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Twist in the Hull after planking Options
Lakes74
#1 Posted : 24 October 2010 12:51:39

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Hello all,

I've just noticed after completing the 5th layer of planking there is a slight twist in the hull that i'm sure wasn't there before (see attached photo). I fitted one plank at a time on either side as per instructions. Before i carry on with the planking i'd like some expert opinions id possible! If i keep planking, will it even out or do i have to take action now? If the latter, what shall i do? Is it because of the cutaway that there's uneven tension on one side?

thanks all in advance!

Steve
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benny
#2 Posted : 24 October 2010 15:51:34

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hi steve..wait to see what others say but i would deplank and see what happens,to me it looks like your false keel was twisted before you started to plank..are you sure your decks are in square to the ribs..paul
cheers benny
Lakes74
#3 Posted : 24 October 2010 17:00:31

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Hi benny, ok will do. It may be the case that the false keel was slightly twisted Mad. Will it cause a lot of hassle further down the build if i leave as is? You can't really tell unless you have a detailed look along the length. It's off by approx 2mm. Rather than deplanking (which i really don't want to do), i could steam the whole build then fix into position using large clamps? As you say though, I will wait so hear from the other guys before i make my decision. thanks again!
Jack Sparrow
#4 Posted : 24 October 2010 18:01:37

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I would steam it gently then clamp it in a jig to square it off. BigGrin
karl1113
#5 Posted : 24 October 2010 21:12:15

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I think you should de-plank and you may have remove the deck(s)It is very important to square up in a jig with these items removed,then steam gently and leave to dry,sounds a bit like a cooking lesson this.
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Lakes74
#6 Posted : 24 October 2010 22:04:49

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Thanks for the feedback everyone, really appreciated. The problem is the keel is not bent, but twisted. I'm not so sure if a jig would help. I'm not prepared to deplank and remove the decks as it's taken me so long to get to this stage, I hardly get the time to build as it is (10 hr days + commute, a toddler and baby on the way). So i've had a real good think all day about it and if my brainwave doesn't work, then i'm reluctantly gonna scrap it. The build rests uneven when i turn it upside down, if i apply a little pressure on the hull, it evens out. So my solution is to steam the the hull from underneath then secure it upside down on a work bench for a day or two.
rayb
#7 Posted : 26 October 2010 15:59:45

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Hi Lakes

Your last post makes my fully understand your position time wise. I would try what you have said, steam,clamp etc. If it does not work rather than scrap (which would be a crying shame because of time spent and your pic shows you have done a nice job so far) Why not try a drastic step. If you can determine exactly where the twist has taken place why not, at that point cut the keel from the bottom up, not all the way to the top, say about 2/3 up. then offset the keel until it is in line and glue in place with packing pieces and if possible beef up the joint with more wood.

Without seeing it I would say that the keel has not twisted near a frame more probably in the middle of two frames which would give space to fix the repair pieces. Also at the bottom of the keel there should not be any interference from the repair to the rest of the build. If my words are as clear as mud PM me your email address and I will send you a drawing

Best regards
Ray
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