Design: Ballista [6+1-1, 2-1, 3-1]
Moskurg rolls out its first siege weapon this year.
The ballista is...well, it's powerful. It's constructed primarily out of wood with iron caps and nails holding it together. The ammunition sits on a wooden slider in the center, and the bowstring is attached to two massive, thick arms of wood. Rather than storing the tension in these arms like a traditional bow, two vertical cages hold the arms in twisted torsion springs made out of animal sinews. The entire device sits on a stationary wooden stand that requires the ballista to be set up prior to firing. There are currently two types of ammunition we can fire: small stone boulders referred to as "shot", and what essentially amounts to feather flights attached to an entire spear. The shot tends to be less accurate, but good against massed troops and fortifications - even stone ones. The javelin is far more accurate, but likely won't kill more than one at a time unless the enemy is standing in a line.
Using our knowledge of compound bows and the advancements we've made with archer ammunition, we've managed to get the device to about as lethal as we can get it. The device out-ranges even Arstotzkan longbows if we use the javalin, and hits with shocking accuracy. The siege weapon requires rather precise crafting to get to this level of quality, however, and several months of training are required to train the siege engineers in its use. This makes the device Very Expensive, so we can only field two or three at a time.
Even despite fully trained crews and careful manufacturing, the ballista can be...temperamental. The crank used to wrench the bowstring back doesn't have a safety, so if the user slips before it's fully set then it'll misfire and violently spin in the opposite direction. This has been known to break arms. The wood must also be made of as high-quality timber as we can get and inspected for cracks before each firing event, otherwise the device can - and will - shatter when fully torqued. This will completely destroy the ballista, and likely kill the crew. Even when the operators are being careful and taking their time, sometimes the device will simply misfire and destroy itself.
It's a powerful, but dangerous weapon. Very Expensive.