IIRC the Wgr's are timed,2.2 seconds. Lusche can correct me it I have the wrong time.....

So that would mean depending on direction of fire,rear aspect or frontal you would need to use a different range.
I think the 1.5 would work in a frontal attack but you need to be slightly close for a rear attack,also closure rates can come into play.
I have seen a whole formation go down with a single rocket that exploded in the middle of the formation but usually you need 2 rockets to take out a formation.
They will explode on ground target also,again IIRC they have aprox 150LBs of explosive power.
The biggest issue with using them is the drag on the airframe,they will slow a plane about 20 MPH and even after firing the drag is still there.
I hope I answered most the question,if you have an others just ask!
YMMV.
