Hello,
I am tempting myself with the Galloglass axe from Wulflund. If anyone has any opinions on this I would be very interested in hearing them. I would probably haft it myself here. I am wondering about the section of historical and specifically Irish polearms. I was looking through my pictures and can see that poleaxes often seem to have square sections. It seems to me that octagonal, square or oval(?) are very useful in keeping the edge on-line. Is this the case on axes from history. Given that to make a round shaft one has to go through both square and octagonal sections it seems interesting that anyone would choose to go past wither of these states.
Neal

Rectangular and square, usually with rounded or chamfered edges, are common profiles. They're the dominant profiles for European polearms after about 1400, except for spears and close relatives. Oval was also used. The hafts might also be round at the head, and transition to square/rectangular where gripped. Oval is common for East Asian cutting polearms (e.g, naginata) and beaked polearms (e.g., ge) from the Bronze Age to modern times, though round is seen on Chinese cutting polearms.

Rectangular or oval as opposed to square or round gives more strength in the long direction of the cross-section for the same weight haft (and less strength in the short direction). It also gives control of edge alignment. Oval and round vs rectangular and square gives more comfort and less weight for the same strength, but less resistance to the weapon twisting in the grip.

However, while round section seems inferior, on the basis of both strength of haft for a given weight, and edge alignment and security of grip against twisting, round section was used on axes and other polearms. The inferiority is not large enough to make people stop using round section hafts. I haven't had any problem using billhooks mounted on round hafts for pruning trees. One does need to look at the head for edge alignment, rather than just using feel, but no problem during cuts.

You don't have to go through square to make a round haft - wood grows with a round section (and you get a nice tapered haft for your spear too, by using wood-as-grown, rather than sawing and rounding from a larger piece). Modern hafts are so commonly round because turned poles are common and don't need any further rounding or chamfering of the edges.

Great answer thank Timo. Do you think coppiced trees may have been deliberately "coaxed" to provide shafts for spears etc.ash trees around here coppiced natural and even saplings don't really grow very straight.

Also it is very much possible to straighten a crooked piece of coppiced timber.

I suppose the same method that are used to straighten arrow-shafts would work too if scaled up approriately? i.e heat the wood and bend to shape. In large enough scale, that is how the Scandinavian clinker built ships are made, and then it is massive oak planks that are basted and bent.