I do one of the following:

• Plot things out onto sheet with a ruler and compass
• Slip the sheet under the plan and poke pins through (for complex curves)
• Make a copy of the strategic bits of the plan and rubber cement them to the wood, cut things out, then peel off the paper bits

Folks who etch their own printed circuit boards know that laser printer toner will transfer to a circuit board with an iron.  It generally sticks the paper to the board, but that can be dealt with.  You could maybe do the same thing with your plywood.

I prefer to photocopy the plan then cut up the copy into templates. Where needed, I just use spray glue to attach it to the wood. Has the advantage that you can just peel it off when you're done.

I guess the first trick is to print out a second copy of the plans. ok.....
I guess ink jet ink will not work as well as laser...

I just take my Cad drafted plans,, rearrange all the parts appropriately, send the files off to Pat, who then sends me back perfectly cut pieces,, not sure what all the fuss is about?

 
Oh thats right, Randy still uses a pencil,, which SURELY must be contributing to global warming some how,, either in manufacture of hte pencil itself, or when you sharpen it, the carbon dust floats up into the stratosphere,, yeah thats it,, and then dont forget about all the erasur shavings when you have to correct things,,
yep, I am "green" designing,, 

Inkjet won't work at all

For the iron-on trick, but work's fine for the glue-on, trace-on, etc.

I trace and cut my parts from a good tracing paper. I pin them to the wood then dust them with paint from an aerosol can. Generally a dark color, but I have used a bright megenta kinda like a day-glo. Remove the tracing paper and there's your outline.

I know of no one else that does it this way?

I have some paper parts with the overspray if anyone needs photos?

I just dug out my F3F-1 in stages, I'm working on it again, and found my templates with the overspray.

Anybody try T shirt transfer paper for transferring part patterns to wood yet?  One of the plan sites that has rubber power plans among their offering recommends it for transferring full color parts onto balsa wood for reproductions of some of the old Frog and Top Flite kits, but it kind of seems to me that it should be able to be used for parts outlines.  For their application, one either prints the parts direct onto the sheet, then irons the pattern down, or sometimes the original file needs to be mirrored to allow for reversals of the characters

I have a pack, but haven't tried it.  You run a sheet through any kind of printer, then iron onto the balsa sheet, and can then cut out the parts  Only two problems I can see, it comes in 8 1/2 X 11 inch sheets, so you might have to do some editing to bet a best fit with least waste, and since it is intended to transfer pictures onto cloth, it strike me that it would be like putting a large sheet decal onto the wood, with attendent need to remove the film somehow after cutting the pieces out.  Or maybe not.  And the packs I bought are 10-packs at something close to a dollar per sheet.

Even good old rubber cement, plus I like rolling the rubber cement up into little balls when removing it! 

Trying it, HEY!!! You can't tell this from boogers! Wait... a minute...