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Thread: Do 31's help the airframe

  1. #1

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    Do 31's help the airframe

    I have 26" good years on my 12. They seem to transfer a rough field landing to my seat and the airframe...a bit rough.

    I don't need 31's for the off field sort of thing I do, but I am wondering about the benefits of the 31" tires taking the punch verses the airframe?

    Is this correct thinking or do I have a stiff kink in my think?

    Thanks.

  2. #2
    RanchPilot's Avatar
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    I just put some 29s on my 12, up from 8.50s, and I think there's a huge difference in the amount of bump the tires absorb versus what is transferred through the airframe to my seat. (not that I ever bounce my landings or anything...).

    Click image for larger version. 

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  3. #3
    windy's Avatar
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    I've had 8.50's, Goodyear 26" and 31" on my -12 and there's no question that the 31" give more shock absorption than the other two tire sizes did on rough airstrips. Probably at least as important is to keep the tail up on the rollout to keep from bending the tail (ask me how I know!).
    windy

  4. #4
    Bugs66's Avatar
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    Most definitely, huge difference. I appreciate the 31's regularly.

  5. #5
    SC3CM's Avatar
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    No argument here, there is a big change going to the 31's. Make sure you run them with low enough pressure to get the most out of them though. Also, like Windy said, keep the tail up.

  6. #6
    cubdriver2's Avatar
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    The only time I think they hurt the airframe is when you let their ego take you places that your egos not ready for.

    Glenn

  7. #7
    hottshot's Avatar
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    Well said Glenn!

  8. #8

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    Quote Originally Posted by windy View Post
    i've had 8.50's, goodyear 26" and 31" on my -12 and there's no question that the 31" give more shock absorption than the other two tire sizes did on rough airstrips. Probably at least as important is to keep the tail up on the rollout to keep from bending the tail (ask me how i know!).
    Windy
    learning here. Is it more important to keep the tail up with the 31's than it is with the 26 or smaller tires? Can you explain?

  9. #9
    Tim's Avatar
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    Better to keep the tail up period, less wear and tear back there and you can see what you might hit and avoid it

  10. #10

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    Quote Originally Posted by Tim View Post
    Better to keep the tail up period, less wear and tear back there and you can see what you might hit and avoid it
    And it keeps the prop shops in business or so I'm told.
    Remember, These are the Good old Days!

  11. #11

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    8.5's to 29".....Big Difference!!!! I don't do "The Long Prop Big Rock" stuff but landing pastures and hayfield... no way will I go back

  12. #12
    Coyote Ugly's Avatar
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    No question.. Big tires are like Big Screen TV.. Bigger is always better..
    Easier on the airframe?? Naw, ya just step up to rougher places to land.. haha..
    But they sure put the fun back in flyin again...
    "Pops Dory"
    They used to say there are no old, bold pilots, Hell, looka here...

  13. #13
    PerryB's Avatar
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    These guys are crazy. 31's are the worst thing you could do to the plane. If you have them, I would take them off immediately and send them to :

    Hangar #18
    Willows-Glenn co. airport
    Willows, CA. 95988

    They will be properly disposed of. Also send talc.

  14. #14
    Gordon Misch's Avatar
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    Careful - - Ford guy puttin' forth that Willows suggestion - - -

    I agree with Pops. Kinda like buying your first 4WD pickup - gotta see how much mud or snow it can go in, and ultimately find out how much can't go in!
    Gordon

    N4328M KTDO
    My SPOT: tinyurl.com/N4328M (case sensitive)

  15. #15
    PerryB's Avatar
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    Pops is right about 31s expanding your operating environment. -- Gordon, isn't it time to get in your Dodge and head off for another psychotherapy session?

  16. #16
    Gordon Misch's Avatar
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    Still working on the last one!
    Gordon

    N4328M KTDO
    My SPOT: tinyurl.com/N4328M (case sensitive)

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