A Do-It-Yourself Pulsejet Model Rocket on YouTube
Part 1: https://www.youtube.com/watch?v=zV1snAMK-bY
Part 2: https://www.youtube.com/watch?v=Skztj77h9Zc
Part 3: https://www.youtube.com/watch?v=abr2Pt7SGi4
I can't recommend his methods (really, really can't!), but his progress is remarkable.
Jay