Really too cold today (for me anyway it's 12 degrees C.)
With the "War Lord" overseas,

I've been able to do some fuel flow testing on my small 12 pound thrust valveless pulse jet. Just to get more of a handle on the starting and running of it.
Today's conditions are probably the worst case situation, with the LPG cylinder being so cool.
I found that my fittings that connect to the flex line (both ends) are too restrictive with only a 3mm hole through the brass, as in the cold conditions, I couldn't get to full throttle.
Even with the cylinder valve fully on. I'm guessing it was only at 80% power.
It was also very reluctant to restart when hot as well. I reckon there was some icing problems in the brass fittings. If I left it for 15 mins it would instantly restart.
By the time I had the fittings undone, it had thawed, but the moisture was still visible.
I drilled them out and it made a huge difference. Spark on, gas on and a 120 psi sniff of air from my air lance and it was away each time.
After a few runs it warmed up the shed nicely, but it was a bit hard on the eyes with the fumes.
You will be pleased to know “Landyacht” that it shook some of my ring spanners off their nails. [}:)]
I got the engine mountings cut out and drilled for the bigger “Lockwood”.
I just have to weld them up now.
The local hydraulic shop is getting me some 10mm steel tube for its fuel system. It's been delayed by end of financial year stocktakes in Perth.
Still much to do.