I'm not sure if that will work the way you want it to but I'd like to see if it does and how that bow turns out. I was talking to Tim Baker a couple days ago about this argument and here's what he said.
tiff outer limbs increase arrow speed three ways:
1, Reducing limb vibration.
2, Decreasing string angle, for lower stack/greater energy storage.
3, Reducing outer limb mass.
Although most of a bow's lost energy leaves via limb vibration, likely only a few % of this is rescued by stiffer non-vibrating outer limbs. Reduced string angle saves some relatively small amount too. But by far the biggest savings in via reduced outer limb mass, partly because this reduces limb vibration also, and string stretch, which itself aggrivates allows vibration. General terms are used here because the best engineering minds in the field still don't fully understand the interinvolved dynamics at work in a simple stick of bent wood, a situation that make us wood bow guys happily amused.
In practcle terms, the best way to increase bow perfomance is by lightening the outer limbs. The best way to do this is by making them narrower, as narrow as possible without becoming unstable. The greater % of limb length narrowed the better, but benefits fall of quickly around mid limb, since only the outer limb is accelerating quickly. If severly narrowed they must be a bit thicker to keep from breaking, and if thicker they can't bend as much as mid limb without breaking, so they end up being not just much narrower but much stiffer. They don't have to be completely stiff. In fact if you added enough wood for that then outer limb mass rises past optimum.
If you can't take his word for it then you're making slower than optimal bows!
