RE: Artillery
…no… quite easy to airlift… even a cessna can carry a paper artillery piece… 🙂
The basis for the crusader is to fire multiple shots at different elevations so that the rounds land almost simultaneously. Of course the cost and weight of them means that you could only afford a few and if they were smaller and lighter and cheaper you could get the same effect of several simultaneous impacts simply by using several at once… of course it died because it can’t make 12 rounds land on target at roughly the same time like MRLS can…
(BTW Elp here is another weapon you once asked me about that can land two rounds on target at the same time:
http://club.guns.ru/eng/gp25.html
(see the bottom photo caption on how to lob one round on a high trajectory and then reload and direct fire a second round so that they arrive almost at the same time))