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Yield (inherent):
* (1 + 10% * Drone Interfacing level)
* (1 + 5% * Mining Drone Operation level)
* (1 + 10% * Industrial Command Ships level)
* (1 + 100%) (Orca role bonus)
* (1 + 2% * Mining Drone Specialization level) ('Augmented' only)
Yield (configurable):
* (1 + 15%) (Large Drone Mining Augmentor II, not stacking penalised)
* (1 + 10%) (Large Drone Mining Augmentor I, not stacking penalised)

Here I'll presume max skills, and 2 T2 rigs and 1 T1 rig (there isn't enough calibration to fit 3 T2 rigs), which shouldn't seem out of order for a drone-mining-focussed Orca. This results in a (maximum) total yield modifier of * 8.19296875 for T1, T2 and Harvester drones, or * 9.001265625 for 'Augmented' drones.

Note that the typical Mining Barge/Exhumer won't have those rigs (because those slots are needed for tank or cpu rigs, and because the mining drone rigs actually reduce cpu even more, which is tight on exhumers and plentiful on Orcas), and are thus typically limited to total yield modifiers of * 1.875 for T1, T2 and Harvester drones, or * 2.0625 for 'Augmented' drones.

Velocity (inherent):
* (1 + 5% * Drone Navigation level)
* (1 + 2% * Mining Drone Specialization level) ('Augmented' only)
Velocity (configurable):
* (1 + 30%) (Drone Navigation Computer II, stacking penalised with self and rig)
* (1 + 15%) (Large Drone Speed Augmentor II, stacking penalised with self and module)

Here I'll presume max skills, no rigs (since those slots will be used for yield rigs) and 1 T2 Drone Navigation Computer (more damages tank too much and is subject to stacking penalties, and while better modules exist, those modules are much (faction) to vastly (officer) more expensive). This results in an (optimal?) total velocity modifier of * 1.625 for T1, T2 and Harvester drones, or * 1.7875 for 'Augmented' drones.

Note: applicability (of the Drone Navigation Computer modules) and stacking penalty data (or lack thereof for the Drone Mining Augmentor rigs) are as observed on SiSi @ 2016-10-30 10:00 UTC.

Summary: (with the above presumptions)

Mining Drone:
* Yield: base 25 m³/min each, final 204.57 m³/min each, or 1022.87 m³/min for 5
* Velocity: base 400 m/s, final 650 m/s

Mining Drone II:
* Yield: base 33 m³/min each, final 270.37 m³/min each, or 1351.84 m³/min for 5
* Velocity: 500 m/s, final 812.5 m/s

'Augmented' Mining Drone
* Yield: base 37 m³/min each, final 333.05 m³/min each, or 1665.23 m³/min for 5
* Velocity: base 550 m/s, final 983.13 m/s

Harvester Mining Drone:
* Yield: base 42 m³/min each, final 342.68 m³/min each, or 1718.42 m³/min for 5
* Velocity: base 350 m/s, final 568.75 m/s

Updated: removed Mining Drone specialization bonus from T2 Mining Drone stats; They might get that requirement in the future, but currently T2 Mining Drones do not require and thus don't benefit from Mining Drone Specialization.

On Sisi I fitted four Navigation Computers to a Skiff and pushed the speed of Mining Drone II's over 1700 m/s. It is not really practical to sacrifice the shield tanking slots.

I am not specced for Mining Drone skilling, but the Specialization skills are x5 trains.

If you do not have Drone Rigging 5 yet, it should be on your queue now - if you intend to be using the Mining Drone Augument Rigs. They are CPU penalising. Particularly since MLUs also have CPU trade-off.

Yup, I wouldn't fit more than one, and even that one has to compete with a scan resolution scripted Sensor Booster II because Orcas take forever locking asteroids (or anything else smaller than a freighter)
I suppose it helps starting out as Gallente ;-)
So far I've found Orcas to remain mostly powergrid-limited (if you want that 500MN microwarpdrive without using fitting mods or rigs, and you do if you want to enter warp in 12 seconds from stand-still), and not so much CPU-limited. But it never hurts, I suppose. For Mining Barges/Exhumers, despite the impending improved access to better ('Augmented', Harvester) mining drones, and despite the new specialization skill, I'd still not put Drone Mining Augmentor rigs on them. The total yield increase (viewed over the sum of drones + stripminers) is not worth it compared to using all-MLU-lowslot loadouts that boost stripminers (imho). Especially considering that all those friendly Orcas in the belts only improve your stripminer cycle time, and do nothing for your drones.

Sgt ocker, how does the orca get only a couple of cycles before its full?

Your naive if you think afk mining is a myth. The most used barges are still retties and macks and rocks don't deplete after a few minutes. Plag rocks with 40-50k units and veld with over 100k units are not uncommon. I don't think ice belts deplete as fast as you think either. Teonusude is a ice mining hot spot but during the week each belt (there are two) can last a couple hours.

Ah i see. My bad.

Yes indeed, take a trip to teon during the week. I'll show you some dense veld rocks with over 100k units in. I'll also bump some miners for you and show you how they sit still for 20minutes.

http://imgur.com/a/XvaRq

Kind of off-topic but there are problems with your theory.

1) Miners won't try to gank bumpers because they can't be bothered.
2) Miners can't successfully gank bumpers because CODE. always wins.

And

3) It will give us a kill right on them so their mining days are over for at least a month.

It's a support ship, you're not supposed to field a fleet of Orcas instead of Mining Barges or Exhumers, you're supposed to field an Orca and a fleet of Exhumers or make your trade-off in survivability for the lower yield of the Orca.

Your suggestions here are just a blatant request to benefit High-Sec miners because it's basically never going to be profitable to gank an Orca, the best you can do is bump them, something CCP is already looking at plans for dealing with as a system because it's riskless gameplay for the attacker and frustrating for the victim.

Well Said Cade!
Industrial Command ships with mining drone bonuses is the BIG WIN. It can mine! Even if only 1/2 effective as an Exhumer. If you have an Orca and four Skiffs, you now have a 12.5% buff to your fleet resource gathering. The 187,500m3 maxed out Orca Ore hold has you staying on grid a whole lot longer which ups your fleets overall mining effectiveness. We all just got a GIANT bonus to mining in Orca boosted fleets without one single nerf or increase to risk. Lets quietly take this and be happy with it!

Since when do EVE players do what they are "supposed" to?

These changes sound really good. One of the big problems you had as a miner was that someone needs to do the boost job and that someone will have their ore/min heavily reduced by sitting in the Orca. With this change people will love to be the booster as that means they can still go crazy on yield while having the biggest ore storage capacity.

It is tough to say how the Orca will compare to the smaller Porpoise, with lower gain and capacity but for a fraction of the price. My guess is that larger corps will stick with the Orca and smaller ones with the Porpoise.

The fitting upgrades look great, especially the high slots, which have been one of the major issues when fitting and Orca up to now. About the mid slots it would be great to know the passive shield recharge rate to see if those have - again - to be wasted on extenders, or if you can actually focus on mining stuff. I would have expected a slightly higher shield resistance here, as after all this is now the "T2" industrial command ship.

The align time is still a pain, but then this ship just has to have some downsides, so I guess it is ok. I wish there would be like a travel mode that you can switch on/off on stations only, to allow you to move your Orca from one system to another in less than what feels like an eternity.