下面是一段小说描述。原铸星际战士先是从大气层的边缘被扔下，当时甚至看得到远处那星球边缘的弧线。随后，过了一段时间，他看到下面的东西越来越大，他的动力甲摩擦起火，宛如掉落的流星。最终，他无伤落地并且即刻开始了战斗。
原文：For minutes he fell in silence. The surfacewas so far away he appeared to be making no progress.
There is no sharp delineation between a world’s air envelopeand the void, but instead a region of increasing attenuation where, atom byatom, air gives way to vacuum. But there does exist a point where the airbecomes thick enough to support atmospheric flight – the Kármán line – andthere, air becomes thick enough to feel. Justinian hit it with a jolt. Heatfollowed almost immediately as friction, imperceptible only moments before,quickly built around his armour. A plasma-torch roar filled his ears.
The coming moments were critical. Gaining a good angle ofdescent at this stage would ensure mission success – a colourless statementthat meant only that he would not die before the enemy got a chance to shoot athim.
An alarm sounded in his ear. Cordus’ signifier flashed.
‘Cordus, correct course two points vertical, you aredrifting,’ said Justinian.
‘Yes, brother sergeant,’ Cordus responded. His signifier dotand its accompanying rune moved across Justinian’s display, and the graphicceased blinking.
The others spread out into a wide dispersion pattern. Threetargets awaited the demi company’s attention: a series of closely bunchedbastions, each one bristling with ordnance.
A bright corona of heat streamed around Justinian, mostintense about the reinforced ceramite of his boots. It became uncomfortable,but not dangerous. Provided there was no breach in his Inceptor battleplate, hewould be safe.
Soon after, he reached terminal velocity and stoppedaccelerating. The curve of the world grew quickly, filling his vision with theground. As the minutes passed, space retreated to the periphery of his visionand vanished. When the last of the black was gone, he finally felt like he wasfalling. Individual surface features resolved themselves, details popping intosharp definition, though all were flattened by his relative height, so thatmountains appeared as painted flourishes upon a round canvas.
Below him, fighting raged upon a plain bordered by a rangeof hills pierced by a wide valley. Across the valley mouth was a great wall,and a strong fortress not far behind. Two battle lines became visible. Theirexchanges of fire were startling weaves of light. A vast phalanx of AstraMilitarum tanks, supported by Adeptus Mechanicus cyborg troops and warmachines, advanced on the wall from the drop zone.
The wall looked like a ribbon, but in truth it was almostone hundred metres tall, and forty wide. The Titans of the Legio Metalicaswelled, their carapace insignia taking on form. They were now the size of men,and the warriors milling about their feet had become the insects. The scenegrew before Justinian’s eyes, unfolding like a fractal tapestry.
Aircraft sped below, swift as avians, duelling with draconicdaemon engines for control of the sky.
‘Demi-company split,’ ordered Sarkis. ‘Squads to targetdesignated mission objectives in three, two, one. Fire jets. Formationdisperse.’
‘Fire jets!’ ordered Justinian. A smaller reticle ignited inthe centre of his pelorus and settled over his own squad’s landing zone: themiddle tower of the wall. The tallest one.
His jets roared furiously against the drag of the planet.Justinian slowed only a little, but his course altered, and he was senthurtling laterally towards the tower.
They avoided firing their jets until the last second of adrop. When the Inceptors had first been deployed, the enemy had mistaken theirsquads for falling debris or stray munitions. In the chaos of battle, they hadbeen paid little attention until it was too late. Lately, the foes of theImperium had become wise to Inceptor drop tactics. The sky filled with a stormof flak moments after their jets finished burning.
Justinian fell through a wash of fire. Shrapnel pinged offhis armour. The thunder of atmosphere lessened. The demi-company’s attackspread widened, the dots that denoted each warrior perfectly positioned inthree clusters, one for each defence tower.
The target went from a child’s toy to a towering edifice ina matter of seconds.
‘Fire jets, prolonged burst,’ he ordered. ‘Decelerate toengagement speed. Rouse the spirits of your weapons.’
He hefted his own guns, eager to unleash them upon the enemy.His jets ignited again, and this time they stayed burning. The fuel gauge inhis display rapidly fell from full to a third as he braked. He was no longerfalling but flying, and that ate up his fuel quickly. In a graceful arc, he andhis squad thundered towards the upper battlements of the tower. The bastion wasludicrously embellished with screaming daemonic faces, its crenellations talland fashioned into unnecessary spikes, but it was well armoured, and four quadflak cannons squatted in heavy turrets at each corner, banging off shots at theattacking Space Marines. Heretic Astartes opened fire as the Inceptorsapproached, and their fire was more worrisome than the flak cannons. A boltround spanked off the cowling of Justinian’s left jet nozzle, staggering hisflight. More bolts came, then a flurry of them.
Cordus’ ident signifier blinked to red and fell away fromJustinian’s display. Justinian risked a glance back. Smoke and explosions hidCordus’ fate, and he did not see his comrade die.
Another bolt smacked into his breastplate, cracking theouter casing and fracturing the power cabling beneath. Smoke blew from thecrack and his jump pack engines coughed. A lurching drop made his stomach flip.Icons blinked, alarms squealed. Justinian prepared to fall to his death whilehe sought a solution to his power failure. At his urging, the cogitator in hissuit rerouted power. The jets roared again, and he surged on with renewedspeed. Sealant foam bubbled up to plug the breach in his armour.
The enemy would have to try harder to stop him than that.
Justinian dropped down then burst upward and over thebattlements, Aldred beside him. Half a dozen members of the Iron Warriors linedthe parapet. Boltguns flashed, revealing horned helms and faceplates cast withdaemonic visages. They were terrifying foes, made Adeptus Astartes by theEmperor and granted greater vigour by their Dark Gods. Once, they were themightiest warriors in the galaxy.
They were the mightiest no longer.
Your death has been too long coming!’ Justinian roared, hisvoxed shout blasting from his helm as he descended on pillars of fiery smoke.‘Prepare yourselves for the Emperor’s judgement!’ He came down with abone-jarring thump hard enough to crack the ferrocrete of the tower, gunsalready blazing fire. Assault bolters were powerful weapons, but if usedunwisely they would run through their ammunition stores in seconds. Justinianchecked his fury. The resupply pods had yet to land.
- Dark Imperium
所以，从大气层边缘掉落，途中自由落体，并且最终砸到地上的冲击完全不会让原铸星际战士的动力甲受到任何伤害，而且他们还能马上就开始战斗。我们在这里带入每秒11公里的流星坠落速度，至于质量，根据以下原文，不携带任何武器时身着动力甲而身高2.1米的普通星际战士重达半吨到一吨。
原文：Whilst wearing their power armour, anunarmed Space Marine typically stands slightly over 2.1m tall and weighsbetween 500~1,000 kg.
- Deathwatch Rulebook
那么，按照直径三次方放大的原则，2.4米高的原铸星际战士在身着动力甲的未武装状态下体重能够达到0.75到1.5吨。考虑到掉落的原铸星际战士携带有那种凡人根本举不动的沉重武器（而且还不止一把）外加大号的背包，这里就稳妥地取用1.5吨的质量数值。这里就可以带入动能公式了。
计算：
[(1500kg)*(11000m/s)^2]/2 = 9.075*10^10焦耳
结论：
冲击动能：9.075*10^10焦耳 或 21.69吨TNT当量
注意，这个能量数值才刚刚达到原铸星际战士的动力甲在承受完之后也完全不会受到任何伤害的程度。
