Single-edged blades with a ridge
 

As part of a project on kopis and machaira swords in the ancient Aegean, I am thinking about cross-sections and swords designed for low-carbon unhardenable steel. Its not generally appreciated that these swords had ridges not fullers if they were more than a simple wedge-section. The fullers are more typical of war knives from Iberia. I have archaeological drawings but little data on distal taper and most ancient swords are too rusted to precisely measure anyways.

So I am trying to collect types of single-edge blades from the last few hundred years that often have a thickened spine or a ridge along the blade close to the back edge. The three that come to mind are:

- many Ottoman yataghans and kilij
- many peshkabz daggers from the Persianate world
- some nineteenth-century sabres from western Europe like Prosser's pipe-backed blades for the British Army

Am I missing any single-edged weapons that tend to have a T-section or -+--- section?

Welcome to the Ethnographic Forum! Interesting question and I hope one of our knowledgeable members will be along shortly to help you.

Much like their smaller pesh-kabz cousins, Afghan Khyber knives usually have a T-section spine.

It seems like T-sections were popular from the Ottoman Empire to India in the 18th and 19th century? I wonder how they made them because that shape can be a pain to grind and polish.

Blades with a ridge a bit forward of the spine remind me of a classic five-sided katana blade. I don't understand blade engineering well enough to understand why katanas have that section. Guillaume Stanislaus Marey-Monge thought it made for good cutters.

The katana's five side blade geometry goes back to the earliest sabres and proto sabers from the Eurasian steppe peoples, possibly travelled from there to Japan via China.
My pet theory is, that it is the natural shape you arrive at when turning the concept of a diamond shaped double edged blade into a single edged blade, keeping it quite robust while reducing its weight.

Another weapon type I can think of with t-spine section are pichak knifes from Central Asian Turkestan.

To belabor the obvious, T-spines provide greater rigidity while using less metal. A brilliant engineering solution, seemingly developed by the Turkic-Mongol crew.

Offhand, I can't think of it occurring elsewhere, but it's early, and my coffee has not hit my brain yet.

Welcome! Can you show us a few example pictures you are thinking of referring to? Thank you very much!

I can copy from my markdown file based on a quick glance through Egerton and some catalogue searches.

Yataghan, Metropolitan Museum of Art, object number 32.75.261a, b <https://www.metmuseum.org/art/collection/search/23379>

Peshkabz eg. Victoria and Albert Museum, object 3436&A/(IS) <https://collections.vam.ac.uk/item/O...heath-unknown/> British Museum object As1982,11.3.a <https://www.britishmuseum.org/collec..._As1982-11-3-a> British Museum object As1982,11.2.a-b <https://www.britishmuseum.org/collec...s1982-11-2-a-b>

Some Khyber knives like Victoria and Albert Museum, object IM.218&A-1920 <https://collections.vam.ac.uk/item/O...heath-unknown/> (there may be others in the V&A)

Possibly this tulwar-hilted, saw-toothed broadsword, V&A Museum object 3142(IS) <https://collections.vam.ac.uk/item/O...sword-unknown/>

I have not looked into the 19th-century South Asian swords which get very broad towards the tip.

While Most of the examples with t-spines mentioned in this thread I agree are likely derived from Turkic blades (I think they appear on Ottoman Palas in the 17th century) I remembered an interesting much earlier example that I had to dig through my old pictures to find. I found this knife in a museum here in Germany, unfortunately I cannot recall anymore which museum exactly. With a bit of taper at the forte this could pass for a crude Afghan Peshkabz, but it was excavated in a local celtic burial mound dated to 600 to 500 BCE! Doesn't seem that the design really took hold back then, I haven't seen any other examples.

That's breath-takingly surprising!

Thank you for the information, and for your memories!