@ Stalker,
Hi, it's not really a pyramid as there is a good bit of thickness taper. I think a true pyramid is constant thickness and just a width taper.
It's more a Neoloithic leaf/spear shaped limb... (I'm sure there's a fancy name for it). The tips are slim and a bit thicker
Here are some dimensions (upper limb, which is less wonky)... sorry but I'm using mm for width and thickness as it's more convenient starting on the fade where it's pretty thick.
Distance from fade, width,thickness. (rounded to 1 decimal place)
0", 48.5mm, 24.5mm
1", 51.3mm, 20.4mm
2", 51.7mm, 19.3mm
That's the fade, now every 6" from there
8", 48.3mm, 17.3mm
14", 44.9mm,15.7mm
20", 38.0mm,13.0mm
26", 22.6mm,12.7mm
When I was tillering it, I'd got to about 23", I'm sure it would have pulled 50# if I'd wanted.
Those dimensions include the bark of course which must be about 1mm, so without the bark, thos dimensions probably would give 50#, or simply heat treating the belly would bring her up there. I was actually struggling to get the weight down! I had the tiller right at about 24" and had to be careful not to screw it up.
The thickness taper was roughed out to about 1.5mm every 6" and then all done by eye and feel.
Hope that makes sense.
Del