Hi all! I am a mechanical engineering student. I plan on making a small model train for this project using scrap or easily available materials(as this is a college project I can't just buy any parts). I am planning to use either a stirling engine or a steam engine for the locomotive. Could anyone please tell me which engine would be the best for this process? I prefer steam engine though. An info that could help me get started in a right way would be greatly appreciated. And any additional details would be greatly helpful! Thank You.