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Thread: Lifting supercubs

  1. #1

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    Lifting supercubs

    What is the most common procedure for lifting up supercubs when changing the bungee cords? Where and equiptment?

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    Jerry Gaston's Avatar
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    I use jacks that screw to the bottom engine mounts and lift the entire plane at one time but have also lifted from the top engine mounts with a strap and an engine hoist. I also have the Attlee Dodge lift rings on the top of the wings which works well.

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    FlipFlop's Avatar
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    Re: Lifting supercubs

    Quote Originally Posted by 94SUPER18
    What is the most common procedure for lifting up supercubs when changing the bungee cords? Where and equiptment?
    I used a come-a-long between the axles and supported the heavy wing with a ladder and padding...

  4. #4
    Clay Hammond's Avatar
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    Our method is similar to Cuby's. Couple guys lift up the wing at the strut attachment. Chain the gear together while you have the bungee out for replacement.

    http://www.supercub.org/phpBB2/viewt...ghlight=#17387

  5. #5
    fobjob's Avatar
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    I cut a slot in the end of a two by four so that the outer front strut fits in the slot and the tie-down is against the flat side of the 2x4, and cut to a length that lets it come down to a few inches above the floor, where a floor jack is inserted under it to lift it, the wing, and all the rest. Crude, but expedient. The slot has to be deep enough to prevent the 2x4 from slipping ! I've also used a towing strap around the upper engine mounts with the come-along previously mentioned.

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    Steve Pierce's Avatar
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    I use a prop sling and engine hoist. Tie a weight to the opposite wing I am pulling the bungee off.
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

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    No matter how you hoist it, I put chain in the same location as the hydra-sorb and lower strut. If you count and use the same number of links for each side it will sit level and is safe to roll around, with no need of something under the heavy wing.

    I personally use a cherry-picker engine hoist with a strap around the top of the engine mount.

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    Very helpful. So no problem picking up the super with an engine hoist and holding there, I was concerned that the engine lift ring was not suitable for the aircraft weight. I like the chain idea. What size chain works best and two pieces how long? Thanks.

    On line Music tip for the day. Its from Las Vegas.

    http://www.clubfmradio.com/index22.html

  9. #9

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    I hoist from the engine mount, not the lifting ring!

    Buy one piece of chain and just let a loop hang at the middle. 8' is plenty and the size doesn't have to be giant but I wouldn't use the little stuff that you'd hang a porch swing with. (Welded chain not twisted wire chain)

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    roger!

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    Jerry Gaston's Avatar
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    The engine lift ring is not strong enough to lift the entire plane so be careful.

  12. #12
    SuperCub MD's Avatar
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    Quote Originally Posted by Jerry Gaston
    The engine lift ring is not strong enough to lift the entire plane so be careful.
    You wouldn't be the first guy who tore the top off his crankcase and dropped the plane on the floor. Be careful where you tie on the engine mount if you use this method, don't bent it. Be careful lifting on the wing strut attachments, they were never meant to take that type of load.

    Best method, and the one that I use, is Atlee lift rings on a overhead chainfall with high wing aircraft jacks under the tiedowns to stabilize the plane. You can't be to careful, think of how stupid you will feel if you drop a plane.

  13. #13
    Torch's Avatar
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    Quote Originally Posted by SuperCub MD
    Quote Originally Posted by Jerry Gaston
    The engine lift ring is not strong enough to lift the entire plane so be careful.
    You wouldn't be the first guy who tore the top off his crankcase and dropped the plane on the floor. Be careful where you tie on the engine mount if you use this method, don't bent it. Be careful lifting on the wing strut attachments, they were never meant to take that type of load.

    Best method, and the one that I use, is Atlee lift rings on a overhead chainfall with high wing aircraft jacks under the tiedowns to stabilize the plane. You can't be to careful, think of how stupid you will feel if you drop a plane.

    What he said.

