Had one at 300' once, after a full brf prior to T/O. The time it took to discover that the failing was actualy with the A/C as opposed to the student was huge (compared to that avaliable), sub ground idle power for 16 seconds and still I didn't pull the handle. I like to think I would have, but the spool up was audible after about 10secs. The reality is that I'll never know. It's all well and good practising it at 300' far less 3000, the reality is far from similar. Bottom line, SHAR guy after throwing away the sea bird when asked when he decided to eject answered... 12 years ago. It's worth considering, I didn't.