This is so sad for all involved. There are no words to adequately express the feelings I have regarding this incident, but, Don, thanks for coming online to express your feelings to the family and friends of this poor lady. I know it must be hard on you and your team.
I am in no way an engineer and have no idea if, or how it could be done, but is there a way the wheel and assembly can somehow be tethered to the axle? I know the wheel must move freely, but doesn't the hub on the axle spin, as well? I hope I am not showing my ignorance, but I would love to see a solution, as I have seen many tires come off of race cars, not only drag cars, but all types, most not with this type of outcome, but dangerous nonetheless.
Prayers out to all involved. My thoughts are with you all.
Pat