Actually I have a seven foot spear, not intended for throwing per se, but I have thrown it for giggles. I can throw it 18 paces, or about 54 feet. I'm sure an extra foor of ash isn't going to affect that much.

By the by, the study of polearms isn't amywhere near as refined as swords; categorizing polearms beyond a very narrow context may well be impossible. You can go to a dozen different sources and get a dozen conflicting definitions of Guisarm, Fauchard, Bill/English Bill, etc.

At least part of the problem is that while swords are fairly straightforward, polearms are often as wild as the maker's imagination. It's kind of like the food at Taco Bell. The same ten ingredients can be rearranged any number of ways, and it takes a full time marketing team to keep coming up with unique names for them. In this case there are myriad combinations of hooks, flukes, spikes, axes and hammers, plus blades of almost infinite geometry. Naming them all or categorizing must be a nightmare, and as far as i can tel there is no accepted convention.

A few pieces like pikes and bardiches have very specific meaning, that are pretty well accepted, but where does a sparth end and a bardiche begin? It's tough to say.