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Rank: Advanced Member
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Hi everyone, My new AC200 (Kynningsrud livery) has limp boom. When fully extended it droops. Anyone else have this issue with their AC200 or am I alone on an island here? Any fixes? (all Viagra suggestions will be ignored!)  Namaste, Bug
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You can order a YCC cylinder. Possibly that will help? Jake
 "Building the future!"
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when you say it droops
meaning the boom looks like an elongated banana from a few paces back
or does it eventually drop boom down
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JakeDaSnake wrote:You can order a YCC cylinder. Possibly that will help?
Jake hehe, he said "order"!! YCC PartsThere isn't one listed for the AC-200 however I'm sure the one for the LTM-1200 may. I wish DHS would carry these parts... CHUCK Will we ever see YCC parts through DHS?
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Maybe someone from this board could custom make a cylinder that locks in place.
My .02 worth.
Michael
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Unusual for the AC200. This particular model in all the liveries I have requires two hands to get the boom up or down. If YCC does not offer a replacement, then the drill the dole and put a pin though option is the second best bet to keep it locked in place. Simply drill a small hole through both the plastic cylinder and the metal ram in the desired position and insert a small brad nail, trimmed to the correct length. The boom will be locked in place and can never come down. How do you like the Kynningsrud livery-it is currently the only one of the AC200 liveries I do not own. Can you post some pictures?
Bob Bobs CranesCome Over To The Lift Side . . . . . . . We Have Cookies!!!!
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Hi Guys, Crane Op, YCC do a cylinder for the AC-200 part# YC864   Hope that helps. Steve.
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The simplest fix is to wrap the cylinder shaft with a piece of plastic tubing or a half section of brass.
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Easy Fix: Get a piece of clear vinyl tubing from Home Depot or local hardware store. Slit it down the length of the tube, and slip it on the cylinder. Best Fix: YCC Cylinder upgrade. You must paint it and take the crane apart to install it.
If you learn from your own mistakes, then I am a genius !!! Jeepin-Paul Website
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Not cylinder bleed, boom droop. It also lists to the left, meaning that the hook line runs to the left of center of the boom. Bob, I particulalrly like it for the fuschia color; not many cranes out there that are green. Lucky you that you have the others, quite a collection of some really fine looking cranes. I would love to have the Schmidbauer version! Here are some pics of the "droopy list":   I tried to reference the hook line in the 2nd photo but it's not very clear. If you look closely in the 1st pic you can see the hook line doesn't even come close to running up the back of the boom. *This is with the boom pulley located as far right as possible* Still wondering if anyone else has this problem? Namaste, Bug
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gabugman wrote:Not cylinder bleed, boom droop. It also lists to the left, meaning that the hook line runs to the left of center of the boom. Bob, the Kynningsrud is fantastic, I particulalrly like it for the fuschia color; not many cranes out there that are green. Other than the issue with the boom, the quality is good. Lucky you that you have the others, quite a collection of some really fine looking cranes. I would love to have the Schmidbauer version! Here are some pics of the "droopy list": I tried to reference the hook line in the 2nd photo but it's not very clear. If you look closely in the 1st pic you can see the hook line doesn't even come close to running up the back of the boom. *This is with the boom pulley located as far right as possible* Still wondering if anyone else has this problem? Namaste, Bug just to clarify ,the technical term in the real world is deflection . unlike the real crane the model is not equipped with wear pads to align the sections ,if you want to play a little with some green paper to stuff in between the sections to align everything by all means have at it but it is normal for the boom to bend under load ,occasionally when working in breezy conditions it well bend down under load and sideways from the wind.It can actually be a dangerous condition in the real world ,not so much in or hobby
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 Even the real thing does it  Regards Andy
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YEAH BABY !!!!!!!!!!!!
its like Sesame Street kids
todays word is
"DEFLECTION"
we just learned deflection ,
it has been a productive day
its the way the newer hydraulic cranes are .if they don't bend they well break ,and the super lift doesnt allow as much deflection .
instead it compresses the boom ,making it want to retract more than bend.
just take a stick and bend it it well eventually break ,take that same stick and try to push it from the top to the bottom it well withstand more load
CHEERS
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True, but that side deflection he has on the model is rather annoying. That is a lot of boom - I wonder if all the models behave in that fashion. There should be a relatively discreet method of shimming the sides so it at least droops "straight down."  The other option is getting a replacement. If they're both crappy - get your money back...
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ulf wrote:True, but that side deflection he has on the model is rather annoying. That is a lot of boom - I wonder if all the models behave in that fashion. There should be relatively discreet method of shimming the sides so it at least droops "straight down." you may be able to move it out to a sweet spot ,by ensureing its level (i know extreme in a hobby world) but worth a shot, or the paper i mentioned earlier
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I like the deflection in the boom....looks real......I also like a bent piece of lattice in boom too..in duty cycle rigs (especially piledriving) lattice gets bent on a reg. bases......long as the picture frame isent bent and you dont have several pieces on lattice bent together its ok on a small rig....
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While "deflection" may be the standard in the real world, this is model world. There is no load on the unit. My AC500 doesn't have this issue when fully extended. Nor does my LTM1300 or GMK6300. It's my "feeling" that the spec is off and the boom sections were not milled to be as tight as what I'm accustomed to. That being said, no one has referenced a similar problem with their AC200 yet. Perhaps I'm the only lucky sucker to have a realistic AC200 in my fleet! Anyone insterested in purchasing a true-to-life Kynningsrud?! Just a curious side note; anyone have this problem with their LTM1200? Thanks for the replies everyone. Namaste, Bug
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There really is'nt any machining involved with the boom sections . What I've noticed is the paint is what shims it up the few I've stripped to repaint really get sloppy when all the paint is off.
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I've got an LTM 1200 and although it deflects, it doesn't list off to the sde like your AC200 does Jamie
Cheers
Jamie
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