Yep, you can find it on one of the 40k wiki pages. It seems fine for dropping a Company, which might be ok having a few of these to secure a landing zone, but you're not going to fight much of an actual war with just a few companies of troops unless the locals are armed with sharp sticks or don't have any numbers what so ever.
The Tetrarch heavy lander I have in 'Tactica Imperialis', it sort of looks like a big 'aircraft' of sorts with about 5 battle cannon (one on the chin and the other 4 on each quarter) and what I'd presume is a really siege cannon/mortar on a top mounted turret. From it's description:
"These units where deployed via heavy lander, each company being delivered from orbit aboard a Tetrarch, an armoured interface vessel deisnged to carry heavy unit such as these into a contested warzone."
So it seems to do the same thing, drops a company, but its far more 'angry' about projecting force into the immediate area and the company's it was deploying where mechanised infantry, so it probably has more internal room, storage and lift capacity.
It still doesn't really solve the issue of deploying forces on proper war footing (ie- regiments of troops 10,000+) unless the Imperial protocol is to deploy them a company at a time to avoid having eggs in the one basket shot down... but it'd be pretty slow process.
The reason I'd say its slow is that if we look at an actual battle front like the Eastern Front in WW2.
Soviets 250 and Germans 200 actively deployed front line fighting Divisions at around its peak.
Each division is somewhere between 10,000 to 30,000 soldiers and comparatively speaking in IG terms, their divisions are roughly the equivalent of 1-3 Imperial Guard Regiments. The Imperial Guard does also deploy in those kinds of numbers if its sufficiently fighty... like the Siege of Vraks
You aren't dropping 2-4mil people on a planet with just landers, that's around 7-14000 individual drops
So going by that, actual troop-ships are the way to get stuff done. Get a full cargo ship, put as many barracks as you can into it and then land them on the planet, or going really big and ugly, a Universe Mass Conveyer with some Space Dock Piers and massive amounts of barracks, so the smaller troop ships can dock, fix themselves up, move mountains of people and vehicles, then just dump millions of angry IG all over someone's planet.
(Hey its Rogue Trader, getting big and ugly is what its all about!)
Edited by MKX, 09 October 2013 - 07:04 PM.