I hope this information is helpful to you:
Our boat is a bit bigger and older -- but has a white oak wood rudder that is built with bronze drifts onto a bronze shaft. We rebuilt it in white oak -- as it was literally rotted away -- but we did reapply (to the new wood rudder) the bronze straps that someone has surface applied and thru-riveted to the old rudder. We had them, so we just used copper rivets to reapply. All seems good.
Old rudder when we bought the boat in 2006 -- eaten away but the STRAPS are there:
Laying new rudder parts
on top of old rudder (pattern):
Install of new stock (yes our old one was shot so we had a new bronze rudder stock/shaft farbricated) and new white oak rudder -- see those faint black lines drawn on the rudder? they are where the drifts (bolts) are inside the rudder -- though a couple of those lines were "false, oops, not here!" most are correct.
All sanded and before paint
-- we did epoxy
a high tech bearing to the rudder and stock at the place it enters the atlas bronze rudder shaft but the rest is as the original was designed.
It was a last minute decision, after the bottom paint
had already gone on, to rivet the old bronze straps onto the new rudder but we figured: what can it hurt? so did so.
At a 5 year later haulout (to raise the waterline) we did end up having to re-prime all the bronze on the rudder because our original priming was sufficient to keep the bottom paint
well in place. Now all is good.
Sorry! no pics after painting over the yellow epoxy
primer and the raised waterline. Bummer that, but it's all good and has been back in the water 5 years since this pic.
If you consider making a new rudder -- Making the new rudder itself wasn't such a huge job. Drilling the straight holes for all the drifts -- and fabricating the large bolt heads for the ones that went through the rudder stock itself -- that part was a bit "tense" but overall it was good.
If your wood is really seriously warped, refabrication would be a future option especially if your application of bars is not sufficient to fix the problem.