Valved Pulse Jet short engine runs

Testing the valved pulse Jet at Airdrie airport. It was brisk cold but very happy to get out with Andy and do short engine runs, was exciting and fun. I thought of friends that could not make it out of short notice so I made a video of this to help the curiosity🤔🤓
The first video the engine had orange paint but through some testing the fuel would eat the paint so I left it a stainless polished look.