Most likely reasons for your GRAD not firing are:-
1) Not setting an ATTACK waypoint and a target using the TARGET button.
2) Too far away - beyond maximum range, too close - inside minimum range.
3) Not within angular limits, GRAD will only fire at a target within a certain angle from the way it is facing see details below. Occasionally I've had problems with rockets firing at a target directly in front, but that might have been range probs - I recall IronHand telling me GRAD and SMERCH will fire over the cab.
So you need to experiment with the placement of your units both in distance and in regard to which way they are facing.
Here is a bunch of info that I've deduced / collected from various forums including some stuff I got from a guy called JEFX.
It may help you with artillery / rockets in the Mission Editor.
OK, this is all stuff that I scribbled over the last 3 years in my Lockon notebook, hence some in km, some in Nm, so apologies for that.
ROCKETS
Smersh, Grad will fire a spill taking 40 secs / 20 secs respectively then will reload (about 15min?) before firing again.
ARTILLERY
Gvozdika - 6 rnds per min
Akatsia - 4 rnds per min
Msta - 8 rnds per min
Bereg - 10 rnds per min
Nona - 8 rnds per min
Max ranges
Smersh 70km
Grad 20km
MLRS 31km
M109 15nm
SAU Berg 18.5nm
SAU Gvozdika 15nm
SAU Akatsia 15nm
SAU Msta 15nm
SAU Nona 5.5nm
Naval
Ticonderoga 14.5km
Perry 14.5km
Moscow 20km
Neustrashimy 21.5km
Rezky 21.5km
Albatros 6km
Molniya 15km
Tanks - all 2400m
APC cannon - all 1000m
APC missiles
M2 3000m (7 shots)
BMP3 4000m (9 shots)
BMP2 4000m (5 shots)
BMP1 3000m (6 shots)
BMD1 3000m (3 shots)
AA against ground targets
Shilka 1800m
Gepard 2900m
Vulcan 2800m
Avenger 1300m
Tunguska 1400m
JEFX extra info
Some units have a minimum distance (under which they wont shoot):
MLRS has a 5 km. min. (30 km max) and a reload time of 9 minutes
GRAD a 10 km min. and a reload time of 8 minutes
SMERCH has 20 km minimum dist. and a reload time of 15 minutes
I am not sure but I think that the BEREG has a 10 km min too?
(still need to try?)
Then, some units have angles limitations:
MLRS (I think some limitation but I havent experimented with it??)
SAU Nona : only 35° Left and right are possible
GRAD : only 120° Left and 60° right
BEREG : only 120° left and 120° right
SMERCH : only 30° left or right
Artillery supplementary data
(experiments made June 11, 2007)
by JEFX
GROUND ARTILLERY
-All ground artillery units shoot their maximum number of rounds in 2 bursts (one big one and one small one), separated by approx 1’30’’ of waiting time.
-All of them take approx. 40 minutes to reload, ad infinitum.-All of the SAU family shoot approx. 8 rounds/min. while the M109 is roughly only one round/min.
-All three multiple launchers have been discussed before.Here is the number of rounds for each artillery unit between reloads :
SAU-Msta : 50 rounds
SAU-Akatsia : 46 rounds
SAU-Nona : 25 rounds
SAU-Gvodzika : 70 rounds
SAU-Bereg : 48 rounds
M109 : 56 rounds
SHIP ARTILLERY
-All ship-based artillery units have the same behavior : they shoot a 41 rounds burst, wait for a variable number of seconds, (see below) and shoot 41 rounds again, this pattern repeated a total of 5 times (except for the Perry, 4 times). For some of them, the last time is a smaller number of rounds (about 10). Then they all stop to shoot forever…
-All of them shoot at an approximate rate of 1 round/second (some faster, Molnya and Albatros, most of them a bit slower than 1 round/sec)Here are the peculiarities of each of them and the number of seconds between 41 rounds bursts:
Oliver Perry : 30 sec. wait
Ticonderoga : 30 sec. wait, 2 cannons simultaneously (one at the bow, one at the stern)
Molniya : 30 sec. wait (shoots faster)
Albatros : 13 sec. wait
Neustrahimy : 45 sec. wait
Rezky : 45 sec. wait, 2 cannons simultaneously (side by side at the stern)Moscow : 45 sec. wait, twin barrel cannon