Astelon wrote:I doubt that the tunnel idea is workable. The sharonians would have to dig down more than three thousand feet as well as out through the portal, remaining underground the entire way. They won't be able to start the digging at the portal itself, so how many miles of tunnel are we talking about here? That is a rather large undertaking.
...is utterly confused.
The reason there is a 3000 foot knife sharp cliff is that the portal cut it, AKA any tunnel into the "knife edge" of the cliff is on the other side of the portal. QED
Any part of the cliff on the Sharonan side of the portal is the debris at the bottom of the cliff formation from a combination of the structural weakness related collapse from the top of the cliff plus post portal formation extended hurricane (+++) winds.
Most of the Sharonan rail road ramp into the cut is from material brought down from the "waterfall of air" weathering the weakest rock of the portal, depositing it at the base of the cliff.
Astelon wrote:If mortars can reach the bottom of the cliff sufficiently, then you don't even need any makeshift bombs. That also means properly aimed and timed attacks will be easier. I still suspect that any large arcanan force at the base of the cliff is a very bad idea. They would be much better off with picket forces at the Cut and its approaches, and rapid response forces based at a camp further away (outside of artillery range).
The most important part of the mountain cliff for the Sharonans is not on the back side of the mountain.
It is the -top of the front side-, AKA the side facing them.
All the Sharonans have to do is drive the Arcanians away from that lip to get their talent beach head at the cliff's base or inside the cut.
The dead zone favors the Sharonans here because of the lack of indirect fire Arcanian weapons and the low force density across the top of the cliff.
Once the Sharonan distance viewers and flicker talents are on the Arcanian side of the cut, with multiple "just over the portal" flicker tunnels. They can see all the Arcanian positions to call artillery on them, save for the dead zone at the back side.
Once the Sharonans drive the Arcanians out of direct energy weapon range of the top cliffs -- and they will know this for certain from their distance viewers and life-form sniffer talents -- they can lay cableways from the ground to the top of the cut and place heavy mortars on top of the cut to compress the dead zone on the back side.
[/quote]When a shrapnel loaded explosive device detonates the bursting charge gives velocity to the shrapnel itself. The Boston marathon bombing was essentially an improvised shrapnel bomb. Grenades are essentially small shrapnel explosives; pipe bombs and most improvised explosives devices work in the same way. [/quote]
The Boston Marathon bomber's IED didn't have a 1,300 to 2.000 feet per second initial velocity when it went off.
And orders of magnitude mean things with explosives.
A 240mm Howitzer shell from WW2 threw 1,050 0.93 oz fragments, at 253 meters per second, to a distance of 1,000 feet. The shell weighed ~383 lbs.
As the Big Bertha 42cm M-Gerät Railway Howitzer threw a 1,800 lb shell -- albeit with a less powerful explosive with a lower explosive fraction due to less advanced metallurgy -- I am going to call the Big Bertha as still -significantly better- in terms of total fragments in that distance/energy range.
A Big Bertha shell is after all five(+) times the mass and many times that in total interior volume.