On a fighter it could be done easily. The spinning factor will much less noticed there (and no, you can't reduce it). Just add it as a weapon the fighter (let's say fighters and gunboats, not bombers, they're too big and slow to be kamikases). So, with that weapon added the secondary weapon option for the fighter will be enabled, and when you click that and on a target the kamikase weapon will be activated and the fighter will collide with the target.