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Thread: T3 tail wheel suspension receives STC for PA18

  1. #1
    SJ's Avatar
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    T3 tail wheel suspension receives STC for PA18


    "Often Mistaken, but Never in Doubt"
    ------------------------------------------

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    Sorry to say but i wouldnt buy one of those again, i had one of the earlier versions and didnt really like the construction of it and i thought looked a LITTLE weak and i didnt even have the whole plane together at the time, so i removed it and sold it, and bought the ACME stinger. Not to mention that guy Cory has broken two of them on his Carbon Cub.
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    cubamigo's Avatar
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    Quote Originally Posted by buckchop View Post
    Sorry to say but i wouldnt buy one of those again, i had one of the earlier versions and didnt really like the construction of it and i thought looked a LITTLE weak and i didnt even have the whole plane together at the time, so i removed it and sold it, and bought the ACME stinger. Not to mention that guy Cory has broken two of them on his Carbon Cub.
    I have to thank all the guys in Alaska early on with the test suspensions I had sent them.
    They helped me develop the T3 to its current version.
    They definitely found the weak links in those first one’s years back. I was very grateful and it was much appreciated.

  4. #4
    supercrow's Avatar
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    After using, and abusing a few of your T3’s I will remain a faithful customer.
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    akavidflyer's Avatar
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    I abuse the heck outta mine and won't be without it.
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    Quote Originally Posted by buckchop View Post
    Sorry to say but i wouldnt buy one of those again, i had one of the earlier versions and didnt really like the construction of it and i thought looked a LITTLE weak and i didnt even have the whole plane together at the time, so i removed it and sold it, and bought the ACME stinger. Not to mention that guy Cory has broken two of them on his Carbon Cub.
    Well let me resay what I said the way i should have, and apologies to all and to cubamigo. I bought one, I didn’t really like it, BUT I never flew the plane with it on there and I haven’t flown a plane with a T3 on it. So i really can’t give my opinion except for by looks and a drop test from waist height in the hanger.
    As for the ACME stinger I have flow my pa12 and a friends cub with ACME stuff I loved it and guess that’s why I went the route I did.
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  7. #7

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    Quote Originally Posted by akavidflyer View Post
    I abuse the heck outta mine and won't be without it.
    Have u tried an ACME by chance? Put it thro the same hell as ur T3?
    I agree that a guy should not be with out one of the two of them. Just plane awesome.

  8. #8
    40m's Avatar
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    I would replace my T3 with another just for the benefit of it's ground handling characteristics.

    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!

  9. #9
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    Quote Originally Posted by buckchop View Post
    Sorry to say but i wouldnt buy one of those again, i had one of the earlier versions and didnt really like the construction of it and i thought looked a LITTLE weak and i didnt even have the whole plane together at the time, so i removed it and sold it, and bought the ACME stinger. Not to mention that guy Cory has broken two of them on his Carbon Cub.
    Just looked up the numbers: 3,426 landings for students learning tailwheel in my Legend Cub with an API 6131 and a T3 shock. Never any damage to the tailwheel or the T3…despite their best efforts.
    Daryl Hickman, ATP, CFI, XYZ, PDQ
    N452SP 2015 American Legend Cub
    N73TZ 1951 Cessna Bird Dog
    http://www.CubFlying.com

  10. #10
    Bearhawk Builder's Avatar
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    Congrats Dan, it's been a long road for you!

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    Quote Originally Posted by CubCruiser View Post
    Just looked up the numbers: 3,426 landings for students learning tailwheel in my Legend Cub with an API 6131 and a T3 shock. Never any damage to the tailwheel or the T3…despite their best efforts.
    I have the same setup and mines one of the first T3s out there

    Glenn
    "Optimism is going after Moby Dick in a rowboat and taking the tartar sauce with you!"
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  12. #12
    Tim's Avatar
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    like Glenn, I've have an early one, and landed on the usually places, smooth grass, sandy bars, bars with small rocks some a little bigger rocks, farm fields, etc. so far so good

  13. #13
    Rick Papp's Avatar
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    As many of you here now I tend to be a little hard on equipment. Recently, While taxiing for a turn to take off, I put the tail wheel in a Hidden groundhog hole in the hayfield. It nearly stopped the airplane on the turn. I thought for sure I was in big trouble. Got out and inspected the tail wheel. It was dirty, but absolutely no damage. I love this tail wheel, and would not leave home without it! Rick
    Never stay level!!!!!
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    Are there honest numbers out there somewhere for weight addition over standard stack of springs?

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    So is that a 3 or 4 stack and how wide. Cub springs are all over the board. The T3 is listed at 5.2 lbs.
    DENNY
    EDIT: That weight is for the single shock version Nanook is correct 6.6 for the double shock.
    Last edited by DENNY; 09-20-2023 at 12:18 PM.
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  16. #16
    Steve Pierce's Avatar
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    4 leaf stock Piper tail spring set with attach bracket and spacer 4.34 lbs
    4 leaf Pawnee spring weighs 6 lb. .5 oz.
    3 leaf AK Bushwheel spring weighs 5 lb. 10.9 ounces

    Steve Pierce

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    WWhunter's Avatar
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    I've had a T-3 on My Murphy Rebel for at least a year. Made a world of difference over the leaf spring type. Where the leaf spring was noisy and bouncy, the T-3 is a gentler ride and hard to even notice when I do a tail first landing. Sure is much better on the airframe than the old leaf spring.
    Don't take life too seriously ... no one gets out alive!
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  18. #18
    nanook's Avatar
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    Airframes Inc., says it weighs 6.6lbs…$1000.00
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  19. #19
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    Supercub.org members discount available. Please message me for your order code.
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  20. #20

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    Do you have a discount for the Ti spring?

