752
    Post Thanks / Like
    Interesting you are running higher oil temps. Same spinner? Do you think there is less pitch close to the hub to pressurize the cowl?


    Sent from my iPhone using SuperCub.Org

  33. #33
    NC2252M's Avatar
    Join Date
    Jul 2005
    Location
    Upstate,NY
    Posts
    109
    Post Thanks / Like
    Not sure of the reason, but I have had several props on this engine and it runs 15 deg. hotter.

  34. #34
    Farmboy's Avatar
    Join Date
    Jan 2016
    Location
    Glens Falls, NY
    Posts
    752
    Post Thanks / Like
    Quote Originally Posted by NC2252M View Post
    Not sure of the reason, but I have had several props on this engine and it runs 15 deg. hotter.
    Scott,
    Nicole mentioned Craig felt that the prop may not be loading the engine enough, and were suggesting increasing pitch to a 76/42 from the 40. Did they already do this with yours?

    Peter


    Sent from my imitation glass cockpit using SuperCub.Org mobile app

  35. #35
    NC2252M's Avatar
    Join Date
    Jul 2005
    Location
    Upstate,NY
    Posts
    109
    Post Thanks / Like
    Not yet, I have to send it back and they said they will try that, if that don't work they will try a little wider blade. I will keep you posted. I'm dragging my feet because I like my prop, they are great people to deal with.

  36. #36
    PerryB's Avatar
    Join Date
    Aug 2007
    Location
    Northern Calif.
    Posts
    1,213
    Post Thanks / Like
    Increasing the inboard blade area is probably the solution. I don't see how increasing pitch alone is going to help, if anything it'll probably run hotter.
    After Monday and Tuesday, even the calendar says WTF !
    Thanks NC2252M thanked for this post

  37. #37
    Farmboy's Avatar
    Join Date
    Jan 2016
    Location
    Glens Falls, NY
    Posts
    752
    Post Thanks / Like

    Cat to prop on C-90 Continental

    Scott, sent you a couple pm's


    Sent from my iPhone using SuperCub.Org

  38. #38
    NC2252M's Avatar
    Join Date
    Jul 2005
    Location
    Upstate,NY
    Posts
    109
    Post Thanks / Like
    Glenn, bring Peter over so he can try my Catto out. I'm taking it off next week anyhow to send back, my blade is very different, looks like a Mac. 75/35. long and thin. Scott
    Thanks Gordon Misch thanked for this post

  39. #39
    Farmboy's Avatar
    Join Date
    Jan 2016
    Location
    Glens Falls, NY
    Posts
    752
    Post Thanks / Like
    Scott, saw your message and I'm talking with Catto about it all. I think yours would still be too much prop. Glenn Symon has a 7638 I could try, which Catto is going to get back to me if it's worth getting some data from, for my 90.

    Dan Fager in Ohio has a 78x34, great for climb but cruise at 2500 is lower 80's, behind another O-200 with c85 cylinders and a 106hp output. Again, not talking C90 hp or torque curve, so it's hard to get good data without being a guinea pig.

    Thanks,
    Peter

  40. #40
    skywagon8a's Avatar
    Join Date
    Mar 2008
    Location
    SE Mass
    Posts
    7,080
    Post Thanks / Like
    Farmboy,
    Take a look at this: https://whirlwindpropellers.com/airc...oduct/ga200cn/ The ground adjustable feature will allow you to fine tune your pitch as you wish for whatever type of flying you would like. It sure seems more practical than swapping props to find the optimum pitch. I'm using the ground adjustable from the other Whirlwind company and I'm very pleased.
    N1PA

Similar Threads

  1. Constent speed prop for continental O 200a
    By dynoluc in forum Modifications
    Replies: 1
    Last Post: 08-02-2009, 05:17 AM
  2. Continental O-300 Prop Question
    By WWhunter in forum Cafe Supercub
    Replies: 3
    Last Post: 04-27-2008, 01:07 PM

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •