Metus regem, on 06 April 2015 - 10:22 AM, said:
I know.... I know....
But there is lore precedent for a single shell cUAC, the Ebon Jaguar Alt. A, mounted a 203mm single shell UAC.
Caliber alone doesn't make for much of an argument; the 185mm (7.2 inch) AC/20s of the Demolisher needs 4 shells to deal 20 damage, and a 203mm shell (8 inch) shell isn't that much bigger.
However, there are a number of canonical passages that support UACs being burst-fire weapons:
"The second
Summoner in Marthe's Star targeted the
Quickdraw. The heavy ultra-autocannon fired two volleys. One drilled through the armor on the
Quickdraw's right flank. A silvery explosion heralded the death of a jump jet, while a splash of green smoke indicated a heat sink had been destroyed. The other blast of shells ripped all the armor from the 'Mech's right arm and all but severed it." -
Prince of Havoc, ch. 11
"Unimpressed, the
Sentinel unleashed its ultra-autocannon, sending a storm of shells ripping into Feehan's right torso." -
Call of Duty, ch. 25
"Poised to his left was a
Cauldron-Born. This heavier OmniMech was of more concern. His sensors told him it was a Class A configuration, mounting a deadly Ultra Auto-cannon and two large lasers outfitted for extended range."
"The first two autocannon rounds whizzed past Trent's right side just past the cockpit. He began to twist the
Timber Wolf's torso as the rest of the rounds began to slam into his right and center torso. The Ultra Autocannon was a deadly weapon system, and the
Cauldron-Born pilot was obviously a skilled marksman. The shots shook and rattled the
Timber Wolf as if it were caught in a hurricane. The whole 'Mech swayed under the shuddering impact of the rounds, and Trent listed forward, leaning into the incoming fire to keep the giant war machine from falling.
The stream of shells moved suddenly upward, one hitting the massive shoulder missile rack, the others then passing into the crater wall and some even higher." -
Exodus Road, ch. 05
"Due to the heat buildup in his 'Mech, he held off for a full second before firing his Ultra autocannon, then sent a steady stream of shells into the guts of the
Trebuchet. Each round exploded deeper and deeper into the heart of the battle machine, mangling internal structure and important subsystems." -
By Blood Betrayed, ch. 15
"Petra focused on her opponent and thumbed the trigger. Monstrous shells the size of trash cans poured from her
Stormcrow's left-arm autocannon into a Combine
Centurion, battering its armor mercilessly and sending the machine staggering backward as its pilot struggled to keep it upright." -
Test of Vengeance, ch. 12
So, we know with certainty that the Clan UAC/20 of the
Thor C (the only config that carries a UAC of any type) and the IS UAC/5 of the
Sentinel are burst-fire weapons.
The Clan UAC/20 of the
Cauldron-Born A is described as firing a "stream of shells" which must consist of at least four individual shells (the first two that miss, and the remaining rounds - plural, indicating at least two - hitting the right-torso & center-torso of Trent's 'Mech) - though "stream of shells" generally implies a more substantial number.
Then again, eight 203mm shells from a double-burst of a UAC/20 (four shells per burst) would indeed represent a substantial amount of ordinance.
The interesting thing is Petra's
Ryoken B, also mounting a Clan UAC/20 in the left arm and described as firing "monstrous shells the size of trash cans"... which sounds very impressive, until one realizes that they're talking about countertop-sized mini trash cans like
this one (6 inches, or 152mm) or
this one (8 inches, or 203mm).
More to the point, the shells from Petra's UAC/20 is described as "pouring" from the weapon, which implies a significant volume of fire (e.g. a substantial number of individual shells).
These passages, among others, would seem to support UACs as burst-fire weapons, with the Multiple Targets rule from TacOps supportion the idea that UACs fore
compressed bursts of such short duration that they effectively cannot be walked across targets.