I graduated from McMaster University in 2010 from Mechanical Engineering, but in my final year, I designed a miniature jet engine for remote controlled aircraft. It has 2 counter rotating spools, each with a pressure ratio of 5, giving an overall thrust of 28.10 lbf. I’ve been working for close too 2 years now, so if I had to do it again, there are definitely a few things I’d change.