heres a link to the above book by Cheng Dong
http://www.paragonbook.com/html/browsesubj...n.cfm?item=5980RE; crossbow usage & its full effect.
What it may mean is the ranks rotated...as we well know anyway.
Records from the time according to Osprey suggest putting the short men with halberds at the front and tall men with bows at the back. Seems like they do shoot over heads sometime. Osprey isnt much useand this picture in my mind is rather odd...but that was the drift of the quote.
Yang Hong makes clear the crossbows advantage is its piercing power that defeats the Huns leather armour & shields (as commented by a Han general).
By pointing them up into the sky the crossbows piercing power is nothing special. It could be any other arrow dropping down by gravity from a short bow or such.
A flat (or flatter than a bow) trajectory is the case for a crossbow to be effective. That seems pretty clear to me.
If the crossbowmen are behind a single strike on a drum can let the archers move into open order, or the crossbowmen step to the front.
The loading from the rear and advancing to fire is well known by later dynasties.
I'll stick with flat trajectories. With only 30 arrows in a quiver from archaeolgical discoveries it isnt worth firing them way up high before the enemy close to a 1 hit 1 kill range. Inside of a high arc the hitting power is mindboggling now than 120kg draweights seem possible.
It would fly hundreds of metres in a high arc for sure....it could be used that way. That is true.
The enemy would just have to loiter out of effective range however with good sized shields and soak up the arrows with a whole lot less effect.
Better to break them up close in effective volleys if it is still lethal out to 260m or so.
I dunno.
Illustrations are fine for insight...but I would need to know when they date from and see them. Even the terracota warriors formation tends to be taken too literally I think.
The idea of crossbowmen loading to the rear of the front rank has often been mentioned.
Could well shoot from the shoulders of archers with little risk...like ranks with muskets after all. Drills might be comapribel with slow reloading.
The sights on Han crossbows are for flat trajectory fire BTW, a good line drawing in the Yng Hing book shows the sights being used in a near flat trajectory.
Remember Selby however suggests the arc was used, also so it had 3 fields of fire between bows and crossbows, but his comments to me emphaisied flat fire too.
The real killing is done inside with direct fire.
PS re; siege weapons;
Yang Hong mentions records at beacon watch tower sites where if refers to reapir of 250kg & 300kg crossbows. This is beyond 10 dan and may be the arcuballista for the fixed towers again.
It comes from a Han era record found and translated.