I have to say these L3s are very nice motors. Of the small initial batch that Piotr has produced every firing has been easily accomplished with the thrust quickly steading and no sign of burn through on the 15mm diameter motors.
I just took one out for an air test on a 290mm span Depron [ ] and balsa T33. Weighs in at 40gms and got a very nice flight out of it.
Jetmaster motor as quoted in January 1954 aeromodeller engine analysis supplement advises jet master thrust as 1.875 ozs .
Jetmaster with short augmenter tube rated at 2.5 ozs thrust
jetmaster with long augmenter tube rated at 2.25 ozs thrust .
believe that 1 once force = 0.2780 newtons force so lets say L3 average at 500 mN from the graph then 1.875 ozs thrust = 0.52127 newtons or 521mN
So these L3 are equal to a jet master without augmenter tube -- does this sound about right .. i hope so ????