I never actually got airsick, but as a previous tweet FAIP, I have seen a few cases. Most students never get actively airsick. Some of it is dependent on the time of year and wx for their first few sorties. A hot, bumpy day in a tweet with no yaw damper and basically no air conditioner while wearing gloves, parachute, helmet, and mask is enough to make anyone not feel too good. Those that get airsick usually only have one episode. If you have too many, then the flt docs put you on meds for a few sorties (at least that's what they did a few yrs ago). Getting a few rides in while on meds is usually more than enough to relax most students enough that they never have a problem after that. There are the occasional few that never get over the problem, but I seriously doubt if you will have that problem if you are already out flying acro. You definitely want to eat prior to flying, but don't eat too much nor something that may come back up easy like a burrito. I remember alot of students swearing by saltines. Best of luck.