  14. #14
    PA12driver's Avatar
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    I built a simple wing jack 25years ago onto the 'Hi-lift' jack that is basically a pice of 2" pipe about 4-5 feet long with a clevis u welded and padded at the top. It fits between the strut attach and the strut fork and you set it at 90 degree angle to the strut. (this is the best way to do it if you don't have an overhead lift point and float attach lifting eyes) I built this for putting on and off skiis at the tie downs.

    Be sure to keep the tail and the other wing tied down. I also took a piece of 3/4 sq tube and made a solid link to replace the strut/bungee then you can set the wing back down while you are changing out the unit (one at a time)

    Tim

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    Looks like it works well, any concerns about wind? Also has anyone thought about putting the foot of the farm jack under either the fwd or rear hinge point of the gear? that way one would not have to jack as far maybe (more stable).

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    Steve would it overstress the opposite wing if one were to cinch down the tie down line on the opposite wing to hold the wing angle at 45 deg and perhaps block it up?

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    www.SkupTech.com mike mcs repair's Avatar
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    Quote Originally Posted by Clifford View Post
    Also has anyone thought about putting the foot of the farm jack under either the fwd or rear hinge point of the gear? that way one would not have to jack as far maybe (more stable).
    Dakota cub sells/gives away?? stc for a jack point under there somewhere..... someone got a link to it?

  18. #18

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    Ill contact Dakota Cub, don!t need the stc as mine is exp cub Thanks Cliff

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    mvivion's Avatar
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    And if you're going to use the lifting rings, ALWAYS use a spreader bar to avoid pulling those lift rings right together. It is VERY easy to fold those wings right up as you fold up that top deck.

    MTV

  20. #20

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    http://dakotacub.com/index.php?optio...play_id=156all all i could find, sounds like a good price though

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    www.SkupTech.com mike mcs repair's Avatar
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    Quote Originally Posted by mvivion View Post
    And if you're going to use the lifting rings, ALWAYS use a spreader bar to avoid pulling those lift rings right together. It is VERY easy to fold those wings right up as you fold up that top deck.

    MTV

    ?????? to prevent breaking the skylight.... but you really think it could hurt something????

  22. #22
    mvivion's Avatar
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    Quote Originally Posted by mike mcs repair View Post
    ?????? to prevent breaking the skylight.... but you really think it could hurt something????
    Yep, watched it done as a seiner hoisted a Cub aboard the aft deck.....no spotter for that outfit the rest of the season.

    MTV

  23. #23
    www.SkupTech.com mike mcs repair's Avatar
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    Quote Originally Posted by mvivion View Post
    Yep, watched it done as a seiner hoisted a Cub aboard the aft deck.....no spotter for that outfit the rest of the season.

    MTV
    hmmmm.. wouldn't think it possible... but ok.... floats full off water and full fuel?? hmmm...

    hmmmm ok now i get it, a SHORT cable between eyes, picked up in center..... Mine are all long cables V's.... thanks!

  24. #24
    Steve Pierce's Avatar
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    If lifting by a prop sling you can teeter tooter the airplane with two fingers. It will rest on the opposite tire with very little ballast.

    Here is the jacking lug from Dakota Cub.
    Steve Pierce

    Everybody is ignorant, only on different subjects.
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  25. #25
    skipster's Avatar
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    I just take a small jack and jack at the center of the cabane vee. I took a piece of 1/8" control cable and nicopressed 2 ends to make it the length of the shock strut. Jack it up, pull the shock strut off, put the cable in place of the strut with the same bolts and lower it.

  26. #26
    spinner2's Avatar
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    I tried to post just the picture sans words but got an error for too few words.....sounds like my wife

    Click image for larger version. 

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    "Fast is fine, but accuracy is everything." Wyatt Earp

  27. #27
    gtwingman's Avatar
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    I am in the process of installing 3" extended gear on my SC. Has anyone used the Atlee Dodge wing jacks? Looks like a simple way to lift the plane.

  28. #28

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    Lift straps(OSHA approved!) Center cluster at spar for J-3Click image for larger version. 

