VMM-363 (MV-22s)...

I was wondering if we were about to see a lawn dart for sec. That cannon was starting to oscilate for a bit but seems to have settled down. When was the last time a M-777 was planted in the Mojave? I know the Army uses two point sling loading to avoid this problem (or I think they do). This is probably a stupid question but why don't they use a small chute attached to the back end of the "cargo" to steady it during flight?