This happened few days ago. I went to hotpad in the 51D (50% and with DTs). I did full stop and re-armed and fuel (Messenge of ''reload complete'' came on) I got off the runway and heard large group of baddies were IB and high. I decided to head out and climb (auto climb) opposite direction to hopefully get over them, and I went afk for few minutes. I was flying for maybe 10 minutes and engine quit. I thought maybe my DTs went dry so I went to drop them, but they weren't there. I didn't drop them during my climb or on when taxing on the runway.