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  29. #29

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    As I am BETA testing a new type shock strut that has FOX shock absorbers along with bungees, I have been taking my shock struts off on and a lot lately. For my experiment, which has cub type gear, I use a Warn "Pullzall hand held" electric winch I already had laying around. I drilled two holes in the inboard lower axle socket (I have 1 1/2" hollow axles, but with the skis on they are filled with the ski mounts, otherwise I'd just run a chain or cable through them) and insert a AN-4 bolt that holds a short length of chain, that the portable winch rigs to. It is very easy to unload the gear legs to take the shock struts off (one at a time, I learned my lesson there....) as the winch has a varible speed trigger. No jacking of the wing or other lifting of the airplane required, though I used to do it that way. A regular comalong works too of course, the winch is shorter coupled and just more convinent.

    Best of all, when on the skis I now carry the short lengths of chain and 2 bolts, so now I have a good way to tow the plane forward with a rope bridle, if I ever need to/when I need to.

  30. #30
    mvivion's Avatar
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    Quote Originally Posted by mike mcs repair View Post
    hmmmm.. wouldn't think it possible... but ok.... floats full off water and full fuel?? hmmm...

    hmmmm ok now i get it, a SHORT cable between eyes, picked up in center..... Mine are all long cables V's.... thanks!
    Mike,

    No water in floats, or at least not more than usual. This airplane had the original style top deck. They used a fairly short bridle, which puts a tremendous amount of stress on that top deck. With the top deck X'd???? I dunno, but EVERY mechanic I've ever worked with lifting planes to put them on or take off floats uses a spreader bar to prevent this, on Cubs, Cessnas, and everything else.

    MTV

  31. #31
    Jim 4WF's Avatar
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    spreader bar needed due to loads at different angles
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  32. #32
    8GCBC's Avatar
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    For ACA folks...

    I would use a spreader bar too. Also, I have 35 gallons on each side which makes for some interesting lateral stability issues! Cross feeding can make the aircraft swing dangerously.



    I drain fuel to at least 0.05 (empty) before lifting on the crane for float/ski changes!
    2018 R44
    IA/A&P, ATP, SES, CFII, MEI, Rotor PPL (2500 TT)
    http://www.youtube.com/watch?v=SXI48e1heuo

  33. #33

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    Quote Originally Posted by Jim 4WF View Post
    spreader bar needed due to loads at different angles
    Looks like I'm not the only (certified) rigger here.....

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    Quote Originally Posted by gtwingman View Post
    I am in the process of installing 3" extended gear on my SC. Has anyone used the Atlee Dodge wing jacks? Looks like a simple way to lift the plane.
    Wing jack works for me. While the below picture doesn’t directly address installing gear, the jack works well during ski/wheel switching. Thanks for the tip on Atlee Dodge jack, looks worthwhile.
    In hindsight, wish I’d learned of and then bought Atlee’s jack. But I enjoy the slower and more expensive method, and instead copied a Glennallen homemade jack when needing a wing jack awhile back. While the pictured jack was made in the same configuration, the Glennallen version was made of an old bumper jack and much lighter. And Atlee’s looks wisely bolted together, ours is intentionally welded to prevent me removing the pipe contraption and taking the jack moose hunting, thus creating a slowdown in the future gear change process due to looking for the jack and the disassembled pipe contraption. I used sharpened bolts as ice studs on the base plate, the copied jack base had expanded metal tack welded on.
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    Good luck
    Dwayne
    Last edited by ER Upgrade; 02-05-2013 at 03:17 AM. Reason: Two many pictures

  35. #35
    www.SkupTech.com mike mcs repair's Avatar
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    Quote Originally Posted by Jim 4WF View Post
    spreader bar needed due to loads at different angles
    great visualization picture!

  36. #36
    Steve Pierce's Avatar
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    Works great in the bush but makes me nervous in the hanger. I use a spreader bar and chain hoist in the ceiling.

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    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  37. #37

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    I’m thinking of making a tractor jack setup like the ones pictured above. Does anyone have a close up pic of the end piece they’ve made and how that piece locks into (does it lock in? Maybe not) the tie down or won’t slip as it’s supporting the wing strut?

    I couldnt quite see and and zoom in enough on the two photos above.

    cheers
    jeff

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