RE: What will happen if???
I have had 2 situations with an engine out on my Twinstar. All I can say is just fly it, give it full throttle and it will fly on 1 engine. When coming in for a landing, make your approach and then kill the running engine and settle in for a dead stick landing. I was shaking when it happened the first time, it was either crash or try to fly it. I was amazed at how well it flew on 1 motor. The 25FX's are perfect for the Twinstar. I use it to warm up with before I fly my A-26 Invader with twin 56 Saito's.
Good Luck