    After removing as much weight firewall forward the carbon prop made my cub tail heavy when loaded.

    The Ti spring made a big difference ( tried a friends ) 4 pounds on the tail is 25 pounds in the aft baggage.

    And it is a lot smoother than the AF heavy cub spring.

    A discount on that price would sure be nice $$$ ouch
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  21. #21
    cubamigo's Avatar
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    Quote Originally Posted by Dog View Post
    Do you have a discount for the Ti spring?

    After removing as much weight firewall forward the carbon prop made my cub tail heavy when loaded.

    The Ti spring made a big difference ( tried a friends ) 4 pounds on the tail is 25 pounds in the aft baggage.

    And it is a lot smoother than the AF heavy cub spring.

    A discount on that price would sure be nice $$$ ouch

    Your right. A well balanced cub is the most enjoyable machine to fly.
    If you are running a stock cub with the lead acid battery in its original location and original prop, you likely cannot afford tail weight.
    Many cubs have been modified with under seat battery, extended baggage, 180hp engines, relocated oil cooler, constant speed or borer prop and bush wheels to name a few.
    Finding the correct balance for your individual aircraft may require adjustments. Like a light tail spring and tailwheel or a heavier Baby Bushwheel .
    Power to weight ratio in a light cub is great with a well balanced airframe.

  22. #22
    Formandfunction's Avatar
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    Quote Originally Posted by cubamigo View Post
    Supercub.org members discount available. Please message me for your order code.
    Is that order for any tailwheel or just the single spring cub?

  23. #23
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    Quote Originally Posted by Formandfunction View Post
    Is that order for any tailwheel or just the single spring cub?
    STCd T3 Tailwheel Suspension


    My email is
    supercubsnorth@gmail.com

  24. #24
    JB's Avatar
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    What is the weight difference between the stinger and T3

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    Quote Originally Posted by DENNY View Post
    So is that a 3 or 4 stack and how wide. Cub springs are all over the board. The T3 is listed at 5.2 lbs.
    DENNY
    EDIT: That weight is for the single shock version Nanook is correct 6.6 for the double shock.
    The original leaf spring setup includes a mounting clamp, two bolts nuts and washers along with the rear tailwheel spacer. They are not needed with the T3 dual shock.
    .5 lbs
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  26. #26

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    Quote Originally Posted by JB View Post
    What is the weight difference between the stinger and T3
    ACME stinger weighs 7.3lbs
    T3 is 6.6lbs
    Last edited by buckchop; 11-05-2023 at 11:06 AM.

  27. #27
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    Alaska Gear company tailwheel springs drop testing
    https://youtu.be/7RziHxEF-co?si=zB09hhoaW-au5Lxe

  28. #28
    Steve Pierce's Avatar
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    Interesting. Glad they finally got the tailspring approved. Interesting to see the T3 just hit and stop. How much does the T3 raise the tail over the PA18 spring?
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  29. #29
    cubamigo's Avatar
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    Quote Originally Posted by Steve Pierce View Post
    Interesting. Glad they finally got the tailspring approved. Interesting to see the T3 just hit and stop. How much does the T3 raise the tail over the PA18 spring?
    The T3 normally does not raise the tail. If you have a weak leaf spring set, installing the T3 will return the height to the position a new leaf spring set would be.

  30. #30
    Steve Pierce's Avatar
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    Quote Originally Posted by cubamigo View Post
    The T3 normally does not raise the tail. If you have a weak leaf spring set, installing the T3 will return the height to the position a new leaf spring set would be.
    Did something change in the set up? Seems like the ones I was around raised the tail a bit.
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  31. #31
    cubamigo's Avatar
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    Quote Originally Posted by Steve Pierce View Post
    Did something change in the set up? Seems like the ones I was around raised the tail a bit.
    Four years ago we did make a geometry change that corrected the raised tail. It was only the single shock T3 that needed the change.
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  32. #32
    JB's Avatar
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    What is the process to tell if your spring is still at the correct arc?

    interesting how the titanium spring reacted in the drop test compared to the steel. Not sure its a good thing.

  33. #33
    Steve Pierce's Avatar
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    Here is an article my Dad wrote on tailwheel shimmy that has a picture of the proper arch .
    https://drive.google.com/file/d/1RBB...w?usp=drivesdk
    Steve Pierce

    Everybody is ignorant, only on different subjects.
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  34. #34

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    Quote Originally Posted by Steve Pierce View Post
    Here is an article my Dad wrote on tailwheel shimmy that has a picture of the proper arch .
    https://drive.google.com/file/d/1RBB...w?usp=drivesdk
    This is the best explanation of the proper caster angle I have seen. If you do a search someone posted a diagram of the arch somewhere. I made one off a new spring and keep it on my press for yearly re-arch. Load your plane up with fuel and two people when you are looking at the tailwheel so you know what is looks like with a load. Mine looked fine empty and I had no issues but I let a relative get his tailwheel endorsement in my cub he and the CFI kept saying the steering was bad. I of course told them they spent too much time in nose wheel aircraft and did not know how to properly handle a real plane. But I did walk back and look at the caster angle with them in the plane and full fuel it was obviously wrong. So quick to the the press and all was well.
    DENNY

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