I've been going through my pile of leftovers from last years deck project an a bunch of boards ranging from 2x4 to 28x120mm have warped into corkscrew.

Is there anything one could do to unwarp these?

Ah, that's precisely what I didn't want to hear since I don't have access to a planer/thicknesser nor a bandsaw nor do I have a fireplace either 

I can edge joint to some extent with my EHL65 in it's stand, but it's not good at any longer lengths of board and limited to 65mm width. And I can cut strips with my TS-saw with either the guide rails or in the CMS, but I don't think I can get away with them tools from the thicknessing phase?

I guess I'll have to get cracking on building the boxes for the S.O.'s planting gear and reclaim the whole shed for myself as a man-cave - maybe then I could somehow fit a tabletop planer/thicknesser in there...
Where's the Tardis when you need one? 

The most reliable method to "straighten" timber is by removing stock.  I wouldn't trust lumber that had been stressed or coached back to flat.
Since you don't have a jointer/planer I assume you are building furniture for enjoyment not profit.

I don't have a power planer but I do have a power jointer which is burried & hardly ever used -- I discovered the quiet, dustless joy of using bench planes and always use those to bring stock to size & flatness after I've sawed to near net. I can control dimensions much more accurately (<.001") than is possible with power tools. 

If I were pressed to earn a profit then I would probably want powered milling.

Ah, got carried away in my last post a bit. I currently only have a Stanley 4C smoothing hand plane, though I'm currently waiting for pictures of a friends fathers tool collection who used to be a boat builder before he passed away. Apparently he had a large selection of hand tools that no-one in the family wants so I'll get first picks and I'm hoping to get lucky with some nice tools.

You have to cut them into smaller pieces to minimize the relative amount of warp (relative warp will be that same in a consistently twisted piece no matter the length) and then glue into larger assemblies, like table tops. Trying to reduce the twist by flattening results in smaller usable (thickness) sections anyway so you might as well re-cut and waste less wood.

Cutting twisted wood is a good job for a band saw.

You need a good strong bench for hand planing but a power planer like the 65 does not. If you re-saw the stock down to the width the 65 can handle you can get it into good shape. Since you don't have a planer, get the inner joining surfaces true enough to fit well and then you can sand the exterior to suit.

The boatbuilder likely had some very interesting tools. Don't miss this opportunity. Do some studying.
appearance can be deceiving. An old well used chisel indicates that it was a fine combination of durability and ease of sharpening rather than just and "old" tool to be passed up.

What type of wood is it?  Pressure treated?



Seth

Have you ever seen someone herding cats ? 

Aye they seem to make good saws in Italy. I've just bought a firewood saw [700mm blade] and it's fantastic. I'm not sure but I seem to recall your Laguna bandsaws originate in Italy.

I've never owned or operated a Meber, but I do know they have been making bandsaws for over fifty years just outside of Balogna, Italy.

Their machines seem to be well regarded. They were the first company to build bandsaws for Laguna Tools, back when Laguna was considered top of the line.  Laguna later switched to ACM, also in Italy, and then to several other suppliers in several different countries.

Step Two:

John, are you aware of ANY poor quality bandsaws from Italy?   

I believe that to be true -- you seem to get a bit of inspiration from that which isn't straight & narrow. 

Ron, I have not run across any.

I don't know why the Italians have such a reputation for manufacturing quality bandsaws. It could be that for so long they have supplied more to the rest of the world than any other country. They have a huge interest in maintaining a stellar reputation.

Thanks for the info John.

Nothing special in this pile - just that its pressure treated so can't go and burn it.

I managed to give some of them last night to a friend whos going to repair some rotten backyard barcounter roof posts where the twist doesn't really matter. So at least not all of is waste. :-)

I regain more space, he get free lumber to fix his roof - everyone wins