We had both these in test for our FHT mod, one was a Pak40 that you could enter and push to where you want it to be, (had 2 positions, one for firing, one for pushing, much like the French75mm cannon) then stabilize the arms and start to shoot, the other was towed by a truck and then deployed (I believe that was a Zis3 though), none of them worked as we wanted, for some reason the mobilePhysics made the Zis3 not stabilize itself, it was jumping around like a boat that is on land or a jeep that is driven onto another object..
If someone feels like finishing the codes for these let us know and we include it when we release all our stuff publicly, I agree with the idea, AT-guns and artillery should definitaley also come in move-able versions, since after playing a map 30 times its too easy to pixel out stationary defenses.. (or strafe them, so AA also must come in this, im lucky there is allready Mobile AA in FH though)

unfortunately the mobile AA are crumpsy and fragile...they are big targets...

we definitely need towed ones or movable ones

For me the Flak 18 in FH 0.61 did not cause any lag. I thought it was very cool not only because of the gameplay impact, but because of the wow factor and the way that it looked REAL...instead of this "gun on the top of a truck" business.

I have a suggestion although I guess I wont be playing with artillery when FH2 comes out:

Since making it mobile causes lag, and people tend to use it unproperly, why not predefine spots where it can be deployed? Maybe, like we have just seen with the new "push mode", it could be configured to be deployed on whatever positions depending on which outposts have been captured. I dont know if this can be done but better leave it till second release.

Expanding on this concept, how about in the count down before starting a match the commander chooses predefined spots at their spawning points where to place equipment like artillery, mortars, AA, or machine guns so it would make the maps more dynamic a bit like a RTS style game.
Players perhaps wouldn't get bored so quickly playing the same maps over and over again and extend the life cycle of maps.

if that is possible it would be great ..., but still artillery need to be TOWed to front rather than stupid poping out ...

It wouldn't pop out, it would be placed before the match started, or possibly after a flag has been captured.

How long does a match last, 1/2 an hour?
How many towed pieces would actually be setup and in place before the enemy attacked, in my opinion towed artillery would be destroyed on route or as it is being setup just seems like a merry go round to me.

Don't know if the devs plan to look at towing artillery yet!

well, logistics is an important part of battle too...

We could always have deployables like the PR team have done with 0.6 of late & have engineers put them together so to speak.

That would make engineers more useful.