Basing on floating google spreadsheet with missile datamine:
Python 4 has identical weight and similar-ish motor to Type 81 (Japan SPAA) missiles, but lacks TV/contrast seeker option nor it have extended IR lock range of a Stinger/MIM72G seeker. It does have Stinger-like flare rejection of combined gatewidth and tracking suspension. Difference boils down to air drag values which are unknown to me.
So ye, P4 armed Spyder would be just step up from Chaparral and definitely not “top tier capable” SPAA/SAM system.
In game you already can throw 9L as far as 20-25km in head on with sufficiently good launch conditions, thus any range statements without launch conditions context needs to be taken with one wheelbarrow of salt.
Given how short No Escape Zone is on current Derbys even when launched from supersonic jet, I-Derbys aren’t all that outlandish idea for surface launched missile.
I-Derby is a Derby with a much better seeker, should be able to ignore chaff and other distractions much more. It is the I-Derby ER but without the booster
I see. Still, my idea was to put Derby ER (is there non-I Derby ER in first place?) on ground launchers as Israeli top tier SPAA/SAM system, given not the best reach on existing Derbys. Alternatively “SPYDER SR” with regular Derbys and then “SPYDER MR” with Derbys ER.
As for I-Derby on aviation… if “improved seeker” would be modeled akin MICAs already in game ie narrower notch angles, that might kinda-sorta work? But on what it would be put on, as Israeli aviation is almost done unless Snail entertains copypasting current jets just to put new missiles on them, while I-Derby ER is still an option. Or I-Derby will be relegated to some premium/event jet, while F-16I or F-15IA will go straight for ER.
I. Need. This. I am losing my mind playing top-tier Israel with little to nothing I can do against CAS. Israel would be great as a ground-only nation, but the lack of SPAA makes me want to throw my keyboard through my monitor.
Same, we’ll probably have to wait till June at least to get the SPYDER or anything better than the Chaparral/Machbet. I get bombed continuously by (Russian) CAS, APS is a joke and the only thing I can bring out that doesn’t cost 500/600 SP is a SPAA with 6 Km range or a helicopter with the same range (I bring out the helicopter, at least it flies). I’m gonna cry, haha.